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Added angle and gyro readings

master
Englebert 3 years ago
parent
95ee61f22c
commit
dc11297c68
3 changed files with 56 additions and 13 deletions
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  1. 46
      src/gyro.cpp
  2. 5
      src/gyro.h
  3. 14
      src/main.cpp

46
src/gyro.cpp
View File

@ -190,9 +190,9 @@ void GYRO::calculate_imu_error(void) {
GyZ = read_register(GYRO_ZOUT_H) << 8 | read_register(GYRO_ZOUT_L);
// Sum all readings
GyroErrorX = GyroErrorX + (GyX / 131.0);
GyroErrorY = GyroErrorY + (GyY / 131.0);
GyroErrorZ = GyroErrorZ + (GyZ / 131.0);
GyroErrorX = GyroErrorX + (GyX / 16.4);
GyroErrorY = GyroErrorY + (GyY / 16.4);
GyroErrorZ = GyroErrorZ + (GyZ / 16.4);
c++;
}
@ -211,6 +211,43 @@ void GYRO::calculate_imu_error(void) {
}
void GYRO::read_accelerometer(void) {
AcX = read_register(ACCEL_XOUT_H) << 8 | read_register(ACCEL_XOUT_L);
AcY = read_register(ACCEL_YOUT_H) << 8 | read_register(ACCEL_YOUT_L);
AcZ = read_register(ACCEL_ZOUT_H) << 8 | read_register(ACCEL_ZOUT_L);
// Calculating Roll and Pitch from the accelerometer data
accAngleX = (atan(AcY / sqrt(pow(AcX, 2) + pow(AcZ, 2))) * 180 / PI) - 0.58; // AccErrorX ~(0.58) See the calculate_IMU_error()custom function for more details
accAngleY = (atan(-1 * AcX / sqrt(pow(AcY, 2) + pow(AcZ, 2))) * 180 / PI) + 1.58; // AccErrorY ~(-1.58)
}
void GYRO::read_gyro(void) {
// Read Gyro data
previousTime = currentTime; // Previous time is stored before the actual time read
currentTime = millis(); // Current time actual time read
elapsedTime = (currentTime - previousTime) / 1000; // Divide by 1000 to get seconds
GyX = (read_register(GYRO_XOUT_H) << 8 | read_register(GYRO_XOUT_L)) / 16.4; // For a 2000deg/s range we have to divide first the raw value by 16.4, according to the datasheet
GyY = (read_register(GYRO_YOUT_H) << 8 | read_register(GYRO_YOUT_L)) / 16.4;
GyZ = (read_register(GYRO_ZOUT_H) << 8 | read_register(GYRO_ZOUT_L)) / 16.4;
// Correct the outputs with the calculated error values
// GyroX = GyroX + 0.56; // GyroErrorX ~(-0.56)
// GyroY = GyroY - 2; // GyroErrorY ~(2)
// GyroZ = GyroZ + 0.79; // GyroErrorZ ~ (-0.8)
// Currently the raw values are in degrees per seconds, deg/s, so we need to multiply by sendonds (s) to get the angle in degrees
gyroAngleX = GyX * elapsedTime; // deg/s * s = deg
gyroAngleY = GyY * elapsedTime;
yaw = GyZ * elapsedTime;
// Complementary filter - combine acceleromter and gyro angle values
roll = 0.96 * gyroAngleX + 0.04 * accAngleX;
pitch = 0.96 * gyroAngleY + 0.04 * accAngleY;
}
void GYRO::read_all(void) {
AcX = read_register(ACCEL_XOUT_H) << 8 | read_register(ACCEL_XOUT_L);
AcY = read_register(ACCEL_YOUT_H) << 8 | read_register(ACCEL_YOUT_L);
@ -225,7 +262,6 @@ void GYRO::read_all(void) {
GyZ = read_register(GYRO_ZOUT_H) << 8 | read_register(GYRO_ZOUT_L);
temperatureG = read_register(TEMP_OUT_L);
}
@ -315,7 +351,7 @@ void GYRO::calculate_angles(void) {
// Initialization
for(axis = 0; axis < 3; axis++) {
// valid as long as LPF_FACTOR is less than 15
imu.accSmooth[axis] = LPFAcc[axis]>>ACC_LPF_FACTOR;
imu.accSmooth[axis] = LPFAcc[axis] >> ACC_LPF_FACTOR;
LPFAcc[axis] += imu.accADC[axis] - imu.accSmooth[axis];
// used to calculate later the magnitude of acc vector

5
src/gyro.h
View File

@ -217,6 +217,8 @@ class GYRO {
uint8_t read_register(uint8_t addr);
bool write_register(uint8_t addr, uint8_t data);
void read_all(void);
void read_accelerometer(void);
void read_gyro(void);
void rotateV32(t_int32_t_vector *v, int16_t* delta);
float InvSqrt(float x);
int16_t _atan2(int32_t y, int32_t x);
@ -229,7 +231,8 @@ class GYRO {
float roll, pitch, yaw;
float AccErrorX, AccErrorY, GyroErrorX, GyroErrorY, GyroErrorZ;
float accAngleX, accAngleY;
float accAngleX, accAngleY, gyroAngleX, gyroAngleY;
float elapsedTime = 0, currentTime = 0, previousTime = 0;
private:
};

14
src/main.cpp
View File

@ -612,8 +612,9 @@ void taskMeasurements(void *pvParameters) {
sprintf(buffer_gyro, "Gyro: %d %d %d %d %d %d Cycle: %d Bat: %.2fv Temp: %.2fC Alt: %dcm T: %d Y: %d P: %d R: %d", AcX, AcY, AcZ, GyX, GyY, GyZ, cycleTime, battery.volt, baro.temperature, alt.EstAlt, rcData[THROTTLE], rcData[YAW], rcData[PITCH], rcData[ROLL]);
#else
sprintf(buffer_gyro,
"Gyro: %d %d %d %d %d %d Temperature: %d Motor: %d Cycle: %d RC: %d Bat: %.2fv T: %d Y: %d P: %d R: %d FS: %d\nAccAngleX: %.4f, AccAngleY: %.4f",
AcX, AcY, AcZ, GyX, GyY, GyZ, temperatureG, motors.counts, cycleTime, rc_counts, battery.volt, rcData[THROTTLE], rcData[YAW], rcData[PITCH], rcData[ROLL], failsafeCnt, gyro.accAngleX, gyro.accAngleY);
"Gyro: %d %d %d %d %d %d Temperature: %d Motor: %d Cycle: %d RC: %d Bat: %.2fv T: %d Y: %d P: %d R: %d FS: %d\nAccAngleX: %.4f, AccAngleY: %.4f, GyroAngleX: %.4f, GyroAngleY: %.4f, Roll: %.4f, Pitch: %.4f, Yaw: %.4f",
AcX, AcY, AcZ, GyX, GyY, GyZ, temperatureG, motors.counts, cycleTime, rc_counts, battery.volt, rcData[THROTTLE], rcData[YAW], rcData[PITCH], rcData[ROLL], failsafeCnt, gyro.accAngleX, gyro.accAngleY,
gyro.gyroAngleX, gyro.gyroAngleY, gyro.roll, gyro.pitch, gyro.yaw);
#endif
// Reset counter
@ -1085,18 +1086,21 @@ void compute_imu(void) {
///// #endif
// Reading ACC and Gyro values
gyro.read_all();
// gyro.read_all();
gyro.read_accelerometer();
gyro.read_gyro();
// IMU.cpp at multiwii....
ACC_ORIENTATION(AcX, AcY, AcZ);
acc_common();
// Calcualtions
gyro.calculate_angles_beta();
GYRO_ORIENTATION(GyX, GyY, GyZ); // Range +/- 8192; +/- 2000 deg/sec?
gyro_common();
// Calcualtions
gyro.calculate_angles();
for(axis = 0; axis < 3; axis++)
gyroADCinter[axis] = imu.gyroADC[axis];

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