CDI Ignition - programmable conditioning stage.

[sysavm]

cdi.png (148.01 KiB) Viewed 1560 times

Hi gurus,

Good day.

I'm trying to build my own programmable conditioning stage that can be added to simple CDI units for motorcycles.

Having an oscilloscope and signal generator is what I can think most useful tool for this project but Affordability is my main issue.
That is why I would like to have anyone's opinion/ideas/comments to further improve my code / algorithm.

I will be using ATTINY85 and my target RPM if possible is from 500 (or lower) to 16000 rpm (or higher).

Below is my code.

Regards,

Tony

Code: Select all

unsigned short int pulse=0;
unsigned long int tick=0, ovf=0; delay=0;           //variables will be optimized later.

void main() {

     DDRB = ( 1 << DDB3 ) | ( 0 << DDB2);
     PORTB = ( 0 << PORTB3 );
     MCUCR = ( 1 << ISC01 ) | ( 1 << ISC00 ) ;          //detect rising edge
     TCCR1 = ( 1 << CS13 ) | ( 1 << CS12 ) | ( 0 << CS11 ) | ( 1 << CS10 ) ;
     GIMSK = ( 1 << INT0 ) ;               //enable INTO interrupt
     SREG_I_bit = 1;                       //enable Global Interrupt

     while(1){
     }
}

void interrupt_INT0() iv IVT_ADDR_INT0 ics ICS_OFF{               // Interrupt INT0 runtine
    
     if(pulse==1){
         tick=ovf+TCNT1;
         TCNT1 = 0;
          for( delay=0; delay <=tick; delay++){                    // waiting time before spark
              Delay_ms(10);                                       // tick will be mapped to EEPROM table values or to Variable array..
         }
     PORTB = (1 << PORTB3);  // spark on
     Delay_us(200);          // spark on time
     PORTB = (0 << PORTB3);  // spark off
     tick=0;
     ovf=0;
     TCNT=0;
     }
      if(pulse==0){           // 1st sensor triggered
                pulse=1;
                tick=0;
                TIMSK = ( 1 << TOIE1 ) ;          // TIMER1 ENABLE AND START
                TCNT1 = 0;
     }
}

void interrupt_TIMER1() iv IVT_ADDR_TIMER1_OVF ics ICS_OFF{  // TIMER1 overflows. If sensor not being triggered.
     ovf=ovf+255; //since TCNT1 is declared to 0. 
     TCNT1=0;
}

[sysavm]

btw. Currently I'm using 8MHZ internal crystal and prescaler can be optimized later.