CCS/TMS320F28027: PWM issue

Hi Madhuri,

Madhuri Depuru said:

Please help

Try this out:

     EALLOW;  
       SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;      // DISABLE TBCLK TILL EPWM CONFIGURATION 
     EDIS; 
     
     //ePWM1 Configuration
     //ePWM2 Configuration
 

     EALLOW;  
         SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;      // ENABLE TBCLK AFTER EPWM CONFIGURATION 
     EDIS; 

Regards,

Gautam

Hello Gautam,

I guess I have already incorporated that part in my program, still I am not able to get the result. I am including pwm part of the program. please help.

void InitEPwm1()
{

    CLK_disableTbClockSync(myClk);
    CLK_enablePwmClock(myClk, PWM_Number_1);
    GPIO_setPullUp(myGpio, GPIO_Number_0, GPIO_PullUp_Disable);
    GPIO_setPullUp(myGpio, GPIO_Number_1, GPIO_PullUp_Disable);
    GPIO_setMode(myGpio, GPIO_Number_0, GPIO_0_Mode_EPWM1A);
    GPIO_setMode(myGpio, GPIO_Number_1, GPIO_1_Mode_EPWM1B);
    PWM_setSyncMode(myPwm1, PWM_SyncMode_EPWMxSYNC)
    PWM_enableCounterLoad(myPwm1);

    // Set the phase
   /* PWM_setPhase(myPwm1, 100);
    PWM_setPhase(myPwm1, 200);
    PWM_setPhase(myPwm1, 300);*/

    PWM_setPeriod(myPwm1, PWM1_TIMER_TBPRD);
    PWM_setCounterMode(myPwm1, PWM_CounterMode_Up);         // Count up
    PWM_setIntMode(myPwm1, PWM_IntMode_CounterEqualZero);   // Select INT on Zero event
    PWM_enableInt(myPwm1);                                  // Enable INT
    PWM_setIntPeriod(myPwm1, PWM_IntPeriod_FirstEvent);     // Generate INT on 1st event

    PWM_setActionQual_Period_PwmA(myPwm1, PWM_ActionQual_Set);
    PWM_setActionQual_CntUp_CmpA_PwmA(myPwm1, PWM_ActionQual_Clear);

    PWM_setActionQual_Period_PwmB(myPwm1, PWM_ActionQual_Set);
    PWM_setActionQual_CntUp_CmpA_PwmB(myPwm1, PWM_ActionQual_Clear);

   CLK_enableTbClockSync(myClk);
 // EPwm3Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;
   //EPwm3Regs.DBRED = 50;
  // EPwm3Regs.DBFED = 100;
}

void InitEPwm3()
{

    CLK_disableTbClockSync(myClk);
    CLK_enablePwmClock(myClk, PWM_Number_3);
    GPIO_setPullUp(myGpio, GPIO_Number_4, GPIO_PullUp_Disable);
    GPIO_setPullUp(myGpio, GPIO_Number_5, GPIO_PullUp_Disable);
    GPIO_setMode(myGpio, GPIO_Number_4, GPIO_4_Mode_EPWM3A);
    GPIO_setMode(myGpio, GPIO_Number_5, GPIO_5_Mode_EPWM3B);
     // Setup Sync
    PWM_setSyncMode(myPwm3, PWM_SyncMode_EPWMxSYNC);
  //  PWM_setSyncMode(myPwm2, PWM_SyncMode_EPWMxSYNC);
    PWM_enableCounterLoad(myPwm3);
   

    PWM_setPeriod(myPwm3, PWM3_TIMER_TBPRD);
    PWM_setCounterMode(myPwm3, PWM_CounterMode_Up);         
    PWM_setIntMode(myPwm3, PWM_IntMode_CounterEqualZero);   
    PWM_enableInt(myPwm3);                                  
    PWM_setIntPeriod(myPwm3, PWM_IntPeriod_FirstEvent);   

   PWM_setActionQual_Period_PwmA(myPwm3, PWM_ActionQual_Set);
   PWM_setActionQual_CntUp_CmpA_PwmA(myPwm3, PWM_ActionQual_Clear);

    PWM_setActionQual_Period_PwmB(myPwm3, PWM_ActionQual_Set);
    PWM_setActionQual_CntUp_CmpA_PwmB(myPwm3, PWM_ActionQual_Clear);
    CLK_enableTbClockSync(myClk);

}

Madhuri Depuru said:

I guess I have already incorporated that part in my program

Nope you've not incorporated what I suggested!

CLK_disableTbClockSync(myClk);

InitEPwm1();
InitEPwm2();
InitEPwm3();

CLK_enableTbClockSync(myClk);

Please enable and disable clock sync every-time as you're doing above.

Regards,

Guatam

I did it. still the same response

the result is as follows