LAUNCHXL-F28379D: AET resources and debug mode

edit: "existing AET resources" 

Hi Vincent,

Please allow me a day to try to replicate your issue. 

Best Regards,

Ben Collier

Hello Benjamin. Glad to speak to you again.

This problem is very serious for me. I reproduced this. Let me explain to you extacly what I done (maybe oit will help you:

1- I started from a project without any PWM or ADC

2- I used SysConfig to configure a PWM, which generates an interrupt each COMPA overflow --> OK

3- I tried to add an ADC handler with SysConfig. There was a lack oh RAM. Instead of add RAM blocks for the text section, I switched the active configuration to FLASH --> OK

4- I asked to SysConfig to Enable SOCA Trigger, and to trig the SOC on SOCA PWM1. There was a lack of Flash Memory for cinit section, so I added a FLASH block for cinit

I don't think it is a good idea because the cinit section is not splitted. I don't know why, but it worked (in release mode butr also in debug mode). I still entered in the PWM interrupt; but not in the ADC Interrupt

5- I juste tried to insert the EPWM_clearADCTriggerFlag driverlib function in my code. --> here comes the AET message in the debug mode

6- I tried to come back to the previous configuration. This is impossible. the debug mode is no more available, and the programm do not work

Vincent,

I imported the project that you attached, and I was entering the EPWM interrupt, but never the ADC interrupt, like you mentioned. I went to our adc_ex2_soc_epwm example, and I copied the initialization code for the EPWM module, and pasted it into your empty_bitfield_driverlib_main.c file. 

void initEPWM(void)
{
    //
    // Disable SOCA
    //
    EPWM_disableADCTrigger(EPWM2_BASE, EPWM_SOC_A);

    //
    // Configure the SOC to occur on the first up-count event
    //
    EPWM_setADCTriggerSource(EPWM2_BASE, EPWM_SOC_A, EPWM_SOC_TBCTR_U_CMPA);
    EPWM_setADCTriggerEventPrescale(EPWM2_BASE, EPWM_SOC_A, 1);

    //
    // Set the compare A value to 1000 and the period to 1999
    // Assuming ePWM clock is 100MHz, this would give 50kHz sampling
    // 50MHz ePWM clock would give 25kHz sampling, etc.
    // The sample rate can also be modulated by changing the ePWM period
    // directly (ensure that the compare A value is less than the period).
    //
    EPWM_setCounterCompareValue(EPWM2_BASE, EPWM_COUNTER_COMPARE_A, 1000);
    EPWM_setTimeBasePeriod(EPWM2_BASE, 1999);

    //
    // Set the local ePWM module clock divider to /1
    //
    EPWM_setClockPrescaler(EPWM2_BASE,
                           EPWM_CLOCK_DIVIDER_1,
                           EPWM_HSCLOCK_DIVIDER_1);

    //
    // Freeze the counter
    //
    EPWM_setTimeBaseCounterMode(EPWM2_BASE, EPWM_COUNTER_MODE_STOP_FREEZE);
}

I called this function after board_init(), so it overwrites the settings from SysConfig. 

I then enabled the EPWM for counter mode up and enabled it to trigger the ADC right before the main while loop: 

    EPWM_enableADCTrigger(EPWM2_BASE, EPWM_SOC_A);
    EPWM_setTimeBaseCounterMode(EPWM2_BASE, EPWM_COUNTER_MODE_UP);

With these changes to how EPWM2 is configured, I was able to enter both the EPWM and ADC interrupts.

I hope this helps.

Best Regards,

Ben Collier