Help needed - PWM generation using PIC16F676

Ian Rogers said:

Now the only difference between you code and mine.. I dont use the XC compiler or MPLABX

Here's mine

Code:

#include<htc.h>
#define _XTAL_FREQ  4000000
__CONFIG(0x31C4);


int OnPulse = 217;
int OffPulse = 38;
char TOG = 0;
int i = 0;

void interrupt Interrupt_Service_Subroutine(void)
    {
        T0IF = 0;
        i += 1;
    TOG = ~TOG;

        if(i>=8000)    // two seconds
        {
                i=0;
        }

    if(i<=4000)     // First second 85%
        {
        if(TOG)
            {
            RA5 = 1;
            TMR0 = 217;
            }

        else
            {
            RA5 = 0;
            TMR0 = 38;
            }
        }

        if(i>4000)    // Second second 5%
        {
        if(TOG)       
            {
            RA5 = 1;
            TMR0 = 13;
            }
        else
            {
            RA5 = 0;
            TMR0 = 242;
            }
        }
    }


void main()
    {
    int pulse;
    TRISCbits.TRISC3 = 0;
        TRISCbits.TRISC0 = 1;
    TRISAbits.TRISA5 = 0;
    CMCON = 7;
    TMR0 = OnPulse;
    ANSEL = 0x10;
    OPTION_REG = 0;
    T0IE = 1;
    GIE = 1;
        RC3=1;

    while(1)
        {

        }
   }

You'll notice that the config bits are always set correctly as I use a HEX value..

Click to expand...