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Ivo
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| PWM phase detection. How to do it ? |
 Posted: Fri Mar 27, 2009 5:44 am |
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Dear all, I'm not experienced in programming.
I'm making 5 channel PWM generator with PIC16F690. I have to control AC 220V lamps at a time and make some effects.
This is the code I use:
| Code: | #include <16F690.h>
#fuses INTRC_IO,NOWDT,NOPROTECT,NOBROWNOUT
#use delay(clock=8000000)
#bit led1=0x07.0 //PORTC.0
#bit led2=0x07.1
#bit led3=0x07.2
#bit led4=0x07.3
#bit led5=0x07.4
int x[6];
int y;
#int_TIMER0
void clock_isr()
{
disable_interrupts(INT_TIMER0);
if(y>x[1]) led1=0;
if(y>x[2]) led2=0;
if(y>x[3]) led3=0;
if(y>x[4]) led4=0;
if(y>x[5]) led5=0;
if(y++>200)
{
y=0;
if(x[1]>0) led1=1;
if(x[2]>0) led2=1;
if(x[3]>0) led3=1;
if(x[4]>0) led4=1;
if(x[5]>0) led5=1;
};
set_timer0(200);
enable_interrupts(INT_TIMER0);
}
void main()
{
setup_oscillator( OSC_8MHZ );
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
enable_interrupts(INT_TIMER0);
enable_interrupts(GLOBAL);
set_tris_c(0x00);
y=0;
while(1) //just for test
{
x[1]=50;
x[2]=4;
x[3]=10;
x[4]=100;
x[5]=0;
}
}
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I've tested it with 5 LEDs directly attached to PORT C of the PIC and everything is just fine. But when I attached the triacs and the lamps the things gone bad. The lamp is blinking with over 10 Hz. As I read, I need to do phase detection with 10 M resistor or opto coupler to pin B0. My question is how to correct the code to do the phase detection.
Thank you in advance ! |
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Gnusi
Guest
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| Posted: Fri Mar 27, 2009 8:38 am |
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| Ivo, just for information, where are you from? |
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Guest
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| Posted: Fri Mar 27, 2009 9:20 am |
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Bulgaria  |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Mar 27, 2009 12:30 pm |
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