CCS/TMS320F28027F: EPWM CONFIG

Part Number:TMS320F28027F

Tool/software: Code Composer Studio

Hey Everyone ,

I am configuring the PWM of 20kHz  for which I am Using TBPRD =1500,the code is written below but the thing is the  the duty cycle does not work beyond  CMPA=550, i.e the output goes always low as i touch the value more than 450 the picture is also attached for reference from which the yellow is EPWM1 and blue is EPWM2. Can some please help with this problem

#include "DSP28x_Project.h"

#define EPWM1_TIMER_TBPRD  1500

void GPIO_SELECT(void);
void INIT_ePWM1(void);
void INIT_ePWM2(void);

int Input(void);

int main(void)
{

   #ifdef _FLASH
     memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
    #endif

   InitSysCtrl();
   GPIO_SELECT();

   for(;;) {
       INIT_ePWM1();
       INIT_ePWM2();
    
   }
}

void GPIO_SELECT(void)
{
    EALLOW;
    GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO2 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO3 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO4 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO5 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO6 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO7 = 0;
    GpioCtrlRegs.GPAPUD.bit.GPIO12 = 0;

    GpioCtrlRegs.GPAMUX1.bit.GPIO0= 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO2= 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO4= 1;

    GpioCtrlRegs.GPAMUX1.bit.GPIO5= 0;
    GpioCtrlRegs.GPAMUX1.bit.GPIO6= 0;
    GpioCtrlRegs.GPAMUX1.bit.GPIO7= 0;

    GpioCtrlRegs.GPAMUX1.bit.GPIO1= 0;
    GpioCtrlRegs.GPAMUX1.bit.GPIO3= 0;
    GpioCtrlRegs.GPAMUX1.bit.GPIO12= 0;

    GpioCtrlRegs.GPADIR.bit.GPIO5 = 0;
    GpioCtrlRegs.GPADIR.bit.GPIO6 = 0;
    GpioCtrlRegs.GPADIR.bit.GPIO7 = 0;

    GpioCtrlRegs.GPADIR.bit.GPIO1 = 1;
    GpioCtrlRegs.GPADIR.bit.GPIO3 = 1;
    GpioCtrlRegs.GPADIR.bit.GPIO12 = 1;
    EDIS;
}

void INIT_ePWM1(void)
{
    EPwm1Regs.TBPRD= EPWM1_TIMER_TBPRD ;
    EPwm1Regs.TBPHS.half.TBPHS= 0;
    EPwm1Regs.TBCTR= 0x0000;

    EPwm1Regs.CMPA.half.CMPA = 550;

    EPwm1Regs.TBCTL.bit.CTRMODE = 0x2;
    EPwm1Regs.TBCTL.bit.PHSEN=0x0;
    EPwm1Regs.TBCTL.bit.SYNCOSEL=0x1;

    EPwm1Regs.CMPCTL.bit.SHDWAMODE = 0x0;
    EPwm1Regs.CMPCTL.bit.LOADAMODE = 0x0;

   EPwm1Regs.AQCTLA.bit.ZRO = 0x1;
   EPwm1Regs.AQCTLA.bit.PRD = 0x0;
    EPwm1Regs.AQCTLA.bit.CAU = 0x2;
    EPwm1Regs.AQCTLA.bit.CAD = 0x1;
};

void  INIT_ePWM2(void) {

     EPwm2Regs.TBPRD= EPWM1_TIMER_TBPRD ;
     EPwm2Regs.TBPHS.half.TBPHS= 0;
     EPwm2Regs.TBCTR= 0x0000;

     EPwm2Regs.CMPA.half.CMPA = 450;

     EPwm2Regs.TBCTL.bit.CTRMODE = 0x2;
     EPwm2Regs.TBCTL.bit.PHSEN=0x0;
     EPwm2Regs.TBCTL.bit.SYNCOSEL=0x1;

     EPwm2Regs.CMPCTL.bit.SHDWAMODE = 0x0;
     EPwm2Regs.CMPCTL.bit.LOADAMODE = 0x0;

     EPwm2Regs.AQCTLA.bit.ZRO = 0x1;
     EPwm2Regs.AQCTLA.bit.PRD = 0x0;
     EPwm2Regs.AQCTLA.bit.CAU = 0x2;
     EPwm2Regs.AQCTLA.bit.CAD = 0x1;
 };