Added spaces and cleaning up the structure.

programmer/programmer.ino

@@ -16,7 +16,7 @@
 #define C2D_PORT    PORTB           // D10
 #define C2D_PIN     2               // D10
 
-// Digital pin 3 on Mega
+// Digital pin D11 on arduino nano
 #define C2CK_PORT   PORTB           // D11
 #define C2CK_PIN    3               // D11
 
@@ -58,6 +58,7 @@ static unsigned char c2_read_bits (unsigned char len) {
     unsigned char i, data, mask;
     mask = 0x01 << (len-1);
     data = 0;
+
     //pinMode(C2D, INPUT);
     DDRB &= ~(1<<C2D_PIN);
     PINB &= (1<<C2D_PIN);
@@ -74,8 +75,10 @@ static unsigned char c2_read_bits (unsigned char len) {
     return data;
 }
 
+
 static void c2_send_bits(unsigned char data, unsigned char len) {
     unsigned char i;
+
     //pinMode(C2D, OUTPUT);
     DDRB |= (1<<C2D_PIN);
     for(i=0; i<len; i++) {
@@ -89,6 +92,7 @@ static void c2_send_bits (unsigned char data, unsigned char len) {
     }
 }
 
+
 static void c2_write_data(unsigned char data) {
     unsigned char retval;
     c2_send_bits(0x0, 1);
@@ -102,18 +106,21 @@ static void c2_write_data (unsigned char data) {
     c2_send_bits(0x0, 1);
 }
 
+
 static unsigned char c2_poll_bit_high(unsigned char mask) {
     unsigned char retval;
     retval = c2_read_addr();
     while((retval&mask)==0) retval = c2_read_addr();
 }
 
+
 static unsigned char c2_poll_bit_low(unsigned char mask) {
     unsigned char retval;
     retval = c2_read_addr();
     while(retval&mask) retval = c2_read_addr();
 }
 
+
 unsigned char c2_read_flash_block(unsigned int addr, unsigned char * data, unsigned char len) {
     unsigned char retval,i;
     c2_write_addr(0xB4);
@@ -255,22 +262,13 @@ void setup() {
     DDRB |= (1<<C2CK_PIN);
     C2CK_PORT |= (1<<C2CK_PIN);
 
+    // Startup indicator
+    for(int i = 0; i < 10; i++) {   
         digitalWrite(LED, HIGH);
-  delay(500);
-  digitalWrite(LED, LOW);
-
-  // pinMode(11, OUTPUT);
-  // pinMode(12, OUTPUT);
-
-  // testing
-    /*
-  for(int i=0; i < 100; i++) {
-    C2CK_PORT &= ~(1<<C2CK_PIN);
         delay(50);
-    C2CK_PORT |= (1<<C2CK_PIN);
+        digitalWrite(LED, LOW);
         delay(50);
     }
-    */
 }
 
 unsigned int i;
@@ -289,13 +287,15 @@ unsigned char rx_state_machine (unsigned char state, unsigned char rx_char) {
     if(state==1) {
         bytes_to_receive = rx_char;
         rx_message[rx_message_ptr++] = rx_char;
-      if (bytes_to_receive==0) return 3;
+        if(bytes_to_receive==0)
+            return 3;
         return 2;
     }
     if(state==2) {
         rx_message[rx_message_ptr++] = rx_char;
         bytes_to_receive--;
-      if (bytes_to_receive==0) return 3;
+        if(bytes_to_receive==0)
+            return 3;
     }
     return state;  
 }