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PIC16F88 and PWM

 
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PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Jun 24, 2008 12:09 pm     Reply with quote
I stripped your program down somewhat by getting rid of all the printf
statements, and then I compiled it with vs. 4.074 and ran it on a
PicDem2-Plus board. It works. I see PWM output on pin B0.
Code:

#include <16F88.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)

//==========================================
void main()
 {
byte value;

value = 0;

setup_ccp1(CCP_PWM);
setup_timer_2(T2_DIV_BY_4, 255, 1);
set_pwm1_duty(0); // PWM off

delay_ms(1000);

while(1)
  {
   value++;
   set_pwm1_duty(value);
   delay_ms(100);
  }

}


--------
Edit: Initialized 'value' to 0.

Last edited by PCM programmer on Wed Aug 26, 2009 7:13 pm; edited 1 time in total
xavier



Joined: 10 Feb 2004
Posts: 7

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PIC16F88 and PWM
PostPosted: Wed Jun 25, 2008 1:38 am     Reply with quote
Many thanks PCM programmer for your help I found my pb ! (you mention RB0 in your post)

It was just because my scope was on RB3 instead of RB0 !!!
I'm so sorry i was sure pwm pin was RB3. (as i said on my first post)

Anyway all is working fine now ( since the beginning in fact ! )

Thanks again
Xavier
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