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EPWM and ADC interrupt error

ha kilho
Prodigy 250 points


Hello.

I control EPWM and ADC interrupt. pair channel one and pair channel 2,3,4 are independent.

after finishing channel one pulse . channel 2,3,4 turn on.

and channel 4 falling edge is connected with interrupt. in that interrupt ADC conversion will start

so register should be changed to control EPWM. 

at the first time when debugging the code, channel 4 interrupt perfectly work. after that I change the EPWM register 

second time when turn on the channel 2,3,4 again, EPWM4 channel interrupt is ignored by something.

help me. ;(

  • 0
    Guru 192875 points

    Hi,

    In short you mean to say that EOC of channel 4 triggers SOC of channel 1. Are you using sequential technique or any other? Also, which controller are you using?

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    TI__Guru 60865 points

    Hi ha kilho,

    If the interrupt works correctly the first time but not the second time, then the most likely issue is that one of the flags was not acknowledged.  Please check that all of the following are occurring in the ISR:

    The ADC interrupt flag is cleared 

    The Pie interrupt flag is cleared

    The CPU interrupt flag is cleared