static void tiHSetupPeripheral(void) {
unsigned int PTPERvalue = pwm_period;
unsigned int SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value;
SEVTCMPvalue = sevtcmp_pwm;
PTCONvalue = PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 &
PWM_IPCLK_SCALE1 & PWM_MOD_FREE;
PWMCON1value = PWM_MOD1_IND & PWM_PEN1L & PWM_MOD2_IND & PWM_PEN2L &
PWM_MOD3_IND & PWM_PEN3L & PWM_MOD4_IND & PWM_PEN4L;
PWMCON2value = PWM_SEVOPS4 & PWM_OSYNC_TCY & PWM_UEN;
ConfigIntMCPWM(PWM_INT_DIS & PWM_FLTA_DIS_INT & PWM_FLTB_DIS_INT);
//Call Microchip library setup function
OpenMCPWM(PTPERvalue, SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value);
}
void SetupPWM(void){
LATB = 0x0000;
TRISB = 0b0000011011111011;
PORTBbits.RB8 = 0;
PORTBbits.RB11 = 0;
unsigned int SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value;
SEVTCMPvalue = 160; //Special event compare register triggers special event
//SEVTCMPvalue = 4839; //Special event compare register triggers special event
//at this point in the PWM period. Useful for sampling
//back EMF when motor is turned off, for example.
//Values larger than 4839 for a time base of 4999 give
//unreliable results. Consequently, running the motor
//at greater than 96.7% duty cycle means you cannot
//sense back EMF.
PTCONvalue = PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 &
// PWM_IPCLK_SCALE4 & PWM_MOD_FREE;
PWM_IPCLK_SCALE16 & PWM_MOD_FREE;
PWMCON1value = PWM_MOD1_IND & PWM_PEN1L & PWM_PEN1H &
PWM_MOD2_IND & PWM_PEN2L & PWM_PEN2H &
PWM_MOD3_IND & PWM_PEN3L & PWM_PEN3H;
PWMCON2value = PWM_SEVOPS1 & PWM_OSYNC_TCY & PWM_UEN;
ConfigIntMCPWM(PWM_INT_DIS & PWM_FLTA_DIS_INT & PWM_FLTB_DIS_INT);
OpenMCPWM(PTPERvalue, SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value);
P1OVDCONbits.POVD1L = 1;
P1OVDCONbits.POVD1H = 1;
P1OVDCONbits.POVD2L = 1;
P1OVDCONbits.POVD2H = 1;
P1OVDCONbits.POVD3L = 1;
P1OVDCONbits.POVD3H = 1;
SetDCMCPWM(1, 0, 0);
SetDCMCPWM(2, 0, 0);
SetDCMCPWM(3, 0, 0);
}
static void mcSetupPeripheral(void) {
//unsigned int PTPERvalue = 10000;
unsigned int PTPERvalue = 2000;
//unsigned int PTPERvalue = 2000;
unsigned int SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value;
SEVTCMPvalue = 1920;
SEVTCMPvalue = 9940;
SEVTCMPvalue = 1988; // ok up to 96% of time base, according to Aaron
// SEVTCMPvalue = 160; // Special Event Trigger Compare Value for ADC in phase with PWM
//PTCONvalue = PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 &
// PWM_IPCLK_SCALE4 & PWM_MOD_FREE;
PTCONvalue = PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 &
PWM_IPCLK_SCALE1 & PWM_MOD_FREE;
PWMCON1value = PWM_MOD1_IND & PWM_PEN1L & PWM_MOD2_IND & PWM_PEN2L &
PWM_MOD3_IND & PWM_PEN3L & PWM_MOD4_IND & PWM_PEN4L;
PWMCON2value = PWM_SEVOPS1 & PWM_OSYNC_TCY & PWM_UEN;
ConfigIntMCPWM(PWM_INT_DIS & PWM_FLTA_DIS_INT & PWM_FLTB_DIS_INT);
SetDCMCPWM(1, 0, 0);
OpenMCPWM(PTPERvalue, SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value);
SetDCMCPWM(2, 0, 0);
OpenMCPWM(PTPERvalue, SEVTCMPvalue, PTCONvalue, PWMCON1value, PWMCON2value);
//Stan's
// For 1KHz at MIPS == 40
/*
pwm_period_ = 624;
ConfigIntMCPWM(PWM_INT_DIS & PWM_FLTA_DIS_INT & PWM_FLTB_DIS_INT);
PTPER = pwm_period_;
PWMCON1bits.PMOD1 = 1;
PWMCON1bits.PMOD2 = 1;
PWMCON1bits.PMOD3 = 0;
PWMCON1bits.PMOD4 = 0;
PWMCON1bits.PEN1H = 0;
PWMCON1bits.PEN2H = 0;
PWMCON1bits.PEN3H = 0;
PWMCON1bits.PEN4H = 0;
PWMCON1bits.PEN1L = 1;
PWMCON1bits.PEN2L = 1;
PWMCON1bits.PEN3L = 0;
PWMCON1bits.PEN4L = 0;
PWMCON2bits.SEVOPS = 1; // postscale 1:1
PWMCON2bits.OSYNC = 0;
PWMCON2bits.IUE = 1;
PWMCON2 |= PWM_UEN;
P1SECMPbits.SEVTDIR = 1;
PTCONbits.PTMOD = 0; // Free running mode
PTCONbits.PTOPS = 0b11; // postscale 1:1
PTCONbits.PTCKPS = 0b11; // postscale 1:64
PTCONbits.PTSIDL = 0; // runs in CPU idle mode
PTCONbits.PTEN = 1;
PDC1 = 0x35; // duty cycle = 0
PDC2 = 0x35;
SEVTCMP = 600; // Special Event Trigger Compare Value for ADC in phase with PWM
//P1SECMPbits.SEVTCMP = 600;
AD1CON1bits.SSRC = 0b011;
*/
}
