16f628a HPWM

[OzanGazi]

Hi all,

I cannot get pwm signal on pin_b3. Is this code wrong ??


#include <16f628a.h>
#use delay (clock=4000000)
#fuses intrc_io,Brownout,NOWDT,PROTECT,NOLVP,put,cpd,nomclr

void main()
{

setup_ccp1(CCP_PWM); // Configure CCP1 as a PWM
setup_timer_2(T2_DIV_BY_4, 127, 1);

set_tris_b(0);

while(true)
{
set_pwm1_duty(127);
delay_ms(20);

}

}

[Abdulla M.A.]

Hi,
this is the program with duty cycle=50%
if you have any question, you can ask.

#include <16f628a.h>
#use delay(clock=4000000)
#fuses xt,nowdt,nocpd,noprotect,nolvp

void main()
{
set_tris_b(0x00);
setup_ccp1(ccp_pwm);
set_pwm1_duty(500); //50% duty cycle
setup_timer_2(t2_div_by_4,249,1);

}

Abdulla
_________________
"A scientist can discover a new star, but he cannot make one. He would have to ask an engineer to do that."
"For an optimist the glass is half full, for a pessimist it's half empty, and for an engineer is twice bigger than necessary."

[OzanGazi]

Ok it works Thank you...

But still there is a problem..

while(true)
{

if(++MotorPower>1000)
{
MotorPower=0;
}

delay_ms(2);
set_pwm1_duty(MotorPower);

}

PWM output works with %50 fixed duty ratio..But when i put this code in program PWM signal stops and pin_B3 stay on "0"..What do you say for this condition ??

[Abdulla M.A.]

welcome