How set PWM for PIC 16F877A

[Rooney_04]

hi
how i could set this PWM for 20MHz in the PIC 16F877A? if i could get the source code should be better since i m new to PIC programming

 

[john blue]

Here you go: But this is varying pwm. Modify the for loop accordingly.

#include <htc.h>
#include <pic.h>

void main ()
{
int a=0xFF;
TRISC=0x00;
CCP1CON=0x0C;
PR2=0xFF; // set PWM period for approximately 19.53KHz
for(CCPR1L=0xFF,CCPR1H=0xFF;CCPR1L>0x00,CCPR1H>0x00;CCPR1L--,CCPR1H--)
_delay(100000);
T2CON=0x04;
}

 

[incomplete_jerin]

By the way you could get better programs while you google @ net.Try to learn the programming & try to do it of your own.
Regards,
Jerin.

 

[Rooney_04]

If i could program that with the given code. Could i test it to the Proteus to see the graph?

 

[incomplete_jerin]

Here is a code for PWM in assembly language done in MPLAB compiler.
Regards,
Jerin.

 

[Rooney_04]

hi thanks..
but the compiler i using is PIC C compiler. so the MPLAB source code you(incomplete_jerin) given me can be used in this compiler huh?

 

[john blue]

for incomplete_jerin code, you only need MPLAB because it is already in ASM

---------- Post added at 13:38 ---------- Previous post was at 13:36 ----------

yup, using oscilloscope. I tested it with proteus sim =)