Hello,

I'm a newbie in these things and wondering how we can generate three phase (ab 25 kHz, 0 -5V) PWM in CCS C with PIC16/18. Thanx.

I know the single phase only below:

#include <16F72.h>
#use delay(clock=4000000)
#fuses NOWDT,XT, NOPROTECT
int value;

main()
{
setup_adc_ports( ALL_ANALOG );
setup_adc(ADC_CLOCK_INTERNAL );
setup_timer_2 ( T2_DIV_BY_4, value, 2);
set_adc_channel( 0 );
setup_ccp1(CCP_pwm);
while(true)
{
delay_ms(100);
value = read_adc();
setup_timer_2 ( T2_DIV_BY_16, value, 2);
}
}

 

I don't think that code is for generating pwm.
I guess this is good attempt at fishing for answers using bogus code.

 

There are a few Picmicro app notes on 3 phase, AN900 for one.
Max.

 

I don't think that code is for generating pwm.
I guess this is good attempt at fishing for answers using bogus code.

Why dont u test the above code b4 u make sluggish comment?

 

shteii01 is right. That code looks like an analog read.

You should look into the pwm units in most pics. You can generate very precise PWM signals.

They are called ECCP (enhanced capture / compare / PWM) modules. Very easy to use.