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$NOMOD51;**** **** **** **** ****;; Bluejay digital ESC firmware for controlling brushless motors in multirotors;; Copyright 2020 Mathias Rasmussen; Copyright 2011, 2012 Steffen Skaug;; This file is part of Bluejay.;; Bluejay is free software: you can redistribute it and/or modify; it under the terms of the GNU General Public License as published by; the Free Software Foundation, either version 3 of the License, or; (at your option) any later version.;; Bluejay is distributed in the hope that it will be useful,; but WITHOUT ANY WARRANTY; without even the implied warranty of; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the; GNU General Public License for more details.;; You should have received a copy of the GNU General Public License; along with Bluejay. If not, see <http://www.gnu.org/licenses/>.;;**** **** **** **** ****;; Bluejay is a fork of BLHeli_S <https://github.com/bitdump/BLHeli> by Steffen Skaug.;; The input signal can be DShot with rates: DShot150, DShot300 and DShot600.;; This file is best viewed with tab width set to 5.;;**** **** **** **** ****; Master clock is internal 24MHz oscillator (or 48MHz, for which the times below are halved); Although 24/48 are used in the code, the exact clock frequencies are 24.5MHz or 49.0 MHz; Timer 0 (41.67ns counts) always counts up and is used for; - RC pulse measurement; - DShot telemetry pulse timing; Timer 1 (41.67ns counts) always counts up and is used for; - DShot frame sync detection; Timer 2 (500ns counts) always counts up and is used for; - RC pulse timeout counts and commutation times; Timer 3 (500ns counts) always counts up and is used for; - Commutation timeouts; PCA0 (41.67ns counts) always counts up and is used for; - Hardware PWM generation;;**** **** **** **** ****; Motor control:; - Brushless motor control with 6 states for each electrical 360 degrees; - An advance timing of 0deg has zero cross 30deg after one commutation and 30deg before the next; - Timing advance in this implementation is set to 15deg nominally; - Motor pwm is always damped light (aka complementary pwm, regenerative braking); Motor sequence starting from zero crossing:; - Timer wait: Wt_Comm 15deg ; Time to wait from zero cross to actual commutation; - Timer wait: Wt_Advance 15deg ; Time to wait for timing advance. Nominal commutation point is after this; - Timer wait: Wt_Zc_Scan 7.5deg ; Time to wait before looking for zero cross; - Scan for zero cross 22.5deg ; Nominal, with some motor variations;; Motor startup:; There is a startup phase and an initial run phase, before normal bemf commutation run begins.;;**** **** **** **** ****; List of enumerated supported ESCsA_ EQU 1 ; X X RC X MC MB MA CC X X Cc Cp Bc Bp Ac ApB_ EQU 2 ; X X RC X MC MB MA CC X X Ap Ac Bp Bc Cp CcC_ EQU 3 ; Ac Ap MC MB MA CC X RC X X X X Cc Cp Bc BpD_ EQU 4 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Com fets invertedE_ EQU 5 ; L1 L0 RC X MC MB MA CC X L2 Cc Cp Bc Bp Ac Ap A with LEDsF_ EQU 6 ; X X RC X MA MB MC CC X X Cc Cp Bc Bp Ac ApG_ EQU 7 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Like D, but non-inverted com fetsH_ EQU 8 ; RC X X X MA MB CC MC X Ap Bp Cp X Ac Bc CcI_ EQU 9 ; X X RC X MC MB MA CC X X Ac Bc Cc Ap Bp CpJ_ EQU 10 ; L2 L1 L0 RC CC MB MC MA X X Cc Bc Ac Cp Bp Ap LEDsK_ EQU 11 ; X X MC X MB CC MA RC X X Ap Bp Cp Cc Bc Ac Com fets invertedL_ EQU 12 ; X X RC X CC MA MB MC X X Ac Bc Cc Ap Bp CpM_ EQU 13 ; MA MC CC MB RC L0 X X X Cc Bc Ac Cp Bp Ap X LEDN_ EQU 14 ; X X RC X MC MB MA CC X X Cp Cc Bp Bc Ap AcO_ EQU 15 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Like D, but low side pwmP_ EQU 16 ; X X RC MA CC MB MC X X Cc Bc Ac Cp Bp Ap XQ_ EQU 17 ; Cp Bp Ap L1 L0 X RC X X MA MB MC CC Cc Bc Ac LEDsR_ EQU 18 ; X X RC X MC MB MA CC X X Ac Bc Cc Ap Bp CpS_ EQU 19 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Like O, but com fets invertedT_ EQU 20 ; RC X MA X MB CC MC X X X Cp Bp Ap Ac Bc CcU_ EQU 21 ; MA MC CC MB RC L0 L1 L2 X Cc Bc Ac Cp Bp Ap X Like M, but with 3 LEDsV_ EQU 22 ; Cc X RC X MC CC MB MA X Ap Ac Bp X X Bc CpW_ EQU 23 ; RC MC MB X CC MA X X X Ap Bp Cp X X X X Tristate gate driver
;**** **** **** **** ****; Select the port mapping to use (or unselect all for use with external batch compile file);ESCNO EQU A_
;**** **** **** **** ****; Select the MCU type (or unselect for use with external batch compile file);MCU_48MHZ EQU 0
;**** **** **** **** ****; Select the fet dead time (or unselect for use with external batch compile file);FETON_DELAY EQU 15 ; 20.4ns per step
;**** **** **** **** ****; Select the pwm frequency (or unselect for use with external batch compile file);PWM_FREQ EQU 0 ; 0=24, 1=48, 2=96 kHz
PWM_CENTERED EQU FETON_DELAY > 0 ; Use center aligned pwm on ESCs with dead time
IF MCU_48MHZ < 2 AND PWM_FREQ < 3 ; Number of bits in pwm high byte PWM_BITS_H EQU (2 + MCU_48MHZ - PWM_CENTERED - PWM_FREQ)ENDIF
$include (Common.inc) ; Include common source code for EFM8BBx based ESCs
;**** **** **** **** ****; Programming defaultsDEFAULT_PGM_RPM_POWER_SLOPE EQU 9 ; 0=Off, 1..13 (Power limit factor in relation to rpm)DEFAULT_PGM_COMM_TIMING EQU 4 ; 1=Low 2=MediumLow 3=Medium 4=MediumHigh 5=HighDEFAULT_PGM_DEMAG_COMP EQU 2 ; 1=Disabled 2=Low 3=HighDEFAULT_PGM_DIRECTION EQU 1 ; 1=Normal 2=Reversed 3=Bidir 4=Bidir revDEFAULT_PGM_BEEP_STRENGTH EQU 40 ; 0..255 (BLHeli_S is 1..255)DEFAULT_PGM_BEACON_STRENGTH EQU 80 ; 0..255DEFAULT_PGM_BEACON_DELAY EQU 4 ; 1=1m 2=2m 3=5m 4=10m 5=InfiniteDEFAULT_PGM_ENABLE_TEMP_PROT EQU 7 ; 0=Disabled 1=80C 2=90C 3=100C 4=110C 5=120C 6=130C 7=140C
DEFAULT_PGM_BRAKE_ON_STOP EQU 0 ; 1=Enabled 0=DisabledDEFAULT_PGM_LED_CONTROL EQU 0 ; Byte for LED control. 2bits per LED, 0=Off, 1=On
DEFAULT_PGM_STARTUP_POWER_MIN EQU 51 ; 0..255 => (1000..1125 Throttle): value * (1000 / 2047) + 1000DEFAULT_PGM_STARTUP_BEEP EQU 1 ; 0=Short beep, 1=MelodyDEFAULT_PGM_DITHERING EQU 1 ; 0=Disabled, 1=Enabled
DEFAULT_PGM_STARTUP_POWER_MAX EQU 25 ; 0..255 => (1000..2000 Throttle): Maximum startup power
;**** **** **** **** ****; Temporary register definitionsTemp1 EQU R0Temp2 EQU R1Temp3 EQU R2Temp4 EQU R3Temp5 EQU R4Temp6 EQU R5Temp7 EQU R6Temp8 EQU R7
;**** **** **** **** ****; RAM definitions; Bit-addressable data segmentDSEG AT 20hBit_Access: DS 1 ; MUST BE AT THIS ADDRESS. Variable at bit accessible address (for non interrupt routines)Bit_Access_Int: DS 1 ; Variable at bit accessible address (for interrupts)
Flags_Startup: DS 1 ; State flags. Reset upon init_startFlag_Startup_Phase BIT Flags_Startup.0 ; Set when in startup phaseFlag_Initial_Run_Phase BIT Flags_Startup.1 ; Set when in initial run phase, before synchronized run is achieved; Note: Remaining bits must be cleared
Flags1: DS 1 ; State flags. Reset upon init_startFlag_Timer3_Pending BIT Flags1.0 ; Timer 3 pending flagFlag_Demag_Detected BIT Flags1.1 ; Set when excessive demag time is detectedFlag_Comp_Timed_Out BIT Flags1.2 ; Set when comparator reading timed outFlag_Motor_Running BIT Flags1.3Flag_Motor_Started BIT Flags1.4 ; Set when motor is startedFlag_Dir_Change_Brake BIT Flags1.5 ; Set when braking before direction changeFlag_High_Rpm BIT Flags1.6 ; Set when motor rpm is high (Comm_Period4x_H less than 2)Flag_Low_Pwm_Power BIT Flags1.7 ; Set when pwm duty cycle is below 50%
Flags2: DS 1 ; State flags. NOT reset upon init_startFlag_Pgm_Dir_Rev BIT Flags2.0 ; Programmed direction. 0=normal, 1=reversedFlag_Pgm_Bidir_Rev BIT Flags2.1 ; Programmed bidirectional direction. 0=normal, 1=reversedFlag_Pgm_Bidir BIT Flags2.2 ; Programmed bidirectional operation. 0=normal, 1=bidirectionalFlag_Skip_Timer2_Int BIT Flags2.3 ; Set for 48MHz MCUs when timer 2 interrupt shall be ignoredFlag_Clock_At_48MHz BIT Flags2.4 ; Set if 48MHz MCUs run at 48MHzFlag_Rcp_Stop BIT Flags2.5 ; Set if the RC pulse value is zeroFlag_Rcp_Dir_Rev BIT Flags2.6 ; RC pulse direction in bidirectional modeFlag_Rcp_DShot_Inverted BIT Flags2.7 ; DShot RC pulse input is inverted (and supports telemetry)
Flags3: DS 1 ; State flags. NOT reset upon init_startFlag_Telemetry_Pending BIT Flags3.0 ; DShot telemetry data packet is ready to be sentFlag_Dithering BIT Flags3.1 ; Dithering enabledFlag_Had_Signal BIT Flags3.2 ; Used to detect reset after having had a valid signal
Tlm_Data_L: DS 1 ; DShot telemetry data (lo byte)Tlm_Data_H: DS 1 ; DShot telemetry data (hi byte)
;**** **** **** **** ****; Direct addressing data segmentDSEG AT 30hRcp_Outside_Range_Cnt: DS 1 ; RC pulse outside range counter (incrementing)Rcp_Timeout_Cntd: DS 1 ; RC pulse timeout counter (decrementing)Rcp_Stop_Cnt: DS 1 ; Counter for RC pulses below stop value
Power_On_Wait_Cnt_L: DS 1 ; Power on wait counter (lo byte)Power_On_Wait_Cnt_H: DS 1 ; Power on wait counter (hi byte)
Startup_Cnt: DS 1 ; Startup phase commutations counter (incrementing)Startup_Zc_Timeout_Cntd: DS 1 ; Startup zero cross timeout counter (decrementing)Initial_Run_Rot_Cntd: DS 1 ; Initial run rotations counter (decrementing)Startup_Stall_Cnt: DS 1 ; Counts start/run attempts that resulted in stall. Reset upon a proper stopDemag_Detected_Metric: DS 1 ; Metric used to gauge demag event frequencyDemag_Pwr_Off_Thresh: DS 1 ; Metric threshold above which power is cutLow_Rpm_Pwr_Slope: DS 1 ; Sets the slope of power increase for low rpm
Timer2_X: DS 1 ; Timer 2 extended bytePrev_Comm_L: DS 1 ; Previous commutation timer 2 timestamp (lo byte)Prev_Comm_H: DS 1 ; Previous commutation timer 2 timestamp (hi byte)Prev_Comm_X: DS 1 ; Previous commutation timer 2 timestamp (ext byte)Prev_Prev_Comm_L: DS 1 ; Pre-previous commutation timer 2 timestamp (lo byte)Prev_Prev_Comm_H: DS 1 ; Pre-previous commutation timer 2 timestamp (hi byte)Comm_Period4x_L: DS 1 ; Timer 2 counts between the last 4 commutations (lo byte)Comm_Period4x_H: DS 1 ; Timer 2 counts between the last 4 commutations (hi byte)Comparator_Read_Cnt: DS 1 ; Number of comparator reads done
Wt_Adv_Start_L: DS 1 ; Timer 3 start point for commutation advance timing (lo byte)Wt_Adv_Start_H: DS 1 ; Timer 3 start point for commutation advance timing (hi byte)Wt_Zc_Scan_Start_L: DS 1 ; Timer 3 start point from commutation to zero cross scan (lo byte)Wt_Zc_Scan_Start_H: DS 1 ; Timer 3 start point from commutation to zero cross scan (hi byte)Wt_Zc_Tout_Start_L: DS 1 ; Timer 3 start point for zero cross scan timeout (lo byte)Wt_Zc_Tout_Start_H: DS 1 ; Timer 3 start point for zero cross scan timeout (hi byte)Wt_Comm_Start_L: DS 1 ; Timer 3 start point from zero cross to commutation (lo byte)Wt_Comm_Start_H: DS 1 ; Timer 3 start point from zero cross to commutation (hi byte)
Power_Pwm_Reg_L: DS 1 ; Power pwm register setting (lo byte)Power_Pwm_Reg_H: DS 1 ; Power pwm register setting (hi byte)Damp_Pwm_Reg_L: DS 1 ; Damping pwm register setting (lo byte)Damp_Pwm_Reg_H: DS 1 ; Damping pwm register setting (hi byte)
Pwm_Limit: DS 1 ; Maximum allowed pwm (8-bit)Pwm_Limit_By_Rpm: DS 1 ; Maximum allowed pwm for low or high rpm (8-bit)Pwm_Limit_Beg: DS 1 ; Initial pwm limit (8-bit)
Adc_Conversion_Cnt: DS 1 ; Adc conversion counterCurrent_Average_Temp: DS 1 ; Current average temperature (lo byte ADC reading, assuming hi byte is 1)Temp_Prot_Limit: DS 1 ; Temperature protection limit
Beep_Strength: DS 1 ; Strength of beeps
Flash_Key_1: DS 1 ; Flash key oneFlash_Key_2: DS 1 ; Flash key two
DShot_Pwm_Thr: DS 1 ; DShot pulse width threshold value (timer 0 ticks)DShot_Timer_Preset: DS 1 ; DShot timer preset for frame sync detection (timer 1 lo byte)DShot_Frame_Start_L: DS 1 ; DShot frame start timestamp (timer 2 lo byte)DShot_Frame_Start_H: DS 1 ; DShot frame start timestamp (timer 2 hi byte)DShot_Frame_Length_Thr: DS 1 ; DShot frame length criteria (timer 2 ticks)
DShot_Cmd: DS 1 ; DShot commandDShot_Cmd_Cnt: DS 1 ; DShot command count
; Pulse durations for GCR encoding DShot telemetry dataDShot_GCR_Pulse_Time_1: DS 1 ; Encodes binary: 1DShot_GCR_Pulse_Time_2: DS 1 ; Encodes binary: 01DShot_GCR_Pulse_Time_3: DS 1 ; Encodes binary: 001
DShot_GCR_Pulse_Time_1_Tmp: DS 1DShot_GCR_Pulse_Time_2_Tmp: DS 1DShot_GCR_Pulse_Time_3_Tmp: DS 1
DShot_GCR_Start_Delay: DS 1
;**** **** **** **** ****; Indirect addressing data segmentsISEG AT 080h ; The variables below must be in this sequence_Pgm_Gov_P_Gain: DS 1 ;Pgm_Startup_Power_Min: DS 1 ; Minimum power during startup phasePgm_Startup_Beep: DS 1 ; Startup beep melody on/offPgm_Dithering: DS 1 ; Enable ditheringPgm_Startup_Power_Max: DS 1 ; Maximum power (limit) during startup (and starting initial run phase)_Pgm_Rampup_Slope: DS 1 ;Pgm_Rpm_Power_Slope: DS 1 ; Low RPM power protection slope (factor)_Pgm_Pwm_Freq: DS 1 ; PWM frequencyPgm_Direction: DS 1 ; Rotation direction_Pgm_Input_Pol: DS 1 ; Input PWM polarityInitialized_L_Dummy: DS 1 ; Place holderInitialized_H_Dummy: DS 1 ; Place holder_Pgm_Enable_TX_Program: DS 1 ; Enable/disable value for TX programming_Pgm_Main_Rearm_Start: DS 1 ; Enable/disable re-arming main every start_Pgm_Gov_Setup_Target: DS 1 ; Main governor setup target_Pgm_Startup_Rpm: DS 1 ; Startup RPM_Pgm_Startup_Accel: DS 1 ; Startup acceleration_Pgm_Volt_Comp: DS 1 ; Voltage compPgm_Comm_Timing: DS 1 ; Commutation timing_Pgm_Damping_Force: DS 1 ; Damping force_Pgm_Gov_Range: DS 1 ; Governor range_Pgm_Startup_Method: DS 1 ; Startup method_Pgm_Min_Throttle: DS 1 ; Minimum throttle_Pgm_Max_Throttle: DS 1 ; Maximum throttlePgm_Beep_Strength: DS 1 ; Beep strengthPgm_Beacon_Strength: DS 1 ; Beacon strengthPgm_Beacon_Delay: DS 1 ; Beacon delay_Pgm_Throttle_Rate: DS 1 ; Throttle ratePgm_Demag_Comp: DS 1 ; Demag compensation_Pgm_BEC_Voltage_High: DS 1 ; BEC voltage_Pgm_Center_Throttle: DS 1 ; Center throttle (in bidirectional mode)_Pgm_Main_Spoolup_Time: DS 1 ; Main spoolup timePgm_Enable_Temp_Prot: DS 1 ; Temperature protection enable_Pgm_Enable_Power_Prot: DS 1 ; Low RPM power protection enable_Pgm_Enable_Pwm_Input: DS 1 ; Enable PWM input signal_Pgm_Pwm_Dither: DS 1 ; Output PWM ditherPgm_Brake_On_Stop: DS 1 ; Braking when throttle is zeroPgm_LED_Control: DS 1 ; LED control
ISEG AT 0B0hStack: DS 16 ; Reserved stack space
ISEG AT 0C0hDithering_Patterns: DS 16 ; Bit patterns for pwm dithering
ISEG AT 0D0hTemp_Storage: DS 48 ; Temporary storage
;**** **** **** **** ****; EEPROM code segments; A segment of the flash is used as "EEPROM", which is not available in SiLabs MCUsCSEG AT 1A00hEEPROM_FW_MAIN_REVISION EQU 0 ; Main revision of the firmwareEEPROM_FW_SUB_REVISION EQU 9 ; Sub revision of the firmwareEEPROM_LAYOUT_REVISION EQU 201 ; Revision of the EEPROM layout
Eep_FW_Main_Revision: DB EEPROM_FW_MAIN_REVISION ; EEPROM firmware main revision numberEep_FW_Sub_Revision: DB EEPROM_FW_SUB_REVISION ; EEPROM firmware sub revision numberEep_Layout_Revision: DB EEPROM_LAYOUT_REVISION ; EEPROM layout revision number
_Eep_Pgm_Gov_P_Gain: DB 0FFhEep_Pgm_Startup_Power_Min: DB DEFAULT_PGM_STARTUP_POWER_MINEep_Pgm_Startup_Beep: DB DEFAULT_PGM_STARTUP_BEEPEep_Pgm_Dithering: DB DEFAULT_PGM_DITHERINGEep_Pgm_Startup_Power_Max: DB DEFAULT_PGM_STARTUP_POWER_MAX_Eep_Pgm_Rampup_Slope: DB 0FFhEep_Pgm_Rpm_Power_Slope: DB DEFAULT_PGM_RPM_POWER_SLOPE ; EEPROM copy of programmed startup power_Eep_Pgm_Pwm_Freq: DB 0FFhEep_Pgm_Direction: DB DEFAULT_PGM_DIRECTION ; EEPROM copy of programmed rotation direction_Eep__Pgm_Input_Pol: DB 0FFhEep_Initialized_L: DB 055h ; EEPROM initialized signature (lo byte)Eep_Initialized_H: DB 0AAh ; EEPROM initialized signature (hi byte)_Eep_Enable_TX_Program: DB 0FFh ; EEPROM TX programming enable_Eep_Main_Rearm_Start: DB 0FFh_Eep_Pgm_Gov_Setup_Target: DB 0FFh_Eep_Pgm_Startup_Rpm: DB 0FFh_Eep_Pgm_Startup_Accel: DB 0FFh_Eep_Pgm_Volt_Comp: DB 0FFhEep_Pgm_Comm_Timing: DB DEFAULT_PGM_COMM_TIMING ; EEPROM copy of programmed commutation timing_Eep_Pgm_Damping_Force: DB 0FFh_Eep_Pgm_Gov_Range: DB 0FFh_Eep_Pgm_Startup_Method: DB 0FFh_Eep_Pgm_Min_Throttle: DB 0FFh ; EEPROM copy of programmed minimum throttle_Eep_Pgm_Max_Throttle: DB 0FFh ; EEPROM copy of programmed minimum throttleEep_Pgm_Beep_Strength: DB DEFAULT_PGM_BEEP_STRENGTH ; EEPROM copy of programmed beep strengthEep_Pgm_Beacon_Strength: DB DEFAULT_PGM_BEACON_STRENGTH ; EEPROM copy of programmed beacon strengthEep_Pgm_Beacon_Delay: DB DEFAULT_PGM_BEACON_DELAY ; EEPROM copy of programmed beacon delay_Eep_Pgm_Throttle_Rate: DB 0FFhEep_Pgm_Demag_Comp: DB DEFAULT_PGM_DEMAG_COMP ; EEPROM copy of programmed demag compensation_Eep_Pgm_BEC_Voltage_High: DB 0FFh_Eep_Pgm_Center_Throttle: DB 0FFh ; EEPROM copy of programmed center throttle_Eep_Pgm_Main_Spoolup_Time: DB 0FFhEep_Pgm_Temp_Prot_Enable: DB DEFAULT_PGM_ENABLE_TEMP_PROT ; EEPROM copy of programmed temperature protection enable_Eep_Pgm_Enable_Power_Prot: DB 0FFh ; EEPROM copy of programmed low rpm power protection enable_Eep_Pgm_Enable_Pwm_Input: DB 0FFh_Eep_Pgm_Pwm_Dither: DB 0FFhEep_Pgm_Brake_On_Stop: DB DEFAULT_PGM_BRAKE_ON_STOP ; EEPROM copy of programmed braking when throttle is zeroEep_Pgm_LED_Control: DB DEFAULT_PGM_LED_CONTROL ; EEPROM copy of programmed LED control
Eep_Dummy: DB 0FFh ; EEPROM address for safety reason
CSEG AT 1A60hEep_Name: DB "Bluejay (BETA) " ; Name tag (16 Bytes)
;**** **** **** **** ****Interrupt_Table_Definition ; SiLabs interruptsCSEG AT 80h ; Code segment after interrupt vectors
;**** **** **** **** ****; Table definitions; Rampup pwm power (8-bit);STARTUP_POWER_TABLE: DB 1, 2, 3, 4, 6, 9, 12, 18, 25, 37, 50, 62, 75
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Macros;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
DSHOT_TLM_CLOCK EQU 24500000 ; 24.5MHzDSHOT_TLM_START_DELAY EQU -(5 * 25 / 4) ; Start telemetry after 5 us (~30 us after receiving DShot cmd)DSHOT_TLM_PREDELAY EQU 7 ; 7 timer 0 ticks inherent delay
IF MCU_48MHZ == 1 DSHOT_TLM_CLOCK_48 EQU 49000000 ; 49MHz DSHOT_TLM_START_DELAY_48 EQU -(16 * 49 / 4) ; Start telemetry after 16 us (~30 us after receiving DShot cmd) DSHOT_TLM_PREDELAY_48 EQU 11 ; 11 timer 0 ticks inherent delayENDIF
Set_DShot_Tlm_Bitrate MACRO rate mov DShot_GCR_Pulse_Time_1, #(DSHOT_TLM_PREDELAY - (1 * DSHOT_TLM_CLOCK / 4 / rate)) mov DShot_GCR_Pulse_Time_2, #(DSHOT_TLM_PREDELAY - (2 * DSHOT_TLM_CLOCK / 4 / rate)) mov DShot_GCR_Pulse_Time_3, #(DSHOT_TLM_PREDELAY - (3 * DSHOT_TLM_CLOCK / 4 / rate))
mov DShot_GCR_Start_Delay, #DSHOT_TLM_START_DELAY
IF MCU_48MHZ == 1 mov DShot_GCR_Pulse_Time_1_Tmp, #(DSHOT_TLM_PREDELAY_48 - (1 * DSHOT_TLM_CLOCK_48 / 4 / rate)) mov DShot_GCR_Pulse_Time_2_Tmp, #(DSHOT_TLM_PREDELAY_48 - (2 * DSHOT_TLM_CLOCK_48 / 4 / rate)) mov DShot_GCR_Pulse_Time_3_Tmp, #(DSHOT_TLM_PREDELAY_48 - (3 * DSHOT_TLM_CLOCK_48 / 4 / rate))ENDIFENDM
; DShot GCR encoding, adjust time by adding to previous itemGCR_Add_Time MACRO reg mov B, @reg mov A, DShot_GCR_Pulse_Time_2 cjne A, B, ($+5) mov A, DShot_GCR_Pulse_Time_3 mov @reg, AENDM
; Prepare telemetry packet while waiting for timer 3 to wrapWait_For_Timer3 MACROLOCAL wait_for_t3 done_waiting jb Flag_Telemetry_Pending, wait_for_t3
jnb Flag_Timer3_Pending, done_waiting call dshot_tlm_create_packet
wait_for_t3: jnb Flag_Timer3_Pending, done_waiting sjmp wait_for_t3
done_waiting:ENDM
; Used for subdividing the DShot telemetry routine into chunks,; that will return if timer 3 has wrappedEarly_Return_Packet_Stage MACRO num Early_Return_Packet_Stage_ num, %(num + 1)ENDM
Early_Return_Packet_Stage_ MACRO num nextIF num > 0 inc Temp5 ;; Increment current packet stage jb Flag_Timer3_Pending, dshot_packet_stage_&num ;; Return early if timer 3 has wrapped pop PSW retdshot_packet_stage_&num:ENDIFIF num < 5 cjne Temp5, #(num), dshot_packet_stage_&next ;; If this is not current stage, skip to nextENDIFENDM
Decode_DShot_2Bit MACRO dest, decode_fail movx A, @Temp1 mov Temp7, A clr C subb A, Temp6 ;; Subtract previous timestamp clr C subb A, Temp2 jc decode_fail ;; Check that bit is longer than minimum
subb A, Temp2 ;; Check if bit is zero or one rlca dest ;; Shift bit into data byte inc Temp1 ;; Next bit
movx A, @Temp1 mov Temp6, A clr C subb A, Temp7 clr C subb A, Temp2 jc decode_fail
subb A, Temp2 rlca dest inc Temp1ENDM
;**** **** **** **** ****; Compound instructions for conveniencexcha MACRO var1, var2 ;; Exchange via accumulator mov A, var1 xch A, var2 mov var1, AENDM
rrca MACRO var ;; Rotate right through carry via accumulator mov A, var rrc A mov var, AENDM
rlca MACRO var ;; Rotate left through carry via accumulator mov A, var rlc A mov var, AENDM
rla MACRO var ;; Rotate left via accumulator mov A, var rl A mov var, AENDM
ljc MACRO label ;; Long jump if carry setLOCAL skip jnc skip jmp labelskip:ENDM
imov MACRO reg, val ;; Increment pointer register and move inc reg mov @reg, val ;; Write value to memory address pointed to by registerENDM
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Interrupt handlers;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Timer 0 interrupt routine (High priority);; Generate DShot telemetry signal;; Requirements:; - Must NOT be called while Flag_Telemetry_Pending is cleared; - Must NOT write to Temp5, Temp8;**** **** **** **** **** **** **** **** **** **** **** **** ****t0_int: push PSW mov PSW, #10h ; Select register bank 2 for this interrupt
dec Temp1 cjne Temp1, #(Temp_Storage - 1), t0_int_dshot_tlm_transition
inc Temp1 ; Set pointer to uncritical position
; If last pulse is high, telemetry is finished, ; otherwise wait for it to return to high jb RTX_PORT.RTX_PIN, t0_int_dshot_tlm_finish
t0_int_dshot_tlm_transition: cpl RTX_PORT.RTX_PIN ; Invert signal level
mov TL0, @Temp1 ; Schedule next update
pop PSW reti
t0_int_dshot_tlm_finish: ; Configure RTX_PIN for digital input anl RTX_MDOUT, #(NOT (1 SHL RTX_PIN)) ; Set RTX_PIN output mode to open-drain setb RTX_PORT.RTX_PIN ; Float high
clr IE_ET0 ; Disable timer 0 interrupts
mov CKCON0, Temp8 ; Restore regular DShot timer 0/1 clock settings mov TMOD, #0AAh ; Timer 0/1 gated by INT0/1
clr TCON_IE0 ; Clear int0 pending flag clr TCON_IE1 ; Clear int1 pending flag
mov TL0, #0 ; Reset timer 0 count setb IE_EX0 ; Enable int0 interrupts setb IE_EX1 ; Enable int1 interrupts Enable_PCA_Interrupt ; Enable pca interrupts
clr Flag_Telemetry_Pending ; Mark that new telemetry packet may be created
pop PSW reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Timer 1 interrupt routine;; Decode DShot frame; Process new throttle value and update pwm registers; Schedule DShot telemetry;;**** **** **** **** **** **** **** **** **** **** **** **** ****t1_int: clr IE_EX0 ; Disable int0 interrupts clr TCON_TR1 ; Stop timer 1 mov TL1, DShot_Timer_Preset ; Reset sync timer
push PSW mov PSW, #8h ; Select register bank 1 for this interrupt push ACC push B
clr TMR2CN0_TR2 ; Timer 2 disabled mov Temp2, TMR2L ; Read timer value mov Temp3, TMR2H setb TMR2CN0_TR2 ; Timer 2 enabled
; Check frame time length clr C mov A, Temp2 subb A, DShot_Frame_Start_L mov Temp2, A mov A, Temp3 subb A, DShot_Frame_Start_H jnz t1_int_frame_fail ; Frame too long
clr C mov A, Temp2 subb A, DShot_Frame_Length_Thr jc t1_int_frame_fail ; Frame too short subb A, DShot_Frame_Length_Thr jnc t1_int_frame_fail ; Frame too long
; Check that correct number of pulses is received cjne Temp1, #16, t1_int_frame_fail ; Read current pointer
; Decode transmitted data mov Temp1, #0 ; Set pointer mov Temp2, DShot_Pwm_Thr ; DShot pulse width criteria mov Temp6, #0 ; Reset timestamp
; Decode DShot data Msb. Use more code space to save time (by not using loop) Decode_DShot_2Bit Temp5, t1_int_frame_fail Decode_DShot_2Bit Temp5, t1_int_frame_fail sjmp t1_int_decode_lsb
t1_int_frame_fail: sjmp t1_int_outside_range
t1_int_decode_lsb: ; Decode DShot data Lsb Decode_DShot_2Bit Temp4, t1_int_outside_range Decode_DShot_2Bit Temp4, t1_int_outside_range Decode_DShot_2Bit Temp4, t1_int_outside_range Decode_DShot_2Bit Temp4, t1_int_outside_range sjmp t1_int_decode_checksum
t1_int_outside_range: inc Rcp_Outside_Range_Cnt mov A, Rcp_Outside_Range_Cnt jnz ($+4) dec Rcp_Outside_Range_Cnt
clr C mov A, Rcp_Outside_Range_Cnt subb A, #50 ; Allow a given number of outside pulses jc t1_int_exit_timeout ; If outside limits - ignore first pulses
setb Flag_Rcp_Stop ; Set pulse length to zero clr A mov DShot_Cmd, A ; Clear DShot command mov DShot_Cmd_Cnt, A ; Clear DShot command count
ajmp t1_int_exit_no_tlm ; Exit without resetting timeout
t1_int_exit_timeout: mov Rcp_Timeout_Cntd, #10 ; Set timeout count ajmp t1_int_exit_no_tlm
t1_int_decode_checksum: ; Decode DShot data checksum Decode_DShot_2Bit Temp3, t1_int_outside_range Decode_DShot_2Bit Temp3, t1_int_outside_range
; XOR check (in inverted data, which is ok), only low nibble is considered mov A, Temp4 swap A xrl A, Temp4 xrl A, Temp5 xrl A, Temp3 jnb Flag_Rcp_DShot_Inverted, ($+4) cpl A ; Invert checksum if using inverted DShot anl A, #0Fh jnz t1_int_outside_range ; XOR check
; Invert DShot data and subtract 96 (still 12 bits) clr C mov A, Temp4 cpl A mov Temp3, A subb A, #96 mov Temp4, A mov A, Temp5 cpl A anl A, #0Fh subb A, #0 mov Temp5, A jnc t1_normal_range
mov A, Temp3 ; Check for 0 or DShot command mov Temp5, #0 mov Temp4, #0 jz t1_normal_range
mov Temp3, #0 clr C ; We are in the special DShot range rrc A ; Divide by 2 jnc t1_dshot_set_cmd ; Check for tlm bit set (if not telemetry, Temp3 will be zero and result in invalid command)
mov Temp3, A cjne A, DShot_Cmd, t1_dshot_set_cmd
inc DShot_Cmd_Cnt sjmp t1_normal_range
t1_dshot_set_cmd: mov DShot_Cmd, Temp3 mov DShot_Cmd_Cnt, #0
t1_normal_range: ; Check for bidirectional operation (0=stop, 96-2095->fwd, 2096-4095->rev) jnb Flag_Pgm_Bidir, t1_int_not_bidir ; If not bidirectional operation - branch
; Subtract 2000 (still 12 bits) clr C mov A, Temp4 subb A, #0D0h mov B, A mov A, Temp5 subb A, #07h clr Flag_Rcp_Dir_Rev jc t1_int_bidir_rev_chk ; If result is negative - branch
mov Temp4, B mov Temp5, A
setb Flag_Rcp_Dir_Rev
t1_int_bidir_rev_chk: jb Flag_Pgm_Bidir_Rev, ($+5) cpl Flag_Rcp_Dir_Rev
clr C ; Multiply throttle value by 2 rlca Temp4 rlca Temp5
t1_int_not_bidir: ; From here Temp5/Temp4 should be at most 3999 (4095-96) mov A, Temp4 ; Divide by 16 (12 to 8-bit) anl A, #0F0h orl A, Temp5 ; Note: Assumes Temp5 to be 4-bit swap A mov B, #5 ; Divide by 5 (80 in total) div AB mov Temp3, A ; Align to 11 bits ;clr C ; Note: Cleared by div rrca Temp5 mov A, Temp4 rrc A ; Scale from 2000 to 2048 add A, Temp3 mov Temp4, A mov A, Temp5 addc A, #0 mov Temp5, A jnb ACC.3, ($+7) ; Limit to 11-bit maximum mov Temp4, #0FFh mov Temp5, #07h
; Do not boost when changing direction in bidirectional mode jb Flag_Motor_Started, t1_int_startup_boosted
mov A, Flags_Startup ; Boost pwm during direct start jz t1_int_startup_boosted
mov A, Temp5 jnz t1_int_stall_boost ; Already more power than minimum at startup
mov Temp2, #Pgm_Startup_Power_Min ; Read minimum startup power setting mov B, @Temp2
clr C ; Set power to at least be minimum startup power mov A, Temp4 subb A, B jnc t1_int_stall_boost mov Temp4, B
t1_int_stall_boost: mov A, Startup_Stall_Cnt ; Check stall count jz t1_int_startup_boosted mov B, #40 ; Note: Stall count should be less than 6 mul AB
add A, Temp4 ; Add more power when failing to start motor (stalling) mov Temp4, A mov A, Temp5 addc A, #0 mov Temp5, A jnb ACC.3, ($+7) ; Limit to 11-bit maximum mov Temp4, #0FFh mov Temp5, #07h
t1_int_startup_boosted: ; Set 8-bit value mov A, Temp4 anl A, #0F8h orl A, Temp5 ; Assumes Temp5 to be 3-bit (11-bit rcp) swap A rl A mov Temp2, A
jnz t1_int_rcp_not_zero
mov A, Temp4 ; Only set Rcp_Stop if all all 11 bits are zero jnz t1_int_rcp_not_zero
setb Flag_Rcp_Stop sjmp t1_int_zero_rcp_checked
t1_int_rcp_not_zero: mov Rcp_Stop_Cnt, #0 ; Reset rcp stop counter clr Flag_Rcp_Stop ; Pulse ready
t1_int_zero_rcp_checked: ; Decrement outside range counter mov A, Rcp_Outside_Range_Cnt jz ($+4) dec Rcp_Outside_Range_Cnt
; Set pwm limit clr C mov A, Pwm_Limit ; Limit to the smallest mov Temp6, A ; Store limit in Temp6 subb A, Pwm_Limit_By_Rpm jc ($+4) mov Temp6, Pwm_Limit_By_Rpm
; Check against limit clr C mov A, Temp6 subb A, Temp2 ; 8-bit rc pulse jnc t1_int_scale_pwm_resolution
IF PWM_BITS_H == 0 ; 8-bit pwm mov A, Temp6 mov Temp2, AELSE mov A, Temp6 ; Multiply limit by 8 for 11-bit pwm mov B, #8 mul AB mov Temp4, A mov Temp5, BENDIF
t1_int_scale_pwm_resolution:; Scale pwm resolution and invert (duty cycle is defined inversely)IF PWM_BITS_H == 3 ; 11-bit pwm mov A, Temp5 cpl A anl A, #7 mov Temp3, A mov A, Temp4 cpl A mov Temp2, AELSEIF PWM_BITS_H == 2 ; 10-bit pwm clr C mov A, Temp5 rrc A cpl A anl A, #3 mov Temp3, A mov A, Temp4 rrc A cpl A mov Temp2, AELSEIF PWM_BITS_H == 1 ; 9-bit pwm mov B, Temp5 mov A, Temp4 mov C, B.0 rrc A mov C, B.1 rrc A cpl A mov Temp2, A mov A, Temp5 rr A rr A cpl A anl A, #1 mov Temp3, AELSEIF PWM_BITS_H == 0 ; 8-bit pwm mov A, Temp2 ; Temp2 already 8-bit cpl A mov Temp2, A mov Temp3, #0ENDIF
; 11-bit effective dithering of 8/9/10-bit pwmIF PWM_BITS_H < 3 jnb Flag_Dithering, t1_int_set_pwm
mov A, Temp4 ; 11-bit low byte cpl A anl A, #((1 SHL (3 - PWM_BITS_H)) - 1); Get index into dithering pattern table
add A, #Dithering_Patterns mov Temp1, A ; Reuse DShot pwm pointer since it is not currently in use. mov A, @Temp1 ; Retrieve pattern rl A ; Rotate pattern mov @Temp1, A ; Store pattern
jnb ACC.0, t1_int_set_pwm ; Increment if bit is set
mov A, Temp2 add A, #1 mov Temp2, A jnz t1_int_set_pwmIF PWM_BITS_H != 0 mov A, Temp3 addc A, #0 mov Temp3, A jnb ACC.PWM_BITS_H, t1_int_set_pwm dec Temp3 ; Reset on overflowENDIF dec Temp2ENDIF
t1_int_set_pwm:; Set pwm registersIF FETON_DELAY != 0 clr C mov A, Temp2 ; Skew damping fet timingIF MCU_48MHZ == 0 subb A, #((FETON_DELAY + 1) SHR 1)ELSE subb A, #(FETON_DELAY)ENDIF mov Temp4, A mov A, Temp3 subb A, #0 mov Temp5, A jnc t1_int_set_pwm_damp_set
clr A ; Set to minimum value mov Temp4, A mov Temp5, A
t1_int_set_pwm_damp_set:ENDIF
mov Power_Pwm_Reg_L, Temp2 mov Power_Pwm_Reg_H, Temp3
IF FETON_DELAY != 0 mov Damp_Pwm_Reg_L, Temp4 mov Damp_Pwm_Reg_H, Temp5ENDIF
mov Rcp_Timeout_Cntd, #10 ; Set timeout count
; Prepare DShot telemetry jnb Flag_Rcp_DShot_Inverted, t1_int_exit_no_tlm ; Only send telemetry for inverted DShot jnb Flag_Telemetry_Pending, t1_int_exit_no_tlm ; Check if telemetry packet is ready
; Prepare timer 0 for sending telemetry data mov CKCON0, #01h ; Timer 0 is system clock divided by 4 mov TMOD, #0A2h ; Timer 0 runs free not gated by INT0
; Configure RTX_PIN for digital output setb RTX_PORT.RTX_PIN ; Default to high level orl RTX_MDOUT, #(1 SHL RTX_PIN) ; Set output mode to push-pull
mov Temp1, #0 ; Set pointer to start
; Note: Delay must be large enough to ensure port is ready for output mov TL0, DShot_GCR_Start_Delay ; Telemetry will begin after this delay clr TCON_TF0 ; Clear timer 0 overflow flag setb IE_ET0 ; Enable timer 0 interrupts
sjmp t1_int_exit_no_int
t1_int_exit_no_tlm: mov Temp1, #0 ; Set pointer to start mov TL0, #0 ; Reset timer 0 setb IE_EX0 ; Enable int0 interrupts setb IE_EX1 ; Enable int1 interrupts Enable_PCA_Interrupt ; Enable pca interrupts
t1_int_exit_no_int: pop B ; Restore preserved registers pop ACC pop PSW reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Timer 2 interrupt routine;; Update RC pulse timeout and stop counters; Happens every 32ms; Requirements: Temp variables can NOT be used since PSW.x is not set;;**** **** **** **** **** **** **** **** **** **** **** **** ****t2_int: push ACC clr TMR2CN0_TF2H ; Clear interrupt flag inc Timer2_X
IF MCU_48MHZ == 1 jnb Flag_Clock_At_48MHz, t2_int_start ; Always run if clock is 24MHz
jbc Flag_Skip_Timer2_Int, t2_int_exit ; Flag set? - Skip interrupt and clear flag
t2_int_start: setb Flag_Skip_Timer2_Int ; Skip next interruptENDIF ; Update RC pulse timeout counter mov A, Rcp_Timeout_Cntd ; RC pulse timeout count zero? jz ($+4) ; Yes - do not decrement dec Rcp_Timeout_Cntd ; No - decrement
jnb Flag_Rcp_Stop, t2_int_exit ; Exit if pulse is above stop value
; Update RC pulse stop counter inc Rcp_Stop_Cnt ; Increment stop counter mov A, Rcp_Stop_Cnt jnz ($+4) ; Branch if counter has not wrapped dec Rcp_Stop_Cnt ; Set stop counter back to max
t2_int_exit: pop ACC ; Restore preserved registers reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Timer 3 interrupt routine;; Used for commutation timing; Requirements: Temp variables can NOT be used since PSW.x is not set; ACC can not be used, as it is not pushed to stack;;**** **** **** **** **** **** **** **** **** **** **** **** ****t3_int: clr IE_EA ; Disable all interrupts anl EIE1, #7Fh ; Disable timer 3 interrupts anl TMR3CN0, #07Fh ; Clear timer 3 interrupt flag mov TMR3RLL, #0FAh ; Set a short delay before next interrupt mov TMR3RLH, #0FFh clr Flag_Timer3_Pending ; Flag that timer has wrapped setb IE_EA ; Enable all interrupts reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Int0 interrupt routine (High priority);; Read and store DShot pwm signal for decoding;;**** **** **** **** **** **** **** **** **** **** **** **** ****int0_int: push ACC mov A, TL0 ; Read pwm for DShot immediately mov TL1, DShot_Timer_Preset ; Reset sync timer
; Temp1 in register bank 1 points to pwm timings push PSW mov PSW, #8h movx @Temp1, A ; Store pwm inc Temp1 pop PSW
pop ACC reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Int1 interrupt routine;; Used for RC pulse timing;;**** **** **** **** **** **** **** **** **** **** **** **** ****int1_int: clr IE_EX1 ; Disable int1 interrupts setb TCON_TR1 ; Start timer 1 clr TMR2CN0_TR2 ; Timer 2 disabled mov DShot_Frame_Start_L, TMR2L ; Read timer value mov DShot_Frame_Start_H, TMR2H setb TMR2CN0_TR2 ; Timer 2 enabledreti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; PCA interrupt routine;; Update pwm registers according to PCA clock signal;; Requirements: Temp variables can NOT be used since PSW.x is not set;;**** **** **** **** **** **** **** **** **** **** **** **** ****pca_int: clr IE_EA ; Disable all interrupts push ACC
IF FETON_DELAY != 0 ; HI/LO enable style drivers mov A, PCA0L ; Read low byte first, to transfer high byte to holding register mov A, PCA0H
jnb Flag_Low_Pwm_Power, pca_int_hi_pwm
; Power below 50%, update pca in the 0x00-0x0F range jb ACC.PWM_BITS_H, pca_int_exit ; PWM edge selection bit (continue if up edge)
sjmp pca_int_set_pwm
pca_int_hi_pwm: ; Power above 50%, update pca in the 0x20-0x2F range jnb ACC.PWM_BITS_H, pca_int_exit ; PWM edge selection bit (continue if down edge)
pca_int_set_pwm: IF PWM_BITS_H != 0 jb ACC.(PWM_BITS_H-1), pca_int_exit ELSE mov A, PCA0L jb ACC.7, pca_int_exit ENDIFENDIF
; Set power pwm auto-reload registersIF PWM_BITS_H != 0 mov PCA0_POWER_L, Power_Pwm_Reg_L mov PCA0_POWER_H, Power_Pwm_Reg_HELSE mov PCA0_POWER_H, Power_Pwm_Reg_LENDIF
IF FETON_DELAY != 0 ; Set damp pwm auto-reload registers IF PWM_BITS_H != 0 mov PCA0_DAMP_L, Damp_Pwm_Reg_L mov PCA0_DAMP_H, Damp_Pwm_Reg_H ELSE mov PCA0_DAMP_H, Damp_Pwm_Reg_L ENDIFENDIF
setb Flag_Low_Pwm_PowerIF PWM_BITS_H != 0 mov A, Power_Pwm_Reg_H jb ACC.(PWM_BITS_H - 1), ($+5)ELSE mov A, Power_Pwm_Reg_L jb ACC.7, ($+5)ENDIF clr Flag_Low_Pwm_Power
Disable_COVF_InterruptIF FETON_DELAY == 0 ; EN/PWM style drivers Disable_CCF_InterruptENDIF
anl EIE1, #0EFh ; Pwm updated, disable pca interrupts
pca_int_exit: Clear_COVF_InterruptIF FETON_DELAY == 0 Clear_CCF_InterruptENDIF
pop ACC ; Restore preserved registers setb IE_EA ; Enable all interrupts reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Misc utility functions;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Wait a number of milliseconds (Multiple entry points);;**** **** **** **** **** **** **** **** **** **** **** **** ****wait1ms: mov Temp2, #1 sjmp wait_ms_o
wait5ms: mov Temp2, #5 sjmp wait_ms_o
wait10ms: mov Temp2, #10 sjmp wait_ms_o
wait100ms: mov Temp2, #100 sjmp wait_ms_o
wait200ms: mov Temp2, #200 sjmp wait_ms_o
wait250ms: mov Temp2, #250 sjmp wait_ms_o
wait_ms_o: ; Outer loop mov Temp1, #23wait_ms_m: ; Middle loop clr A djnz ACC, $ ; Inner loop (41.8us - 1024 cycles) djnz Temp1, wait_ms_m djnz Temp2, wait_ms_o ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Beeper routines (Multiple entry points);;**** **** **** **** **** **** **** **** **** **** **** **** ****beep_f1: mov Temp3, #66 ; Off wait loop length (Tone) mov Temp4, #(3500 / 66) ; Number of beep pulses (Duration) sjmp beep
beep_f2: mov Temp3, #45 mov Temp4, #(3500 / 45) sjmp beep
beep_f3: mov Temp3, #38 mov Temp4, #(3500 / 38) sjmp beep
beep_f4: mov Temp3, #25 mov Temp4, #(3500 / 25) sjmp beep
beep_f5: mov Temp3, #20 mov Temp4, #(3500 / 20) sjmp beep
beep_f1_short: mov Temp3, #66 mov Temp4, #(2000 / 66) sjmp beep
beep_f2_short: mov Temp3, #45 mov Temp4, #(2000 / 45) sjmp beep
beep: mov A, Beep_Strength jnz beep_start ; Start if beep strength is not 0 ret
beep_start: mov Temp2, #2
beep_onoff: clr A BcomFET_off ; BcomFET off djnz ACC, $ ; Allow some time after comfet is turned off BpwmFET_on ; BpwmFET on (in order to charge the driver of the BcomFET) djnz ACC, $ ; Let the pwmfet be turned on a while BpwmFET_off ; BpwmFET off again djnz ACC, $ ; Allow some time after pwmfet is turned off BcomFET_on ; BcomFET on djnz ACC, $ ; Allow some time after comfet is turned on
mov A, Temp2 ; Turn on pwmfet jb ACC.0, beep_apwmfet_on ApwmFET_onbeep_apwmfet_on: jnb ACC.0, beep_cpwmfet_on CpwmFET_onbeep_cpwmfet_on:
mov A, Beep_Strength ; On time according to beep strength djnz ACC, $
mov A, Temp2 ; Turn off pwmfet jb ACC.0, beep_apwmfet_off ApwmFET_offbeep_apwmfet_off: jnb ACC.0, beep_cpwmfet_off CpwmFET_offbeep_cpwmfet_off:
mov A, #150 ; Off for 25 us djnz ACC, $
djnz Temp2, beep_onoff ; Toggle next pwmfet
mov A, Temp3beep_off: ; Fets off loop mov Temp1, #200 djnz Temp1, $ djnz ACC, beep_off ; Off time according to beep frequency
djnz Temp4, beep_start ; Number of beep pulses (duration)
BcomFET_off ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; LED control;; Controls LEDs;;**** **** **** **** **** **** **** **** **** **** **** **** ****led_control: mov Temp1, #Pgm_LED_Control mov A, @Temp1 mov Temp2, A anl A, #03h Set_LED_0 jnz led_0_done Clear_LED_0led_0_done: mov A, Temp2 anl A, #0Ch Set_LED_1 jnz led_1_done Clear_LED_1led_1_done: mov A, Temp2 anl A, #030h Set_LED_2 jnz led_2_done Clear_LED_2led_2_done: mov A, Temp2 anl A, #0C0h Set_LED_3 jnz led_3_done Clear_LED_3led_3_done: ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Power and temperature control;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Switch power off routine;; Switches all fets off;;**** **** **** **** **** **** **** **** **** **** **** **** ****switch_power_off: All_pwmFETs_Off ; Turn off all pwm fets All_comFETs_Off ; Turn off all commutation fets Set_Pwms_Off ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Set pwm limit low rpm;; Sets power limit for low rpm;;**** **** **** **** **** **** **** **** **** **** **** **** ****set_pwm_limit: jb Flag_High_Rpm, set_pwm_limit_high_rpm ; If high rpm, limit pwm by rpm instead
;set_pwm_limit_low_rpm: ; Set pwm limit mov Temp1, #0FFh ; Default full power jb Flag_Startup_Phase, set_pwm_limit_low_rpm_exit ; Exit if startup phase set
mov A, Low_Rpm_Pwr_Slope ; Check if low RPM power protection is enabled jz set_pwm_limit_low_rpm_exit ; Exit if disabled (zero)
mov A, Comm_Period4x_H jz set_pwm_limit_low_rpm_exit ; Avoid divide by zero
mov A, #255 ; Divide 255 by Comm_Period4x_H jnb Flag_Initial_Run_Phase, ($+5) ; More protection for initial run phase mov A, #127 mov B, Comm_Period4x_H div AB mov B, Low_Rpm_Pwr_Slope ; Multiply by slope mul AB mov Temp1, A ; Set new limit xch A, B jz ($+4) ; Limit to max
mov Temp1, #0FFh
clr C mov A, Temp1 ; Limit to min subb A, Pwm_Limit_Beg jnc set_pwm_limit_low_rpm_exit
mov Temp1, Pwm_Limit_Beg
set_pwm_limit_low_rpm_exit: mov Pwm_Limit_By_Rpm, Temp1 ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Set pwm limit high rpm;; Sets power limit for high rpm;;**** **** **** **** **** **** **** **** **** **** **** **** ****set_pwm_limit_high_rpm: clr C mov A, Comm_Period4x_LIF MCU_48MHZ == 1 subb A, #0A0h ; Limit Comm_Period to 160, which is 500k erpmELSE subb A, #0E4h ; Limit Comm_Period to 228, which is 350k erpmENDIF mov A, Comm_Period4x_H subb A, #00h
mov A, Pwm_Limit_By_Rpm jnc set_pwm_limit_high_rpm_inc_limit
dec A sjmp set_pwm_limit_high_rpm_store
set_pwm_limit_high_rpm_inc_limit: inc A
set_pwm_limit_high_rpm_store: jz ($+4) mov Pwm_Limit_By_Rpm, A
ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Check motor temperature and limit power;;**** **** **** **** **** **** **** **** **** **** **** **** ****check_temp_and_limit_power: inc Adc_Conversion_Cnt ; Increment conversion counter clr C mov A, Adc_Conversion_Cnt ; Is conversion count equal to temp rate? subb A, #8 jc temp_increase_pwm_limit ; No - increase pwm limit
; Wait for ADC conversion to complete jnb ADC0CN0_ADINT, check_temp_and_limit_power ; Read ADC result Read_Adc_Result ; Stop ADC Stop_Adc
mov Adc_Conversion_Cnt, #0 ; Yes - temperature check. Reset counter mov A, Temp2 ; Move ADC MSB to Temp3 mov Temp3, A mov Temp2, #Pgm_Enable_Temp_Prot ; Is temp protection enabled? mov A, @Temp2 jz temp_check_exit ; No - branch
mov A, Temp3 ; Is temperature reading below 256? jnz temp_average_inc_dec ; No - proceed
mov A, Current_Average_Temp ; Yes - decrement average jz temp_average_updated ; Already zero - no change sjmp temp_average_dec ; Decrement
temp_average_inc_dec: clr C mov A, Temp1 ; Check if current temperature is above or below average subb A, Current_Average_Temp jz temp_average_updated_load_acc ; Equal - no change
mov A, Current_Average_Temp ; Above - increment average jnc temp_average_inc
jz temp_average_updated ; Below - decrement average if average is not already zerotemp_average_dec: dec A ; Decrement average sjmp temp_average_updated
temp_average_inc: inc A ; Increment average jz temp_average_dec sjmp temp_average_updated
temp_average_updated_load_acc: mov A, Current_Average_Temptemp_average_updated: mov Current_Average_Temp, A clr C subb A, Temp_Prot_Limit ; Is temperature below first limit? jc temp_check_exit ; Yes - exit
mov Pwm_Limit, #192 ; No - limit pwm
clr C subb A, #(TEMP_LIMIT_STEP / 2) ; Is temperature below second limit jc temp_check_exit ; Yes - exit
mov Pwm_Limit, #128 ; No - limit pwm
clr C subb A, #(TEMP_LIMIT_STEP / 2) ; Is temperature below third limit jc temp_check_exit ; Yes - exit
mov Pwm_Limit, #64 ; No - limit pwm
clr C subb A, #(TEMP_LIMIT_STEP / 2) ; Is temperature below final limit jc temp_check_exit ; Yes - exit
mov Pwm_Limit, #0 ; No - limit pwm
temp_check_exit: ret
temp_increase_pwm_limit: mov A, Pwm_Limit add A, #16 ; Increase pwm limit jnc ($+4) ; Check if above maximum mov A, #255 ; Set maximum value
mov Pwm_Limit, A ; Set new pwm limit ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Commutation and timing;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Initialize timing routine;; Part of initialization before motor start;;**** **** **** **** **** **** **** **** **** **** **** **** ****initialize_timing: mov Comm_Period4x_L, #00h ; Set commutation period registers mov Comm_Period4x_H, #0F0h ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Calculate next commutation timing routine;; Called immediately after each commutation; Also sets up timer 3 to wait advance timing; Two entry points are used;;**** **** **** **** **** **** **** **** **** **** **** **** ****calc_next_comm_timing: ; Entry point for run phase ; Read commutation time clr IE_EA clr TMR2CN0_TR2 ; Timer 2 disabled mov Temp1, TMR2L ; Load timer 2 value mov Temp2, TMR2H mov Temp3, Timer2_X jnb TMR2CN0_TF2H, ($+4) ; Check if interrupt is pending inc Temp3 ; If it is pending, then timer has already wrapped setb TMR2CN0_TR2 ; Timer 2 enabled setb IE_EAIF MCU_48MHZ == 1 clr C rrca Temp3 rrca Temp2 rrca Temp1ENDIF ; Calculate this commutation time mov Temp4, Prev_Comm_L mov Temp5, Prev_Comm_H mov Prev_Comm_L, Temp1 ; Store timestamp as previous commutation mov Prev_Comm_H, Temp2 clr C mov A, Temp1 subb A, Temp4 ; Calculate the new commutation time mov Temp1, A mov A, Temp2 subb A, Temp5 jb Flag_Startup_Phase, calc_next_comm_startup
IF MCU_48MHZ == 1 anl A, #7FhENDIF mov Temp2, A jnb Flag_High_Rpm, calc_next_comm_normal ; Branch normal rpm ajmp calc_next_comm_timing_fast ; Branch high rpm
calc_next_comm_startup: mov Temp6, Prev_Comm_X mov Prev_Comm_X, Temp3 ; Store extended timestamp as previous commutation mov Temp2, A mov A, Temp3 subb A, Temp6 ; Calculate the new extended commutation timeIF MCU_48MHZ == 1 anl A, #7FhENDIF mov Temp3, A jz calc_next_comm_startup_no_X
mov Temp1, #0FFh mov Temp2, #0FFh sjmp calc_next_comm_startup_average
calc_next_comm_startup_no_X: mov Temp7, Prev_Prev_Comm_L mov Temp8, Prev_Prev_Comm_H mov Prev_Prev_Comm_L, Temp4 mov Prev_Prev_Comm_H, Temp5 mov Temp1, Prev_Comm_L ; Reload this commutation time mov Temp2, Prev_Comm_H
; Calculate the new commutation time based upon the two last commutations (to reduce sensitivity to offset) clr C mov A, Temp1 subb A, Temp7 mov Temp1, A mov A, Temp2 subb A, Temp8 mov Temp2, A
calc_next_comm_startup_average: clr C mov A, Comm_Period4x_H ; Average with previous and save rrc A mov Temp4, A mov A, Comm_Period4x_L rrc A mov Temp3, A mov A, Temp1 add A, Temp3 mov Comm_Period4x_L, A mov A, Temp2 addc A, Temp4 mov Comm_Period4x_H, A jnc ($+8)
mov Comm_Period4x_L, #0FFh mov Comm_Period4x_H, #0FFh
sjmp calc_new_wait_times_setup
calc_next_comm_normal: ; Calculate new commutation time mov Temp3, Comm_Period4x_L ; Comm_Period4x(-l-h) holds the time of 4 commutations mov Temp4, Comm_Period4x_H mov Temp5, Comm_Period4x_L ; Copy variables mov Temp6, Comm_Period4x_H mov Temp7, #4 ; Divide Comm_Period4x 4 times as default mov Temp8, #2 ; Divide new commutation time 2 times as default clr C mov A, Temp4 subb A, #04h jc calc_next_comm_avg_period_div
dec Temp7 ; Reduce averaging time constant for low speeds dec Temp8
clr C mov A, Temp4 subb A, #08h jc calc_next_comm_avg_period_div
jb Flag_Initial_Run_Phase, calc_next_comm_avg_period_div ; Do not average very fast during initial run
dec Temp7 ; Reduce averaging time constant more for even lower speeds dec Temp8
calc_next_comm_avg_period_div: clr C rrca Temp6 ; Divide by 2 rrca Temp5 djnz Temp7, calc_next_comm_avg_period_div
clr C mov A, Temp3 subb A, Temp5 ; Subtract a fraction mov Temp3, A mov A, Temp4 subb A, Temp6 mov Temp4, A mov A, Temp8 ; Divide new time jz calc_next_comm_new_period_div_done
calc_next_comm_new_period_div: clr C rrca Temp2 ; Divide by 2 rrca Temp1 djnz Temp8, calc_next_comm_new_period_div
calc_next_comm_new_period_div_done: mov A, Temp3 add A, Temp1 ; Add the divided new time mov Temp3, A mov A, Temp4 addc A, Temp2 mov Temp4, A mov Comm_Period4x_L, Temp3 ; Store Comm_Period4x_X mov Comm_Period4x_H, Temp4 jnc calc_new_wait_times_setup ; If period larger than 0xffff - go to slow case
mov Temp4, #0FFh mov Comm_Period4x_L, Temp4 ; Set commutation period registers to very slow timing (0xffff) mov Comm_Period4x_H, Temp4
calc_new_wait_times_setup: ; Set high rpm bit (if above 156k erpm) clr C mov A, Temp4 subb A, #2 jnc ($+4)
setb Flag_High_Rpm ; Set high rpm bit
; Load programmed commutation timing jnb Flag_Startup_Phase, calc_new_wait_per_startup_done ; Set dedicated timing during startup
mov Temp8, #3 sjmp calc_new_wait_per_demag_done
calc_new_wait_per_startup_done: mov Temp1, #Pgm_Comm_Timing ; Load timing setting mov A, @Temp1 mov Temp8, A ; Store in Temp8 clr C mov A, Demag_Detected_Metric ; Check demag metric subb A, #130 jc calc_new_wait_per_demag_done
inc Temp8 ; Increase timing
clr C mov A, Demag_Detected_Metric subb A, #160 jc ($+3)
inc Temp8 ; Increase timing again
clr C mov A, Temp8 ; Limit timing to max subb A, #6 jc ($+4)
mov Temp8, #5 ; Set timing to max
calc_new_wait_per_demag_done: ; Set timing reduction mov Temp7, #2 ; Load current commutation timing mov A, Comm_Period4x_H ; Divide 4 times swap A anl A, #00Fh mov Temp2, A mov A, Comm_Period4x_H swap A anl A, #0F0h mov Temp1, A mov A, Comm_Period4x_L swap A anl A, #00Fh add A, Temp1 mov Temp1, A
clr C mov A, Temp1 subb A, Temp7 mov Temp3, A mov A, Temp2 subb A, #0 mov Temp4, A jc load_min_time ; Check that result is still positive jnz calc_next_comm_timing_exit ; Check that result is still above minimum mov A, Temp3 jnz calc_next_comm_timing_exit
load_min_time: mov Temp3, #1 ; Set minimum time mov Temp4, #0
sjmp calc_next_comm_timing_exit
;**** **** **** **** ****; Calculate next commutation timing fast routine; Fast calculation (Comm_Period4x_H less than 2)calc_next_comm_timing_fast: ; Calculate new commutation time mov Temp3, Comm_Period4x_L ; Comm_Period4x(-l-h) holds the time of 4 commutations mov Temp4, Comm_Period4x_H mov A, Temp4 ; Divide by 2 4 times swap A mov Temp7, A mov A, Temp3 swap A anl A, #0Fh orl A, Temp7 mov Temp5, A clr C mov A, Temp3 ; Subtract a fraction subb A, Temp5 mov Temp3, A mov A, Temp4 subb A, #0 mov Temp4, A clr C mov A, Temp1 rrc A ; Divide by 2 2 times clr C rrc A mov Temp1, A mov A, Temp3 ; Add the divided new time add A, Temp1 mov Temp3, A mov A, Temp4 addc A, #0 mov Temp4, A mov Comm_Period4x_L, Temp3 ; Store Comm_Period4x_X mov Comm_Period4x_H, Temp4 clr C subb A, #2 ; If erpm below 156k - go to normal case jc ($+4)
clr Flag_High_Rpm ; Clear high rpm bit
; Set timing reduction mov Temp1, #2 mov A, Temp4 ; Divide by 2 4 times swap A mov Temp7, A mov Temp4, #0 mov A, Temp3 swap A anl A, #0Fh orl A, Temp7 mov Temp3, A clr C subb A, Temp1 mov Temp3, A jc load_min_time_fast ; Check that result is still positive jnz calc_new_wait_times_fast_done ; Check that result is still above minimum
load_min_time_fast: mov Temp3, #1 ; Set minimum time
calc_new_wait_times_fast_done: mov Temp1, #Pgm_Comm_Timing ; Load timing setting mov A, @Temp1 mov Temp8, A ; Store in Temp8
calc_next_comm_timing_exit:
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Wait advance timing routine; NOTE: Be VERY careful if using temp registers. They are passed over this routine;; Waits for the advance timing to elapse and sets up the next zero cross wait;;**** **** **** **** **** **** **** **** **** **** **** **** ****wait_advance_timing: Wait_For_Timer3
; Setup next wait time mov TMR3RLL, Wt_ZC_Tout_Start_L mov TMR3RLH, Wt_ZC_Tout_Start_H setb Flag_Timer3_Pending orl EIE1, #80h ; Enable timer 3 interrupts
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Calculate new wait times routine;; Calculates new wait times;;**** **** **** **** **** **** **** **** **** **** **** **** ****calc_new_wait_times: clr C clr A subb A, Temp3 ; Negate mov Temp1, A clr A subb A, Temp4 mov Temp2, AIF MCU_48MHZ == 1 clr C rlca Temp1 ; Multiply by 2 rlca Temp2ENDIF
jb Flag_High_Rpm, calc_new_wait_times_fast ; Branch if high rpm
mov A, Temp1 ; Copy values mov Temp3, A mov A, Temp2 mov Temp4, A setb C ; Negative numbers - set carry mov A, Temp2 rrc A ; Divide by 2 mov Temp6, A mov A, Temp1 rrc A mov Temp5, A mov Wt_Zc_Tout_Start_L, Temp1 ; Set 15deg time for zero cross scan timeout mov Wt_Zc_Tout_Start_H, Temp2 clr C mov A, Temp8 ; (Temp8 has Pgm_Comm_Timing) subb A, #3 ; Is timing normal? jz store_times_decrease ; Yes - branch
mov A, Temp8 jb ACC.0, adjust_timing_two_steps; If an odd number - branch
mov A, Temp1 ; Add 7.5deg and store in Temp1/2 add A, Temp5 mov Temp1, A mov A, Temp2 addc A, Temp6 mov Temp2, A mov A, Temp5 ; Store 7.5deg in Temp3/4 mov Temp3, A mov A, Temp6 mov Temp4, A sjmp store_times_up_or_down
adjust_timing_two_steps: mov A, Temp1 ; Add 15deg and store in Temp1/2 setb C ; Add 1 to final result (Temp1/2 * 2 + 1) addc A, Temp1 mov Temp1, A mov A, Temp2 addc A, Temp2 mov Temp2, A mov Temp3, #0FFh ; Store minimum time in Temp3/4 mov Temp4, #0FFh
store_times_up_or_down: clr C mov A, Temp8 subb A, #3 ; Is timing higher than normal? jc store_times_decrease ; No - branch
store_times_increase: mov Wt_Comm_Start_L, Temp3 ; Now commutation time (~60deg) divided by 4 (~15deg nominal) mov Wt_Comm_Start_H, Temp4 mov Wt_Adv_Start_L, Temp1 ; New commutation advance time (~15deg nominal) mov Wt_Adv_Start_H, Temp2 mov Wt_Zc_Scan_Start_L, Temp5 ; Use this value for zero cross scan delay (7.5deg) mov Wt_Zc_Scan_Start_H, Temp6 sjmp calc_new_wait_times_exit
store_times_decrease: mov Wt_Comm_Start_L, Temp1 ; Now commutation time (~60deg) divided by 4 (~15deg nominal) mov Wt_Comm_Start_H, Temp2 mov Wt_Adv_Start_L, Temp3 ; New commutation advance time (~15deg nominal) mov Wt_Adv_Start_H, Temp4 mov Wt_Zc_Scan_Start_L, Temp5 ; Use this value for zero cross scan delay (7.5deg) mov Wt_Zc_Scan_Start_H, Temp6
; Set very short delays for all but advance time during startup, in order to widen zero cross capture range jnb Flag_Startup_Phase, calc_new_wait_times_exit mov Wt_Comm_Start_L, #0F0h mov Wt_Comm_Start_H, #0FFh mov Wt_Zc_Scan_Start_L, #0F0h mov Wt_Zc_Scan_Start_H, #0FFh mov Wt_Zc_Tout_Start_L, #0F0h mov Wt_Zc_Tout_Start_H, #0FFh
sjmp calc_new_wait_times_exit
;**** **** **** **** ****; Calculate new wait times fast routinecalc_new_wait_times_fast: mov A, Temp1 ; Copy values mov Temp3, A setb C ; Negative numbers - set carry rrc A ; Divide by 2 mov Temp5, A mov Wt_Zc_Tout_Start_L, Temp1 ; Set 15deg time for zero cross scan timeout clr C mov A, Temp8 ; (Temp8 has Pgm_Comm_Timing) subb A, #3 ; Is timing normal? jz store_times_decrease_fast ; Yes - branch
mov A, Temp8 jb ACC.0, adjust_timing_two_steps_fast ; If an odd number - branch
mov A, Temp1 ; Add 7.5deg and store in Temp1 add A, Temp5 mov Temp1, A mov A, Temp5 ; Store 7.5deg in Temp3 mov Temp3, A sjmp store_times_up_or_down_fast
adjust_timing_two_steps_fast: mov A, Temp1 ; Add 15deg and store in Temp1 add A, Temp1 add A, #1 mov Temp1, A mov Temp3, #0FFh ; Store minimum time in Temp3
store_times_up_or_down_fast: clr C mov A, Temp8 subb A, #3 ; Is timing higher than normal? jc store_times_decrease_fast ; No - branch
store_times_increase_fast: mov Wt_Comm_Start_L, Temp3 ; Now commutation time (~60deg) divided by 4 (~15deg nominal) mov Wt_Adv_Start_L, Temp1 ; New commutation advance time (~15deg nominal) mov Wt_Zc_Scan_Start_L, Temp5 ; Use this value for zero cross scan delay (7.5deg) sjmp calc_new_wait_times_exit
store_times_decrease_fast: mov Wt_Comm_Start_L, Temp1 ; Now commutation time (~60deg) divided by 4 (~15deg nominal) mov Wt_Adv_Start_L, Temp3 ; New commutation advance time (~15deg nominal) mov Wt_Zc_Scan_Start_L, Temp5 ; Use this value for zero cross scan delay (7.5deg)
calc_new_wait_times_exit:
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Wait before zero cross scan routine;; Waits for the zero cross scan wait time to elapse; Also sets up timer 3 for the zero cross scan timeout time;;**** **** **** **** **** **** **** **** **** **** **** **** ****wait_before_zc_scan: Wait_For_Timer3
mov Startup_Zc_Timeout_Cntd, #2setup_zc_scan_timeout: setb Flag_Timer3_Pending orl EIE1, #80h ; Enable timer 3 interrupts mov A, Flags_Startup jz wait_before_zc_scan_exit
mov Temp1, Comm_Period4x_L ; Set long timeout when starting mov Temp2, Comm_Period4x_H clr C rrca Temp2 rrca Temp1IF MCU_48MHZ == 0 clr C rrca Temp2 rrca Temp1ENDIF jnb Flag_Startup_Phase, setup_zc_scan_timeout_startup_done
mov A, Temp2 add A, #40h ; Increase timeout somewhat to avoid false wind up mov Temp2, A
setup_zc_scan_timeout_startup_done: clr IE_EA anl EIE1, #7Fh ; Disable timer 3 interrupts mov TMR3CN0, #00h ; Timer 3 disabled and interrupt flag cleared clr C clr A subb A, Temp1 ; Set timeout mov TMR3L, A clr A subb A, Temp2 mov TMR3H, A mov TMR3CN0, #04h ; Timer 3 enabled and interrupt flag cleared setb Flag_Timer3_Pending orl EIE1, #80h ; Enable timer 3 interrupts setb IE_EA
wait_before_zc_scan_exit: ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Wait for comparator to go low/high routines;; Waits for the zero cross scan wait time to elapse; Then scans for comparator going low/high;;**** **** **** **** **** **** **** **** **** **** **** **** ****wait_for_comp_out_low: mov B, #00h ; Desired comparator output jnb Flag_Dir_Change_Brake, comp_init mov B, #40h sjmp comp_init
wait_for_comp_out_high: mov B, #40h ; Desired comparator output jnb Flag_Dir_Change_Brake, comp_init mov B, #00h
comp_init: setb Flag_Demag_Detected ; Set demag detected flag as default mov Comparator_Read_Cnt, #0 ; Reset number of comparator reads
comp_start: ; Set number of comparator readings mov Temp3, #(1 SHL MCU_48MHZ) ; Number of OK readings required mov Temp4, #(1 SHL MCU_48MHZ) ; Max number of readings required jb Flag_High_Rpm, comp_check_timeout ; Branch if high rpm
mov A, Flags_Startup ; Clear demag detected flag if start phases jz ($+4) clr Flag_Demag_Detected
jnb Flag_Startup_Phase, comp_not_startup mov Temp3, #(27 SHL MCU_48MHZ) ; Set many samples during startup, approximately one pwm period mov Temp4, #(27 SHL MCU_48MHZ) sjmp comp_check_timeout
comp_not_startup: ; Too low value (~<15) causes rough running at pwm harmonics. ; Too high a value (~>35) causes the RCT4215 630 to run rough on full throttle mov Temp4, #(20 SHL MCU_48MHZ) mov A, Comm_Period4x_H ; Set number of readings higher for lower speedsIF MCU_48MHZ == 0 clr C rrc AENDIF jnz ($+3) inc A ; Minimum 1 mov Temp3, A clr C subb A, #(20 SHL MCU_48MHZ) jc ($+4) mov Temp3, #(20 SHL MCU_48MHZ) ; Maximum 20
comp_check_timeout: jb Flag_Timer3_Pending, comp_check_timeout_not_timed_out ; Has zero cross scan timeout elapsed?
mov A, Comparator_Read_Cnt ; Check that comparator has been read jz comp_check_timeout_not_timed_out ; If not read - branch
jnb Flag_Startup_Phase, comp_check_timeout_timeout_extended ; Extend timeout during startup
djnz Startup_Zc_Timeout_Cntd, comp_check_timeout_extend_timeout
comp_check_timeout_timeout_extended: setb Flag_Comp_Timed_Out sjmp comp_exit
comp_check_timeout_extend_timeout: call setup_zc_scan_timeout
comp_check_timeout_not_timed_out: inc Comparator_Read_Cnt ; Increment comparator read count Read_Comp_Out ; Read comparator output anl A, #40h cjne A, B, comp_read_wrong
; Comp read ok mov A, Startup_Cnt ; Force a timeout for the first commutation jz comp_start
jb Flag_Demag_Detected, comp_start ; Do not accept correct comparator output if it is demag
djnz Temp3, comp_check_timeout ; Decrement readings counter - repeat comparator reading if not zero
clr Flag_Comp_Timed_Out sjmp comp_exit
comp_read_wrong: jb Flag_Startup_Phase, comp_read_wrong_startup jb Flag_Demag_Detected, comp_read_wrong_extend_timeout
inc Temp3 ; Increment number of OK readings required clr C mov A, Temp3 subb A, Temp4 jc comp_check_timeout ; If below initial requirement - take another reading sjmp comp_start ; Otherwise - go back and restart
comp_read_wrong_startup: inc Temp3 ; Increment number of OK readings required clr C mov A, Temp3 subb A, Temp4 ; If above initial requirement - do not increment further jc ($+3) dec Temp3
sjmp comp_check_timeout ; Continue to look for good ones
comp_read_wrong_extend_timeout: clr Flag_Demag_Detected ; Clear demag detected flag anl EIE1, #7Fh ; Disable timer 3 interrupts mov TMR3CN0, #00h ; Timer 3 disabled and interrupt flag cleared jnb Flag_High_Rpm, comp_read_wrong_low_rpm ; Branch if not high rpm
mov TMR3L, #00h ; Set timeout to ~1ms mov TMR3H, #-(8 SHL MCU_48MHZ)
comp_read_wrong_timeout_set: mov TMR3CN0, #04h ; Timer 3 enabled and interrupt flag cleared setb Flag_Timer3_Pending orl EIE1, #80h ; Enable timer 3 interrupts jmp comp_start ; If comparator output is not correct - go back and restart
comp_read_wrong_low_rpm: mov A, Comm_Period4x_H ; Set timeout to ~4x comm period 4x value mov Temp7, #0FFh ; Default to long
IF MCU_48MHZ == 1 clr C rlc A jc comp_read_wrong_load_timeoutENDIF
clr C rlc A jc comp_read_wrong_load_timeout
clr C rlc A jc comp_read_wrong_load_timeout
mov Temp7, A
comp_read_wrong_load_timeout: clr C clr A subb A, Temp7 mov TMR3L, #0 mov TMR3H, A sjmp comp_read_wrong_timeout_set
comp_exit:
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Setup commutation timing routine;; Sets up and starts wait from commutation to zero cross;;**** **** **** **** **** **** **** **** **** **** **** **** ****setup_comm_wait: clr IE_EA anl EIE1, #7Fh ; Disable timer 3 interrupts mov TMR3CN0, #00h ; Timer 3 disabled and interrupt flag cleared mov TMR3L, Wt_Comm_Start_L mov TMR3H, Wt_Comm_Start_H mov TMR3CN0, #04h ; Timer 3 enabled and interrupt flag cleared ; Setup next wait time mov TMR3RLL, Wt_Adv_Start_L mov TMR3RLH, Wt_Adv_Start_H setb Flag_Timer3_Pending orl EIE1, #80h ; Enable timer 3 interrupts setb IE_EA ; Enable interrupts again
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Evaluate comparator integrity;; Checks comparator signal behavior versus expected behavior;;**** **** **** **** **** **** **** **** **** **** **** **** ****evaluate_comparator_integrity: jb Flag_Startup_Phase, eval_comp_startup ; Do not exit run mode during startup phases
jnb Flag_Comp_Timed_Out, eval_comp_exit ; Has timeout elapsed? jb Flag_Initial_Run_Phase, eval_comp_exit ; Do not exit run mode if initial run phase jb Flag_Dir_Change_Brake, eval_comp_exit ; Do not exit run mode if braking jb Flag_Demag_Detected, eval_comp_exit ; Do not exit run mode if it is a demag situation
dec SP ; Routine exit without "ret" command dec SP ljmp run_to_wait_for_power_on_fail ; Exit run mode if timeout has elapsed
eval_comp_startup: inc Startup_Cnt ; Increment startup counter
eval_comp_exit: ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Wait for commutation routine;; Waits from zero cross to commutation;;**** **** **** **** **** **** **** **** **** **** **** **** ****wait_for_comm: ; Update demag metric mov A, Demag_Detected_Metric ; Sliding average of 8, 256 when demag and 0 when not. Limited to minimum 120 mov B, #7 mul AB ; Multiply by 7
jnb Flag_Demag_Detected, ($+4) ; Add new value for current demag status inc B
mov C, B.0 ; Divide by 8 rrc A mov C, B.1 rrc A mov C, B.2 rrc A mov Demag_Detected_Metric, A clr C subb A, #120 ; Limit to minimum 120 jnc ($+5) mov Demag_Detected_Metric, #120
clr C mov A, Demag_Detected_Metric ; Check demag metric subb A, Demag_Pwr_Off_Thresh jc wait_for_comm_wait ; Cut power if many consecutive demags. This will help retain sync during hard accelerations
All_pwmFETs_off Set_Pwms_Off
wait_for_comm_wait: Wait_For_Timer3
; Setup next wait time mov TMR3RLL, Wt_Zc_Scan_Start_L mov TMR3RLH, Wt_Zc_Scan_Start_H setb Flag_Timer3_Pending orl EIE1, #80h ; Enable timer 3 interrupts ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Commutation routines;; Performs commutation switching;;**** **** **** **** **** **** **** **** **** **** **** **** ****; Comm phase 1 to comm phase 2comm1_comm2: ; C->A Set_RPM_Out jb Flag_Pgm_Dir_Rev, comm1_comm2_rev
clr IE_EA ; Disable all interrupts BcomFET_off ; Turn off comfet AcomFET_on ; Turn on comfet Set_Pwm_C ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_B ; Set comparator phase ret
comm1_comm2_rev: ; A->C clr IE_EA ; Disable all interrupts BcomFET_off ; Turn off comfet CcomFET_on ; Turn on comfet (reverse) Set_Pwm_A ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_B ; Set comparator phase ret
; Comm phase 2 to comm phase 3comm2_comm3: ; B->A Clear_RPM_Out jb Flag_Pgm_Dir_Rev, comm2_comm3_rev
clr IE_EA ; Disable all interrupts CpwmFET_off ; Turn off pwmfet Set_Pwm_B ; To reapply power after a demag cut AcomFET_on setb IE_EA Set_Comp_Phase_C ; Set comparator phase ret
comm2_comm3_rev: ; B->C clr IE_EA ; Disable all interrupts ApwmFET_off ; Turn off pwmfet (reverse) Set_Pwm_B ; To reapply power after a demag cut CcomFET_on setb IE_EA Set_Comp_Phase_A ; Set comparator phase (reverse) ret
; Comm phase 3 to comm phase 4comm3_comm4: ; B->C Set_RPM_Out jb Flag_Pgm_Dir_Rev, comm3_comm4_rev
clr IE_EA ; Disable all interrupts AcomFET_off ; Turn off comfet CcomFET_on ; Turn on comfet Set_Pwm_B ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_A ; Set comparator phase ret
comm3_comm4_rev: ; B->A clr IE_EA ; Disable all interrupts CcomFET_off ; Turn off comfet (reverse) AcomFET_on ; Turn on comfet (reverse) Set_Pwm_B ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_C ; Set comparator phase (reverse) ret
; Comm phase 4 to comm phase 5comm4_comm5: ; A->C Clear_RPM_Out jb Flag_Pgm_Dir_Rev, comm4_comm5_rev
clr IE_EA ; Disable all interrupts BpwmFET_off ; Turn off pwmfet Set_Pwm_A ; To reapply power after a demag cut CcomFET_on setb IE_EA Set_Comp_Phase_B ; Set comparator phase ret
comm4_comm5_rev: ; C->A clr IE_EA ; Disable all interrupts BpwmFET_off ; Turn off pwmfet Set_Pwm_C AcomFET_on ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_B ; Set comparator phase ret
; Comm phase 5 to comm phase 6comm5_comm6: ; A->B Set_RPM_Out jb Flag_Pgm_Dir_Rev, comm5_comm6_rev
clr IE_EA ; Disable all interrupts CcomFET_off ; Turn off comfet BcomFET_on ; Turn on comfet Set_Pwm_A ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_C ; Set comparator phase ret
comm5_comm6_rev: ; C->B clr IE_EA ; Disable all interrupts AcomFET_off ; Turn off comfet (reverse) BcomFET_on ; Turn on comfet Set_Pwm_C ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_A ; Set comparator phase (reverse) ret
; Comm phase 6 to comm phase 1comm6_comm1: ; C->B Clear_RPM_Out jb Flag_Pgm_Dir_Rev, comm6_comm1_rev
clr IE_EA ; Disable all interrupts ApwmFET_off ; Turn off pwmfet Set_Pwm_C BcomFET_on ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_A ; Set comparator phase ret
comm6_comm1_rev: ; A->B clr IE_EA ; Disable all interrupts CpwmFET_off ; Turn off pwmfet (reverse) Set_Pwm_A BcomFET_on ; To reapply power after a demag cut setb IE_EA Set_Comp_Phase_C ; Set comparator phase (reverse) ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; DShot;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Detect DShot RCP level;; Determine if RCP signal level is normal or inverted DShot;;**** **** **** **** **** **** **** **** **** **** **** **** ****detect_rcp_level: mov A, #50 ; Must detect the same level 50 times (25 us) mov C, RTX_PORT.RTX_PIN
detect_rcp_level_read: jc ($+5) jb RTX_PORT.RTX_PIN, detect_rcp_level ; Level changed from low to high - start over jnc ($+5) jnb RTX_PORT.RTX_PIN, detect_rcp_level ; Level changed from high to low - start over djnz ACC, detect_rcp_level_read
mov Flag_Rcp_DShot_Inverted, C ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Check DShot command;; Determine received DShot command and perform action;;**** **** **** **** **** **** **** **** **** **** **** **** ****dshot_cmd_check: mov A, DShot_Cmd jz dshot_cmd_exit_no_clear
mov Temp1, A clr C subb A, #6 ; Beacon beeps for command 1-5 jnc dshot_cmd_direction_1
call beacon_beep call wait200ms
sjmp dshot_cmd_exit
dshot_cmd_direction_1: ; Change programmed motor direction to normal cjne Temp1, #7, dshot_cmd_direction_2
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
mov A, #1 jnb Flag_Pgm_Bidir, ($+5) mov A, #3 mov Temp1, #Pgm_Direction mov @Temp1, A clr Flag_Pgm_Dir_Rev clr Flag_Pgm_Bidir_Rev
sjmp dshot_cmd_exit
dshot_cmd_direction_2: ; Change programmed motor direction to reversed cjne Temp1, #8, dshot_cmd_direction_bidir_off
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
mov A, #2 jnb Flag_Pgm_Bidir, ($+5) mov A, #4 mov Temp1, #Pgm_Direction mov @Temp1, A setb Flag_Pgm_Dir_Rev setb Flag_Pgm_Bidir_Rev
sjmp dshot_cmd_exit
dshot_cmd_direction_bidir_off: ; Change programmed motor mode to normal (not bidirectional) cjne Temp1, #9, dshot_cmd_direction_bidir_on
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
jnb Flag_Pgm_Bidir, dshot_cmd_exit
clr C mov Temp1, #Pgm_Direction mov A, @Temp1 dec A clr ACC.1 inc A mov @Temp1, A clr Flag_Pgm_Bidir
sjmp dshot_cmd_exit
dshot_cmd_direction_bidir_on: ; Change programmed motor mode to bidirectional cjne Temp1, #10, dshot_cmd_direction_normal
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
jb Flag_Pgm_Bidir, dshot_cmd_exit
mov Temp1, #Pgm_Direction mov A, @Temp1 dec A setb ACC.1 inc A mov @Temp1, A setb Flag_Pgm_Bidir
dshot_cmd_exit: mov DShot_Cmd, #0 mov DShot_Cmd_Cnt, #0
dshot_cmd_exit_no_clear: ret
dshot_cmd_direction_normal: ; Change programmed motor direction to that stored in eeprom cjne Temp1, #20, dshot_cmd_direction_reverse
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
clr IE_EA ; DPTR used in interrupts mov DPTR, #Eep_Pgm_Direction ; Read from flash mov A, #0 movc A, @A+DPTR setb IE_EA mov Temp1, #Pgm_Direction mov @Temp1, A rrc A ; Lsb to carry cpl C mov Flag_Pgm_Dir_Rev, C mov Flag_Pgm_Bidir_Rev, C
sjmp dshot_cmd_exit
dshot_cmd_direction_reverse: ; Temporary reverse ; Change programmed motor direction to the reverse of what is stored in eeprom cjne Temp1, #21, dshot_cmd_save_settings
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
clr IE_EA ; DPTR used in interrupts mov DPTR, #Eep_Pgm_Direction ; Read from flash mov A, #0 movc A, @A+DPTR setb IE_EA
dec A cpl ACC.0 inc A mov Temp1, #Pgm_Direction mov @Temp1, A rrc A ; Lsb to carry cpl C mov Flag_Pgm_Dir_Rev, C mov Flag_Pgm_Bidir_Rev, C
sjmp dshot_cmd_exit
dshot_cmd_save_settings: cjne Temp1, #12, dshot_cmd_exit
clr C mov A, DShot_Cmd_Cnt subb A, #6 ; Needs to receive it 6 times in a row jc dshot_cmd_exit_no_clear
mov Flash_Key_1, #0A5h ; Initialize flash keys to valid values mov Flash_Key_2, #0F1h
call erase_and_store_all_in_eeprom
mov Flash_Key_1, #0 ; Initialize flash keys to invalid values mov Flash_Key_2, #0
setb IE_EA
sjmp dshot_cmd_exit
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; DShot beacon beep;; Beep with beacon strength; Beep type 1-5 in Temp1;; Note: This routine switches off power;;**** **** **** **** **** **** **** **** **** **** **** **** ****beacon_beep: clr IE_EA ; Disable all interrupts call switch_power_off ; Switch power off in case braking is set mov Temp2, #Pgm_Beacon_Strength ; Set beacon beep strength mov Beep_Strength, @Temp2
cjne Temp1, #1, beacon_beep2 call beep_f1 sjmp beacon_beep_exit
beacon_beep2: cjne Temp1, #2, beacon_beep3 call beep_f2 sjmp beacon_beep_exit
beacon_beep3: cjne Temp1, #3, beacon_beep4 call beep_f3 sjmp beacon_beep_exit
beacon_beep4: cjne Temp1, #4, beacon_beep5 call beep_f4 sjmp beacon_beep_exit
beacon_beep5: call beep_f5
beacon_beep_exit: mov Temp2, #Pgm_Beep_Strength ; Set normal beep strength mov Beep_Strength, @Temp2 setb IE_EA ; Enable all interrupts ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; DShot telemetry create packet;; Create DShot telemetry packet and prepare it for being sent; The routine is divided into 6 sections that can return early; in order to reduce commutation interference;; Requirements: Must NOT be called while Flag_Telemetry_Pending is set;;**** **** **** **** **** **** **** **** **** **** **** **** ****dshot_tlm_create_packet: push PSW mov PSW, #10h ; Select register bank 2
Early_Return_Packet_Stage 0
; Read commutation period clr IE_EA mov Tlm_Data_L, Comm_Period4x_L mov Tlm_Data_H, Comm_Period4x_H setb IE_EA
; Multiply period by 3/4 (1/2 + 1/4) mov A, Tlm_Data_L mov C, Tlm_Data_H.0 rrc A mov Temp2, A mov C, Tlm_Data_H.1 rrc A add A, Temp2 mov Tlm_Data_L, A
mov A, Tlm_Data_H rr A clr ACC.7 mov Temp2, A rr A clr ACC.7 addc A, Temp2 mov Tlm_Data_H, A
Early_Return_Packet_Stage 1 mov A, Tlm_Data_H
; 12-bit encode telemetry data jnz dshot_12bit_encode mov A, Tlm_Data_L ; Already 12-bit jnz dshot_tlm_12bit_encoded
; If period is zero then reset to FFFFh (FFFh for 12-bit) mov Tlm_Data_H, #0Fh mov Tlm_Data_L, #0FFh
dshot_tlm_12bit_encoded: Early_Return_Packet_Stage 2 mov A, Tlm_Data_L
; Compute inverted xor checksum (4-bit) swap A xrl A, Tlm_Data_L xrl A, Tlm_Data_H cpl A
; GCR encode the telemetry data (16-bit) mov Temp1, #Temp_Storage ; Store pulse timings in Temp_Storage mov @Temp1, DShot_GCR_Pulse_Time_1; Final transition time
call dshot_gcr_encode ; GCR encode lowest 4-bit of A (store through Temp1)
Early_Return_Packet_Stage 3
mov A, Tlm_Data_L call dshot_gcr_encode
Early_Return_Packet_Stage 4
mov A, Tlm_Data_L swap A call dshot_gcr_encode
Early_Return_Packet_Stage 5
mov A, Tlm_Data_H call dshot_gcr_encode
inc Temp1 mov Temp5, #0 ; Reset current packet stage
pop PSW setb Flag_Telemetry_Pending ; Mark that packet is ready to be sent ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; DShot 12-bit encode;; Encodes 16-bit e-period as a 12-bit value of the form:; <e e e m m m m m m m m m> where M SHL E ~ e-period [us];; Note: Not callable to improve performance;;**** **** **** **** **** **** **** **** **** **** **** **** ****dshot_12bit_encode: ; Encode 16-bit e-period as a 12-bit value jb ACC.7, dshot_12bit_7 ; ACC = Tlm_Data_H jb ACC.6, dshot_12bit_6 jb ACC.5, dshot_12bit_5 jb ACC.4, dshot_12bit_4 jb ACC.3, dshot_12bit_3 jb ACC.2, dshot_12bit_2 jb ACC.1, dshot_12bit_1 mov A, Tlm_Data_L ; Already 12-bit (E=0) ajmp dshot_tlm_12bit_encoded
dshot_12bit_7: ;mov A, Tlm_Data_H mov C, Tlm_Data_L.7 rlc A mov Tlm_Data_L, A mov Tlm_Data_H, #0fh ajmp dshot_tlm_12bit_encoded
dshot_12bit_6: ;mov A, Tlm_Data_H mov C, Tlm_Data_L.7 rlc A mov C, Tlm_Data_L.6 rlc A mov Tlm_Data_L, A mov Tlm_Data_H, #0dh ajmp dshot_tlm_12bit_encoded
dshot_12bit_5: ;mov A, Tlm_Data_H mov C, Tlm_Data_L.7 rlc A mov C, Tlm_Data_L.6 rlc A mov C, Tlm_Data_L.5 rlc A mov Tlm_Data_L, A mov Tlm_Data_H, #0bh ajmp dshot_tlm_12bit_encoded
dshot_12bit_4: mov A, Tlm_Data_L anl A, #0f0h clr Tlm_Data_H.4 orl A, Tlm_Data_H swap A mov Tlm_Data_L, A mov Tlm_Data_H, #09h ajmp dshot_tlm_12bit_encoded
dshot_12bit_3: mov A, Tlm_Data_L mov C, Tlm_Data_H.0 rrc A mov C, Tlm_Data_H.1 rrc A mov C, Tlm_Data_H.2 rrc A mov Tlm_Data_L, A mov Tlm_Data_H, #07h ajmp dshot_tlm_12bit_encoded
dshot_12bit_2: mov A, Tlm_Data_L mov C, Tlm_Data_H.0 rrc A mov C, Tlm_Data_H.1 rrc A mov Tlm_Data_L, A mov Tlm_Data_H, #05h ajmp dshot_tlm_12bit_encoded
dshot_12bit_1: mov A, Tlm_Data_L mov C, Tlm_Data_H.0 rrc A mov Tlm_Data_L, A mov Tlm_Data_H, #03h ajmp dshot_tlm_12bit_encoded
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; DShot GCR encode;; GCR encode e-period data for DShot telemetry;; Input; - Temp1: Data pointer for storing pulse timings; - A: 4-bit value to GCR encode; - B: Time that must be added to transition; Output; - B: Time remaining to be added to next transition;;**** **** **** **** **** **** **** **** **** **** **** **** ****dshot_gcr_encode: anl A, #0Fh rl A ; Multiply by 2 to match jump offsets mov DPTR, #dshot_gcr_encode_jump_table jmp @A+DPTR
dshot_gcr_encode_jump_table: ajmp dshot_gcr_encode_0_11001 ajmp dshot_gcr_encode_1_11011 ajmp dshot_gcr_encode_2_10010 ajmp dshot_gcr_encode_3_10011 ajmp dshot_gcr_encode_4_11101 ajmp dshot_gcr_encode_5_10101 ajmp dshot_gcr_encode_6_10110 ajmp dshot_gcr_encode_7_10111 ajmp dshot_gcr_encode_8_11010 ajmp dshot_gcr_encode_9_01001 ajmp dshot_gcr_encode_A_01010 ajmp dshot_gcr_encode_B_01011 ajmp dshot_gcr_encode_C_11110 ajmp dshot_gcr_encode_D_01101 ajmp dshot_gcr_encode_E_01110 ajmp dshot_gcr_encode_F_01111
; GCR encoding is ordered by least significant bit first,; and represented as pulse durations.dshot_gcr_encode_0_11001: imov Temp1, DShot_GCR_Pulse_Time_3 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_1_11011: imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_2_10010: GCR_Add_Time Temp1 imov Temp1, DShot_GCR_Pulse_Time_3 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_3_10011: imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_3 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_4_11101: imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_5_10101: imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_6_10110: GCR_Add_Time Temp1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_7_10111: imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_8_11010: GCR_Add_Time Temp1 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_9_01001: imov Temp1, DShot_GCR_Pulse_Time_3 imov Temp1, DShot_GCR_Pulse_Time_2 ret
dshot_gcr_encode_A_01010: GCR_Add_Time Temp1 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_2 ret
dshot_gcr_encode_B_01011: imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_2 ret
dshot_gcr_encode_C_11110: GCR_Add_Time Temp1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 ret
dshot_gcr_encode_D_01101: imov Temp1, DShot_GCR_Pulse_Time_2 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 ret
dshot_gcr_encode_E_01110: GCR_Add_Time Temp1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 ret
dshot_gcr_encode_F_01111: imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_1 imov Temp1, DShot_GCR_Pulse_Time_2 ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; ESC programming (EEPROM emulation);;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Read all eeprom parameters routine;;**** **** **** **** **** **** **** **** **** **** **** **** ****read_all_eeprom_parameters: ; Check initialized signature mov DPTR, #Eep_Initialized_L mov Temp1, #Bit_Access call read_eeprom_byte mov A, Bit_Access cjne A, #055h, read_eeprom_store_defaults inc DPTR ; Now Eep_Initialized_H call read_eeprom_byte mov A, Bit_Access cjne A, #0AAh, read_eeprom_store_defaults jmp read_eeprom_read
read_eeprom_store_defaults: mov Flash_Key_1, #0A5h mov Flash_Key_2, #0F1h call set_default_parameters call erase_and_store_all_in_eeprom mov Flash_Key_1, #0 mov Flash_Key_2, #0 jmp read_eeprom_exit
read_eeprom_read: ; Read eeprom mov DPTR, #_Eep_Pgm_Gov_P_Gain mov Temp1, #_Pgm_Gov_P_Gain mov Temp4, #10 ; 10 parametersread_eeprom_block1: call read_eeprom_byte inc DPTR inc Temp1 djnz Temp4, read_eeprom_block1
mov DPTR, #_Eep_Enable_TX_Program mov Temp1, #_Pgm_Enable_TX_Program mov Temp4, #26 ; 26 parametersread_eeprom_block2: call read_eeprom_byte inc DPTR inc Temp1 djnz Temp4, read_eeprom_block2
mov DPTR, #Eep_Dummy ; Set pointer to uncritical area
read_eeprom_exit: ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Erase flash and store all parameter value in EEPROM routine;;**** **** **** **** **** **** **** **** **** **** **** **** ****erase_and_store_all_in_eeprom: clr IE_EA ; Disable interrupts call read_tags call erase_flash ; Erase flash
mov DPTR, #Eep_FW_Main_Revision ; Store firmware main revision mov A, #EEPROM_FW_MAIN_REVISION call write_eeprom_byte_from_acc
inc DPTR ; Now firmware sub revision mov A, #EEPROM_FW_SUB_REVISION call write_eeprom_byte_from_acc
inc DPTR ; Now layout revision mov A, #EEPROM_LAYOUT_REVISION call write_eeprom_byte_from_acc
; Write eeprom mov DPTR, #_Eep_Pgm_Gov_P_Gain mov Temp1, #_Pgm_Gov_P_Gain mov Temp4, #10 ; 10 parameterswrite_eeprom_block1: call write_eeprom_byte inc DPTR inc Temp1 djnz Temp4, write_eeprom_block1
mov DPTR, #_Eep_Enable_TX_Program mov Temp1, #_Pgm_Enable_TX_Program mov Temp4, #26 ; 26 parameterswrite_eeprom_block2: call write_eeprom_byte inc DPTR inc Temp1 djnz Temp4, write_eeprom_block2
call write_tags call write_eeprom_signature mov DPTR, #Eep_Dummy ; Set pointer to uncritical area ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Read eeprom byte routine;; Gives data in A and in address given by Temp1; Assumes address in DPTR;;**** **** **** **** **** **** **** **** **** **** **** **** ****read_eeprom_byte: clr A movc A, @A+DPTR ; Read from flash mov @Temp1, A ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Write eeprom byte routine;; Assumes data in address given by Temp1, or in accumulator; Assumes address in DPTR;;**** **** **** **** **** **** **** **** **** **** **** **** ****write_eeprom_byte: mov A, @Temp1write_eeprom_byte_from_acc: orl PSCTL, #01h ; Set the PSWE bit anl PSCTL, #0FDh ; Clear the PSEE bit mov Temp8, A clr C mov A, DPH ; Check that address is not in bootloader area subb A, #1Ch jc ($+3)
ret
mov A, Temp8 mov FLKEY, Flash_Key_1 ; First key code mov FLKEY, Flash_Key_2 ; Second key code movx @DPTR, A ; Write to flash anl PSCTL, #0FEh ; Clear the PSWE bit ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Erase flash routine (erases the flash segment used for "eeprom" variables);;**** **** **** **** **** **** **** **** **** **** **** **** ****erase_flash: orl PSCTL, #02h ; Set the PSEE bit orl PSCTL, #01h ; Set the PSWE bit mov FLKEY, Flash_Key_1 ; First key code mov FLKEY, Flash_Key_2 ; Second key code mov DPTR, #Eep_Initialized_L movx @DPTR, A anl PSCTL, #0FCh ; Clear the PSEE and PSWE bits ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Write eeprom signature routine;;**** **** **** **** **** **** **** **** **** **** **** **** ****write_eeprom_signature: mov DPTR, #Eep_Initialized_L mov A, #055h call write_eeprom_byte_from_acc
mov DPTR, #Eep_Initialized_H mov A, #0AAh call write_eeprom_byte_from_acc ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Read all tags from flash and store in temporary storage;;**** **** **** **** **** **** **** **** **** **** **** **** ****read_tags: mov Temp3, #48 ; Number of tags mov Temp2, #Temp_Storage ; Set RAM address mov Temp1, #Bit_Access mov DPTR, #Eep_ESC_Layout ; Set flash addressread_tag: call read_eeprom_byte mov A, Bit_Access mov @Temp2, A ; Write to RAM inc Temp2 inc DPTR djnz Temp3, read_tag ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Write all tags from temporary storage and store in flash;;**** **** **** **** **** **** **** **** **** **** **** **** ****write_tags: mov Temp3, #48 ; Number of tags mov Temp2, #Temp_Storage ; Set RAM address mov DPTR, #Eep_ESC_Layout ; Set flash addresswrite_tag: mov A, @Temp2 ; Read from RAM call write_eeprom_byte_from_acc inc Temp2 inc DPTR djnz Temp3, write_tag ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Settings;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Set default parameters;; Sets default programming parameters;;**** **** **** **** **** **** **** **** **** **** **** **** ****set_default_parameters: mov Temp1, #_Pgm_Gov_P_Gain mov @Temp1, #0FFh ; _Pgm_Gov_P_Gain imov Temp1, #DEFAULT_PGM_STARTUP_POWER_MIN ; Pgm_Startup_Power_Min imov Temp1, #DEFAULT_PGM_STARTUP_BEEP ; Pgm_Startup_Beep imov Temp1, #DEFAULT_PGM_DITHERING ; Pgm_Dithering imov Temp1, #DEFAULT_PGM_STARTUP_POWER_MAX ; Pgm_Startup_Power_Max imov Temp1, #0FFh ; _Pgm_Rampup_Slope imov Temp1, #DEFAULT_PGM_RPM_POWER_SLOPE ; Pgm_Rpm_Power_Slope imov Temp1, #0FFh ; _Pgm_Pwm_Freq imov Temp1, #DEFAULT_PGM_DIRECTION ; Pgm_Direction imov Temp1, #0FFh ; _Pgm_Input_Pol
inc Temp1 ; Skip Initialized_L_Dummy inc Temp1 ; Skip Initialized_H_Dummy
imov Temp1, #0FFh ; _Pgm_Enable_TX_Program imov Temp1, #0FFh ; _Pgm_Main_Rearm_Start imov Temp1, #0FFh ; _Pgm_Gov_Setup_Target imov Temp1, #0FFh ; _Pgm_Startup_Rpm imov Temp1, #0FFh ; _Pgm_Startup_Accel imov Temp1, #0FFh ; _Pgm_Volt_Comp imov Temp1, #DEFAULT_PGM_COMM_TIMING ; Pgm_Comm_Timing imov Temp1, #0FFh ; _Pgm_Damping_Force imov Temp1, #0FFh ; _Pgm_Gov_Range imov Temp1, #0FFh ; _Pgm_Startup_Method imov Temp1, #0FFh ; _Pgm_Min_Throttle imov Temp1, #0FFh ; _Pgm_Max_Throttle imov Temp1, #DEFAULT_PGM_BEEP_STRENGTH ; Pgm_Beep_Strength imov Temp1, #DEFAULT_PGM_BEACON_STRENGTH ; Pgm_Beacon_Strength imov Temp1, #DEFAULT_PGM_BEACON_DELAY ; Pgm_Beacon_Delay imov Temp1, #0FFh ; _Pgm_Throttle_Rate imov Temp1, #DEFAULT_PGM_DEMAG_COMP ; Pgm_Demag_Comp imov Temp1, #0FFh ; _Pgm_BEC_Voltage_High imov Temp1, #0FFh ; _Pgm_Center_Throttle imov Temp1, #0FFh ; _Pgm_Main_Spoolup_Time imov Temp1, #DEFAULT_PGM_ENABLE_TEMP_PROT ; Pgm_Enable_Temp_Prot imov Temp1, #0FFh ; _Pgm_Enable_Power_Prot imov Temp1, #0FFh ; _Pgm_Enable_Pwm_Input imov Temp1, #0FFh ; _Pgm_Pwm_Dither imov Temp1, #DEFAULT_PGM_BRAKE_ON_STOP ; Pgm_Brake_On_Stop imov Temp1, #DEFAULT_PGM_LED_CONTROL ; Pgm_LED_Control
ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Decode settings;; Decodes various settings;;**** **** **** **** **** **** **** **** **** **** **** **** ****decode_settings: mov Temp1, #Pgm_Direction ; Load programmed direction mov A, @Temp1 dec A mov C, ACC.1 ; Set bidirectional mode mov Flag_Pgm_Bidir, C mov C, ACC.0 ; Set direction (Normal / Reversed) mov Flag_Pgm_Dir_Rev, C mov Flag_Pgm_Bidir_Rev, C
; Check startup power mov Temp1, #Pgm_Startup_Power_Max mov A, #80 ; Limit to at most 80 subb A, @Temp1 jnc ($+4) mov @Temp1, #80
; Check low rpm power slope mov Temp1, #Pgm_Rpm_Power_Slope mov A, #13 ; Limit to at most 13 subb A, @Temp1 jnc ($+4) mov @Temp1, #13
mov Low_Rpm_Pwr_Slope, @Temp1
; Decode demag compensation mov Temp1, #Pgm_Demag_Comp mov A, @Temp1 mov Demag_Pwr_Off_Thresh, #255 ; Set default
cjne A, #2, decode_demag_high
mov Demag_Pwr_Off_Thresh, #160 ; Settings for demag comp low
decode_demag_high: cjne A, #3, decode_demag_done
mov Demag_Pwr_Off_Thresh, #130 ; Settings for demag comp high
decode_demag_done: ; Decode temperature protection limit mov Temp1, #Pgm_Enable_Temp_Prot mov A, @Temp1 mov Temp1, A jz decode_temp_done
mov A, #(TEMP_LIMIT-TEMP_LIMIT_STEP)decode_temp_step: add A, #TEMP_LIMIT_STEP djnz Temp1, decode_temp_step
decode_temp_done: mov Temp_Prot_Limit, A
mov Temp1, #Pgm_Beep_Strength ; Set beep strength mov Beep_Strength, @Temp1
mov Temp1, #Pgm_Dithering ; Read programmed dithering setting mov A, @Temp1 clr Flag_Dithering jz decode_dithering setb Flag_Dithering
decode_dithering:IF PWM_BITS_H == 2 ; Initialize pwm dithering bit patterns mov Temp1, #Dithering_Patterns mov @Temp1, #00h imov Temp1, #55hELSEIF PWM_BITS_H == 1 mov Temp1, #Dithering_Patterns mov @Temp1, #00h imov Temp1, #11h imov Temp1, #55h imov Temp1, #77hELSEIF PWM_BITS_H == 0 mov Temp1, #Dithering_Patterns mov @Temp1, #00h imov Temp1, #01h imov Temp1, #11h imov Temp1, #25h imov Temp1, #55h imov Temp1, #5Bh imov Temp1, #77h imov Temp1, #7fhENDIF ret
;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Main program;;**** **** **** **** **** **** **** **** **** **** **** **** ****;**** **** **** **** **** **** **** **** **** **** **** **** ****
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Main program entry point;;**** **** **** **** **** **** **** **** **** **** **** **** ****pgm_start: mov Flash_Key_1, #0 ; Initialize flash keys to invalid values mov Flash_Key_2, #0 mov WDTCN, #0DEh ; Disable watchdog (WDT) mov WDTCN, #0ADh mov SP, #Stack ; Initialize stack (16 bytes of indirect RAM) orl VDM0CN, #080h ; Enable the VDD monitor mov RSTSRC, #06h ; Set missing clock and VDD monitor as a reset source if not 1S capable mov CLKSEL, #00h ; Set clock divider to 1 (Oscillator 0 at 24MHz) call switch_power_off ; Ports initialization mov P0, #P0_INIT mov P0MDIN, #P0_DIGITAL mov P0MDOUT, #P0_PUSHPULL mov P0, #P0_INIT mov P0SKIP, #P0_SKIP mov P1, #P1_INIT mov P1MDIN, #P1_DIGITAL mov P1MDOUT, #P1_PUSHPULL mov P1, #P1_INIT mov P1SKIP, #P1_SKIP mov P2MDOUT, #P2_PUSHPULL Initialize_Xbar ; Initialize the XBAR and related functionality call switch_power_off ; Switch power off again, after initializing ports
; Clear RAM clr A ; Clear accumulator mov Temp1, A ; Clear Temp1 clear_ram: mov @Temp1, A ; Clear RAM address djnz Temp1, clear_ram ; Decrement address and repeat
call set_default_parameters ; Set default programmed parameters call read_all_eeprom_parameters ; Read all programmed parameters mov Temp1, #Pgm_Beep_Strength ; Read programmed beep strength mov Beep_Strength, @Temp1 ; Set beep strength
; Initializing beeps clr IE_EA ; Disable interrupts explicitly call wait100ms ; Wait a bit to avoid audible resets if not properly powered
mov Temp1, #Pgm_Startup_Beep ; Read programmed startup beep setting mov A, @Temp1 jnz startup_beep_melody
call beep_f2_short ; Short startup beep call wait250ms call wait250ms call wait250ms call wait250ms sjmp startup_beep_done
startup_beep_melody: call beep_f1 ; Normal startup melody call wait5ms call beep_f2 call wait5ms call beep_f1 call wait5ms call beep_f3 call wait200ms call beep_f2 call beep_f4 call beep_f4
startup_beep_done: call led_control ; Set LEDs to programmed values
call wait250ms ; Wait for flight controller to get ready call wait250ms
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; No signal entry point;;**** **** **** **** **** **** **** **** **** **** **** **** ****init_no_signal: clr IE_EA ; Disable interrupts explicitly mov Flash_Key_1, #0 ; Initialize flash keys to invalid values mov Flash_Key_2, #0
mov Temp1, #250 ; Check if input signal is high for more than 15msinput_high_check_1: mov Temp2, #250input_high_check_2: jnb RTX_PORT.RTX_PIN, bootloader_done ; Look for low djnz Temp2, input_high_check_2 djnz Temp1, input_high_check_1
ljmp 1C00h ; Jump to bootloader
bootloader_done: call decode_settings call switch_power_offIF MCU_48MHZ == 1 Set_MCU_Clk_24MHz ; Set clock frequencyENDIF
jnb Flag_Had_Signal, setup_dshot call beep_f2 ; Beep on signal loss or stall call beep_f2 call beep_f2 call beep_f2 call beep_f2 call wait200ms clr Flag_Had_Signal
setup_dshot: ; Setup timers for DShot mov TCON, #51h ; Timer 0/1 run and INT0 edge triggered mov CKCON0, #01h ; Timer 0/1 clock is system clock divided by 4 (for DShot150) mov TMOD, #0AAh ; Timer 0/1 set to 8bits auto reload and gated by INT0/1 mov TH0, #0 ; Auto reload value zero mov TH1, #0
mov TMR2CN0, #04h ; Timer 2 enabled (system clock divided by 12) mov TMR3CN0, #04h ; Timer 3 enabled (system clock divided by 12)
Initialize_PCA ; Initialize PCA Set_Pwm_Polarity ; Set pwm polarity Enable_Power_Pwm_Module ; Enable power pwm module Enable_Damp_Pwm_Module ; Enable damping pwm module Initialize_Comparator ; Initialize comparator Initialize_Adc ; Initialize ADC operation call wait1ms
mov Startup_Stall_Cnt, #0 ; Reset stall count
mov DShot_Cmd, #0 ; Clear DShot command mov DShot_Cmd_Cnt, #0 ; Clear DShot command count clr Flag_Telemetry_Pending ; Clear DShot telemetry
call detect_rcp_level ; Detect RCP level (normal or inverted DShot)
; Route RCP according to detected DShot signal (normal or inverted) mov IT01CF, #(80h + (RTX_PIN SHL 4) + RTX_PIN) ; Route RCP input to INT0/1, with INT1 inverted jnb Flag_Rcp_DShot_Inverted, ($+6) mov IT01CF, #(08h + (RTX_PIN SHL 4) + RTX_PIN) ; Route RCP input to INT0/1, with INT0 inverted
; Setup interrupts for DShot mov IE, #2Dh ; Enable timer 1/2 interrupts and INT0/1 interrupts mov EIE1, #90h ; Enable timer 3 and PCA0 interrupts mov IP, #03h ; High priority to timer 0 and INT0 interrupts
setb IE_EA ; Enable all interrupts
; Setup variables for DShot150 (Only on 24MHz because frame length threshold cannot be scaled up)IF MCU_48MHZ == 0 mov DShot_Timer_Preset, #-64 ; Load DShot sync timer preset (for DShot150) mov DShot_Pwm_Thr, #8 ; Load DShot qualification pwm threshold (for DShot150) mov DShot_Frame_Length_Thr, #160 ; Load DShot frame length criteria
Set_DShot_Tlm_Bitrate 187500 ; = 5/4 * 150000
; Test whether signal is DShot150 mov Rcp_Outside_Range_Cnt, #10 ; Set out of range counter call wait100ms ; Wait for new RC pulse mov A, Rcp_Outside_Range_Cnt ; Check if pulses were accepted mov DShot_Cmd, #0 mov DShot_Cmd_Cnt, #0 jz arming_beginENDIF
mov CKCON0, #0Ch ; Timer 0/1 clock is system clock (for DShot300/600)
; Setup variables for DShot300 mov DShot_Timer_Preset, #-128 ; Load DShot sync timer preset (for DShot300) mov DShot_Pwm_Thr, #16 ; Load DShot pwm threshold (for DShot300) mov DShot_Frame_Length_Thr, #80 ; Load DShot frame length criteria
Set_DShot_Tlm_Bitrate 375000 ; = 5/4 * 300000
; Test whether signal is DShot300 mov Rcp_Outside_Range_Cnt, #10 ; Set out of range counter call wait100ms ; Wait for new RC pulse mov A, Rcp_Outside_Range_Cnt ; Check if pulses were accepted mov DShot_Cmd, #0 mov DShot_Cmd_Cnt, #0 jz arming_begin
; Setup variables for DShot600 mov DShot_Timer_Preset, #-64 ; Load DShot sync timer preset (for DShot600) mov DShot_Pwm_Thr, #8 ; Load DShot pwm threshold (for DShot600) mov DShot_Frame_Length_Thr, #40 ; Load DShot frame length criteria
Set_DShot_Tlm_Bitrate 750000 ; = 5/4 * 600000
; Test whether signal is DShot600 mov Rcp_Outside_Range_Cnt, #10 ; Set out of range counter call wait100ms ; Wait for new RC pulse mov A, Rcp_Outside_Range_Cnt ; Check if pulses were accepted mov DShot_Cmd, #0 mov DShot_Cmd_Cnt, #0 jz arming_begin
ljmp init_no_signal
arming_begin: push PSW mov PSW, #10h ; Temp8 in register bank 2 holds value mov Temp8, CKCON0 ; Save DShot clock settings for telemetry pop PSW
setb Flag_Had_Signal ; Mark that a signal has been detected
clr IE_EA call beep_f1_short ; Beep signal that RC pulse is ready setb IE_EA
arming_wait: call wait100ms jnb Flag_Rcp_Stop, arming_wait ; Wait until throttle is zero
clr IE_EA call beep_f2_short ; Beep signal that ESC is armed setb IE_EA
wait_for_power_on: ; Armed and waiting for power on clr A mov Comm_Period4x_L, A ; Reset commutation period for telemetry mov Comm_Period4x_H, A mov Power_On_Wait_Cnt_L, A ; Clear beacon wait counter mov Power_On_Wait_Cnt_H, A
wait_for_power_on_loop: inc Power_On_Wait_Cnt_L ; Increment low wait counter mov A, Power_On_Wait_Cnt_L cpl A jnz wait_for_power_on_no_beep ; Counter wrapping (about 3 sec)
inc Power_On_Wait_Cnt_H ; Increment high wait counter mov Temp1, #Pgm_Beacon_Delay mov A, @Temp1 mov Temp1, #20 ; 1 min dec A jz beep_delay_set
mov Temp1, #40 ; 2 min dec A jz beep_delay_set
mov Temp1, #100 ; 5 min dec A jz beep_delay_set
mov Temp1, #200 ; 10 min dec A jz beep_delay_set
mov Power_On_Wait_Cnt_H, #0 ; Reset counter for infinite delay
beep_delay_set: clr C mov A, Power_On_Wait_Cnt_H subb A, Temp1 ; Check against chosen delay jc wait_for_power_on_no_beep ; Has delay elapsed?
dec Power_On_Wait_Cnt_H ; Decrement high wait counter for continued beeping
mov Temp1, #4 ; Beep tone 4 call beacon_beep
wait_for_power_on_no_beep: jb Flag_Telemetry_Pending, wait_for_power_telemetry_done setb Flag_Timer3_Pending ; Set flag to avoid early return call dshot_tlm_create_packet ; Create telemetry packet (0 rpm)
wait_for_power_telemetry_done: call wait10ms mov A, Rcp_Timeout_Cntd ; Load RC pulse timeout counter value jnz wait_for_power_on_not_missing ; If it is not zero - proceed
ljmp init_no_signal ; If pulses missing - go back to detect input signal
wait_for_power_on_not_missing: jnb Flag_Rcp_Stop, wait_for_power_on_nonzero ; Higher than stop, Yes - proceed
mov A, DShot_Cmd jz wait_for_power_on_loop ; Check DShot command if not zero, otherwise wait for power
call dshot_cmd_check sjmp wait_for_power_on_not_missing ; Check DShot command again, in case it needs to be received multiple times
wait_for_power_on_nonzero: call wait100ms ; Wait to see if start pulse was only a glitch
mov DShot_Cmd, #0 ; Reset DShot command mov DShot_Cmd_Cnt, #0
mov A, Rcp_Timeout_Cntd ; Load RC pulse timeout counter value jnz init_start ; If it is not zero - proceed
ljmp init_no_signal ; If it is zero (pulses missing) - go back to detect input signal
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Motor start entry point;;**** **** **** **** **** **** **** **** **** **** **** **** ****init_start: clr IE_EA ; Disable interrupts call switch_power_off setb IE_EA ; Enable interrupts
clr A mov Flags1, A ; Clear flags1 mov Flags_Startup, A ; Clear startup flags mov Demag_Detected_Metric, A ; Clear demag metric
call wait1ms
; Read initial average temperature Start_Adc ; Start adc conversion
jnb ADC0CN0_ADINT, $ ; Wait for adc conversion to complete
Read_Adc_Result ; Read initial temperature mov A, Temp2 jnz ($+3) ; Is reading below 256? mov Temp1, A ; Yes - set average temperature value to zero
mov Current_Average_Temp, Temp1 ; Set initial average temperature
mov Adc_Conversion_Cnt, #8 ; Make sure a temp reading is done call check_temp_and_limit_power mov Adc_Conversion_Cnt, #8 ; Make sure a temp reading is done next time
; Set up start operating conditions clr IE_EA ; Disable interrupts mov Temp2, #Pgm_Startup_Power_Max mov Pwm_Limit_Beg, @Temp2 ; Set initial pwm limit mov Pwm_Limit, Pwm_Limit_Beg mov Pwm_Limit_By_Rpm, Pwm_Limit_Beg setb IE_EA ; Enable interrupts
; Begin startup sequenceIF MCU_48MHZ == 1 Set_MCU_Clk_48MHz
; Scale DShot criteria for 48MHz clr C rlca DShot_Timer_Preset ; Scale sync timer preset
clr C rlca DShot_Frame_Length_Thr ; Scale frame length criteria
clr C rlca DShot_Pwm_Thr ; Scale pulse width criteria
; Scale DShot telemetry for 24MHz xcha DShot_GCR_Pulse_Time_1, DShot_GCR_Pulse_Time_1_Tmp xcha DShot_GCR_Pulse_Time_2, DShot_GCR_Pulse_Time_2_Tmp xcha DShot_GCR_Pulse_Time_3, DShot_GCR_Pulse_Time_3_Tmp
mov DShot_GCR_Start_Delay, #DSHOT_TLM_START_DELAY_48ENDIF jnb Flag_Pgm_Bidir, init_start_bidir_done ; Check if bidirectional operation
mov C, Flag_Rcp_Dir_Rev ; Read force direction mov Flag_Pgm_Dir_Rev, C ; Set spinning direction
;**** **** **** **** ****; Motor start beginninginit_start_bidir_done: setb Flag_Startup_Phase ; Set startup phase flag mov Startup_Cnt, #0 ; Reset counter call comm5_comm6 ; Initialize commutation call comm6_comm1 call initialize_timing ; Initialize timing call calc_next_comm_timing ; Set virtual commutation point call initialize_timing ; Initialize timing call calc_next_comm_timing call initialize_timing ; Initialize timing
;**** **** **** **** **** **** **** **** **** **** **** **** ****;; Run entry point;;**** **** **** **** **** **** **** **** **** **** **** **** ****
; Run 1 = B(p-on) + C(n-pwm) - comparator A evaluated; Out_cA changes from low to highrun1: call wait_for_comp_out_high ; Wait for high; setup_comm_wait ; Setup wait time from zero cross to commutation; evaluate_comparator_integrity ; Check whether comparator reading has been normal call wait_for_comm ; Wait from zero cross to commutation call comm1_comm2 ; Commutate call calc_next_comm_timing ; Calculate next timing and wait advance timing wait; wait_advance_timing ; Wait advance timing and start zero cross wait; calc_new_wait_times; wait_before_zc_scan ; Wait zero cross wait and start zero cross timeout
; Run 2 = A(p-on) + C(n-pwm) - comparator B evaluated; Out_cB changes from high to lowrun2: call wait_for_comp_out_low; setup_comm_wait; evaluate_comparator_integrity call set_pwm_limit ; Set pwm power limit for low or high rpm call wait_for_comm call comm2_comm3 call calc_next_comm_timing; wait_advance_timing; calc_new_wait_times; wait_before_zc_scan
; Run 3 = A(p-on) + B(n-pwm) - comparator C evaluated; Out_cC changes from low to highrun3: call wait_for_comp_out_high; setup_comm_wait; evaluate_comparator_integrity call wait_for_comm call comm3_comm4 call calc_next_comm_timing; wait_advance_timing; calc_new_wait_times; wait_before_zc_scan
; Run 4 = C(p-on) + B(n-pwm) - comparator A evaluated; Out_cA changes from high to lowrun4: call wait_for_comp_out_low; setup_comm_wait; evaluate_comparator_integrity call wait_for_comm call comm4_comm5 call calc_next_comm_timing; wait_advance_timing; calc_new_wait_times; wait_before_zc_scan
; Run 5 = C(p-on) + A(n-pwm) - comparator B evaluated; Out_cB changes from low to highrun5: call wait_for_comp_out_high; setup_comm_wait; evaluate_comparator_integrity call wait_for_comm call comm5_comm6 call calc_next_comm_timing; wait_advance_timing; calc_new_wait_times; wait_before_zc_scan
; Run 6 = B(p-on) + A(n-pwm) - comparator C evaluated; Out_cC changes from high to lowrun6: Start_Adc ; Start adc conversion call wait_for_comp_out_low; setup_comm_wait; evaluate_comparator_integrity call wait_for_comm call comm6_comm1 call check_temp_and_limit_power call calc_next_comm_timing; wait_advance_timing; calc_new_wait_times; wait_before_zc_scan
; Check if it is direct startup jnb Flag_Startup_Phase, normal_run_checks
mov Pwm_Limit, Pwm_Limit_Beg ; Set initial max power clr C mov A, Startup_Cnt ; Load startup counter subb A, #24 ; Is counter above requirement? jnc startup_phase_done
jnb Flag_Rcp_Stop, run1 ; If pulse is above stop value - Continue to run ajmp run_to_wait_for_power_on
startup_phase_done: clr Flag_Startup_Phase ; Clear startup phase flag setb Flag_Initial_Run_Phase ; Set initial run phase flag mov Initial_Run_Rot_Cntd, #12 ; Set initial run rotation count mov Pwm_Limit, Pwm_Limit_Beg mov Pwm_Limit_By_Rpm, Pwm_Limit_Beg
normal_run_checks: ; Check if it is initial run phase jnb Flag_Initial_Run_Phase, initial_run_phase_done ; If not initial run phase - branch jb Flag_Dir_Change_Brake, initial_run_phase_done ; If a direction change - branch
; Decrement startup rotation count mov A, Initial_Run_Rot_Cntd dec A ; Check number of initial rotations jnz initial_run_check_startup_rot ; Branch if counter is not zero
clr Flag_Initial_Run_Phase ; Clear initial run phase flag setb Flag_Motor_Started ; Set motor started jmp run1 ; Continue with normal run
initial_run_check_startup_rot: mov Initial_Run_Rot_Cntd, A ; Not zero - store counter
jb Flag_Pgm_Bidir, initial_run_continue_run ; Check if bidirectional operation
jb Flag_Rcp_Stop, run_to_wait_for_power_on ; Check if pulse is below stop value
initial_run_continue_run: jmp run1 ; Continue to run
initial_run_phase_done: ; Reset stall count mov Startup_Stall_Cnt, #0 setb Flag_Motor_Running
; Exit run loop after a given time jb Flag_Pgm_Bidir, run6_check_timeout ; Check if bidirectional operation
mov Temp1, #250 mov Temp2, #Pgm_Brake_On_Stop mov A, @Temp2 jz ($+4)
mov Temp1, #3 ; About 100ms before stopping when brake is set
clr C mov A, Rcp_Stop_Cnt ; Load stop RC pulse counter low byte value subb A, Temp1 ; Is number of stop RC pulses above limit? jnc run_to_wait_for_power_on ; Yes, go back to wait for power on
run6_check_timeout: mov A, Rcp_Timeout_Cntd ; Load RC pulse timeout counter value jz run_to_wait_for_power_on ; If it is zero - go back to wait for power on
run6_check_dir: jnb Flag_Pgm_Bidir, run6_check_speed ; Check if bidirectional operation
jb Flag_Pgm_Dir_Rev, run6_check_dir_rev ; Check if actual rotation direction jb Flag_Rcp_Dir_Rev, run6_check_dir_change ; Matches force direction sjmp run6_check_speed
run6_check_dir_rev: jnb Flag_Rcp_Dir_Rev, run6_check_dir_change sjmp run6_check_speed
run6_check_dir_change: jb Flag_Dir_Change_Brake, run6_check_speed
setb Flag_Dir_Change_Brake ; Set brake flag mov Pwm_Limit, Pwm_Limit_Beg ; Set max power while braking jmp run4 ; Go back to run 4, thereby changing force direction
run6_check_speed: mov Temp1, #0F0h ; Default minimum speed jnb Flag_Dir_Change_Brake, run6_brake_done; Is it a direction change?
mov Pwm_Limit, Pwm_Limit_Beg ; Set max power while braking mov Temp1, #20h ; Bidirectional braking termination speed
run6_brake_done: clr C mov A, Comm_Period4x_H ; Is Comm_Period4x more than 32ms (~1220 eRPM)? subb A, Temp1 ljc run1 ; No - go back to run 1
jnb Flag_Dir_Change_Brake, run_to_wait_for_power_on ; If it is not a direction change - stop
; Turn spinning direction clr Flag_Dir_Change_Brake ; Clear brake mov C, Flag_Rcp_Dir_Rev ; Read force direction mov Flag_Pgm_Dir_Rev, C ; Set spinning direction setb Flag_Initial_Run_Phase mov Initial_Run_Rot_Cntd, #18 mov Pwm_Limit, Pwm_Limit_Beg ; Set initial max power jmp run1 ; Go back to run 1
run_to_wait_for_power_on_fail: jb Flag_Motor_Running, run_to_wait_for_power_on inc Startup_Stall_Cnt ; Increment stall count if motors did not properly start
run_to_wait_for_power_on: clr IE_EA ; Disable all interrupts call switch_power_off mov Flags1, #0 ; Clear flags1 mov Flags_Startup, #0 ; Clear startup flags
IF MCU_48MHZ == 1 Set_MCU_Clk_24MHz
; Scale DShot criteria for 24MHz setb C rrca DShot_Timer_Preset ; Scale sync timer preset
clr C rrca DShot_Frame_Length_Thr ; Scale frame length criteria
clr C rrca DShot_Pwm_Thr ; Scale pulse width criteria
; Scale DShot telemetry for 24MHz xcha DShot_GCR_Pulse_Time_1, DShot_GCR_Pulse_Time_1_Tmp xcha DShot_GCR_Pulse_Time_2, DShot_GCR_Pulse_Time_2_Tmp xcha DShot_GCR_Pulse_Time_3, DShot_GCR_Pulse_Time_3_Tmp
mov DShot_GCR_Start_Delay, #DSHOT_TLM_START_DELAYENDIF
setb IE_EA ; Enable all interrupts call wait100ms ; Wait for pwm to be stopped call switch_power_off
mov Temp1, #Pgm_Brake_On_Stop ; Check if using brake on stop mov A, @Temp1 jz run_to_wait_for_power_on_brake_done
AcomFET_on BcomFET_on CcomFET_on
run_to_wait_for_power_on_brake_done: jnb Flag_Rcp_Stop, ($+6) ; Check if RCP is zero, then it is a normal stop mov Startup_Stall_Cnt, #0
clr C mov A, Startup_Stall_Cnt subb A, #4 ; Maximum consecutive stalls before stopping ljc wait_for_power_on ; Go back to wait for power on
ljmp init_no_signal ; Stalled too many times
;**** **** **** **** **** **** **** **** **** **** **** **** ****
$include (BLHeliBootLoad.inc) ; Include source code for bootloader
;**** **** **** **** **** **** **** **** **** **** **** **** ****
CSEG AT 19FDhreset:ljmp pgm_start
END
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