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timer_20ms

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        #include <pic.h>

void main()
{
TRISC=0;    // PORTC output
PORTC=0;    // PORTC clear

T0CS=0;        // Internal clock select (Fosc/4)
PSA=0;        // Prescaler assigned to TMR0
PS2=1;
PS1=1;
PS0=0;        // 1:128 Prescaler ratio
TMR0=100;    // (256-156=100) for 156 increments
RC0=1;        // RC0 LED ON

while(1)
{
    if(T0IF==1){
    TMR0=100;
    RC0=!RC0;
    T0IF=0;    //clear overflow flag bit
    }
}
}

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