tms320f28069 ePWM configuration

I am using the TMS320f28069 for my application. I am trying the use ePWM5  only to trig the ADC converter and the converter trig the CLA1 task5.

the ePWM is configured as IO line , is it possible to use this module internally even if the output is configured as IO line?

if that is possible do you have any idea where is the problem (see the following code : simplified  for clarity )

Thank you in advance.

  //  GPIO-08 - PIN FUNCTION                      // GPIO GpioCtrlRegs.GPAMUX1.bit.GPIO8 = 0;    // 0=GPIO,  1=EPWM5A,  2=Resv,  3=ADCSOC-A

GpioCtrlRegs.GPADIR.bit.GPIO8 = 0;            // 1=OUTput,  0=Input

 SysCtrlRegs.PCLKCR1.bit.EPWM5ENCLK = 1; // enable the clock for ePWM5

        // Configure ADC to be triggered from EPWM5 Period event

       //Map channel to ADC Pin

       ChSel[0]=0;                      //Map channel 0 to pin ADC-A0 

        TrigSel[0]= ADCTRIG_EPWM5_SOCA;

        // Configure the ADC with auto interrupt clear mode

       // ADC interrupt after EOC of channel 0

       ADC_SOC_CNF(ChSel,TrigSel,ACQPS,0,2);

       // Configure the EPWM5 to issue the SOC

       EPwm5Regs.ETSEL.bit.SOCAEN       = 1;                // enable SOCA

       EPwm5Regs.ETSEL.bit.SOCASEL = ET_CTRU_CMPB;   // Use CMPB event as trigger for ADC SOC

                                                                              // trigger in the middle of the ON duty cycle

    EPwm5Regs.ETPS.bit.SOCAPRD   = ET_1ST;        // Generate pulse on every event

         //Configure hardware peripherals used by the CLA task5.

       // Configure PWM5 for 100Khz switching Frequency

      PWM_HSFB_Cnf(5,900);

        CLA_Init();

 // ADCINT5 will start CLA Task 5

    EALLOW;

  Cla1Regs.MPISRCSEL1.bit.PERINT5SEL = CLA_INT5_ADCINT5 ;  

                                 // 0=ADCINT5    1=none    2=EPWM5INT

       // Configure the interrupt that would occur each control cycles

     Cla1Regs.MIER.all = M_INT5;  // task 5  

       EDIS;

interrupt void Cla1Task5(void) {

// read the  analog input

  /*

TO be done

*/

              EPwm5Regs.ETCLR.all = 1;

}