unsigned char sin_table[64]={0, 10, 21, 31, 41, 50, 59, 68, 76, 83, 89,
94, 99, 102, 105, 106, 107, 106, 105, 102, 99, 94, 89, 83, 76, 68, 59,
50, 41, 31, 21, 10};
unsigned int TBL_POINTER_NEW, TBL_POINTER_OLD, TBL_POINTER_SHIFT, SET_FREQ;
unsigned int TBL_temp;
unsigned char DUTY_CYCLE;
void interrupt(){
if (TMR2IF_bit == 1){
TBL_POINTER_NEW = TBL_POINTER_OLD + SET_FREQ;
if (TBL_POINTER_NEW < TBL_POINTER_OLD){
CCP1CON.P1M1 = ~CCP1CON.P1M1; //Reverse direction of full-bridge
}
TBL_POINTER_SHIFT = TBL_POINTER_NEW >> 10;
DUTY_CYCLE = TBL_POINTER_SHIFT;
CCPR1L = sin_table[DUTY_CYCLE];
TBL_POINTER_OLD = TBL_POINTER_NEW;
TMR2IF_bit = 0;
}
}
void main() {
SET_FREQ = 256;
TBL_POINTER_SHIFT = 0;
TBL_POINTER_NEW = 0;
TBL_POINTER_OLD = 0;
DUTY_CYCLE = 0;
//ANSEL = 0; //Disable ADC commenetd myself
// CMCON0 = 7; //Disable Comparator commenetd myself
//PR2 = 249;
PR2=187; ///for 16Khz at 12MHZ of quartz
// TRISC = 0x3F; commenetd myself
TRISB=0x3F;//defined myself for PWM output pins
CCP1CON = 0x4C;
TMR2IF_bit = 0;
T2CON = 4; //TMR2 on, prescaler and postscaler 1:1
while (TMR2IF_bit == 0);
TMR2IF_bit = 0;
TRISB=0; //defined my self for PWM out
// TRISC = 0; commenetd myself the PIC doesn't have portc
TMR2IE_bit = 1;
GIE_bit = 1;
PEIE_bit = 1;
while(1);
}