zero crossing detection code question

[maoterk]

I would like to do zero crossing detection on a 50Hz signal to fire triacs.
Would this code work?

#include <33EP512MU810.h>
#use delay(clock=4000000)
#byte PORTD=0xF81
#byte PORTB =0xF83

void init_all (void);
float32 sin;
int VCC=5;
              
void main() {
init_all();

WHILE (TRUE){
adc=(((float)read_adc()*VCC)/1023);
if (adc<1.63 && adc>1.57){
   delay_ms(1);
   output_high(PIN_D1);
   delay_us(60);
   output_low(PIN_D1);
   }
   }
}

void init_all(void){

set_tris_b(0xff); 
set_tris_d(0x00); 

setup_adc_ports( sAN0 | VSS_VDD );
setup_adc ( ADC_CLOCK_INTERNAL ); 
set_adc_channel ( 0 ); 
}

thanks

 

[D.A.(Tony)Stewart]

Who knows,

All it takes is a square wave line clock going thru an RC delay of 50us on one side of an XOR gate while driving both inputs to produce a positive reliable ZCS pulse with the leading edge being exactly at the zero crossing. **broken link removed**