fix: remove the button and use only ADC.

Author: mohamed hassanin

PWMed 120 conduction 3-phase inverter/PWMed 120 conduction 3-phase inverter/main.c

@@ -30,6 +30,7 @@ void init_timers(void){
  TCCR4A |= 1 << COM4A1 | 1 << COM4A0 | 1 << COM4B1;
 
  TCCR5A |= 1 << COM5B1;
+ TIMSK5 |= 1 << TOIE1;
 
  OCR1A = ICR1 * 2 /3 ;
  OCR3A = OCR1A; // +1 and -1 to add some dead time between switches
@@ -47,35 +48,30 @@ void init_timers(void){
 
  GTCCR = 0;
 }
-
+volatile int curADC, prevADC;
 void init_adc(void){ //A0
  ADMUX |= (1 << REFS0) ;
  ADCSRA |= (1 << ADEN) | (1 << ADPS1) | (1 << ADPS2);
 }
 
-void init_int0(void){
- EICRA |= (1 << ISC00) | (1 << ISC01);
- EIMSK |= (1 << INT0); //21
-}
-void int0(void);
-
-ISR(INT0_vect){
- int0();
-}
 
-void int0(void){ 
- GTCCR = (1<<TSM)|(1<<PSRSYNC); // halt all timers
+ISR(TIMER5_OVF_vect){ 
+//ADSC
+ADCSRA |= (1<<ADSC);
+while( ADCSRA & (1<<ADSC) );
+curADC = ADC;
+if (!((curADC < (prevADC + 5)) && (curADC > (prevADC - 5)))){
+prevADC = curADC;
+
+GTCCR = (1<<TSM)|(1<<PSRSYNC); // halt all timers
  TCNT1 = ICR1/3; //shift left //initial value 50% shift
  TCNT3 = 0; //stationary
  TCNT4 = -1 * TCNT1; //shift right the same amount
 
+ OCR5B = (ICR5 - 1) * (prevADC / 1023.0);
 
- ADCSRA |= (1<<ADSC);
- while( ADCSRA & (1<<ADSC) ){};
- adc10 = ADC;
- OCR5B = (ICR5 - 1) * (adc10 / 1023.0);
- 
- GTCCR=0;
+ GTCCR=0;
+ }
 } 
 
 int main(void)
@@ -87,7 +83,9 @@ int main(void)
  DDRH |= 1 << PINH3 | 1 << PINH4;
  DDRL |= 1 << PINL4;
  init_adc();
- init_int0();
+ ADCSRA |= (1<<ADSC);
+ while( ADCSRA & (1<<ADSC) );
+ prevADC = ADC;
  init_timers();
  sei();
  while (1)