CC3200-LAUNCHXL: SW3 is not responding when we press it.

Hi Omar,

Did you ensure to ungate the clock to the GPIO_A1 peripheral before calling those three GPIO functions to set the buzzer PWM pin to GPIO? You should have a MAP_PRCMPeripheralClkEnable(PRCM_GPIOA1, PRCM_RUN_MODE_CLK); call at some point to enable the GPIO A1 peripheral.

Regards,

Michael

Hi Michael,

Yes of course I am calling MAP_PRCMPeripheralClkEnable(PRCM_GPIOA1, PRCM_RUN_MODE_CLK) in PinMuxConfig() before executing the tasks, and the button SW3 is working just fine (until I call the Buzzer disable module and execute those three GPIO functions).

Here are the functions I used to control the buzzer:

void vBuzzer_InitModule(void)
{
    /*PWM Output signal for PIN_64, using a Timer*/
    MAP_PinTypeTimer(ucPin_BUZZER, PIN_MODE_3);

    // Initialization of timers to generate PWM output
    MAP_PRCMPeripheralClkEnable(BUZZER_TIMER_PRCM, PRCM_RUN_MODE_CLK);

    // Set GPT - Configured Timer in PWM mode.
    MAP_TimerConfigure(BUZZER_TIMER_BASE, BUZZER_TIMER_COUNTING_MODE);
    MAP_TimerPrescaleSet(BUZZER_TIMER_BASE, BUZZER_TIMER,0);

    // Inverting the timer output if required
    MAP_TimerControlLevel(BUZZER_TIMER_BASE, BUZZER_TIMER, 0);
}

void vBuzzer_SetFrequency(uint32_t u32Frequency)
{
	MAP_TimerDisable(BUZZER_TIMER_BASE, BUZZER_TIMER);/*In case we apdate the frequency*/

	MAP_TimerLoadSet (BUZZER_TIMER_BASE, BUZZER_TIMER, TIMER_INTERVAL_RELOAD(u32Frequency));
	MAP_TimerMatchSet(BUZZER_TIMER_BASE, BUZZER_TIMER, TIMER_INTERVAL_RELOAD(u32Frequency/2));

	MAP_TimerEnable(BUZZER_TIMER_BASE, BUZZER_TIMER);
}

void vBuzzer_DisabletModule(void)
{
    // Disable the peripherals
    MAP_TimerDisable(BUZZER_TIMER_BASE, BUZZER_TIMER);

    MAP_PRCMPeripheralClkDisable(BUZZER_TIMER_PRCM, PRCM_RUN_MODE_CLK);

    /*Re-config Buzzzer pin as normal low output to avoid PWM wrong last state*/
    MAP_PinTypeGPIO(ucPin_BUZZER, PIN_MODE_0, false);
    MAP_GPIODirModeSet(gpioPort_BUZZER, ucPin_BUZZER, GPIO_DIR_MODE_OUT);
    MAP_GPIOPinWrite(gpioPort_BUZZER, ucPin_BUZZER, ~ucPin_BUZZER);
}


void vBuzzer_PlayToneHBTMOK(void)
{
	vBuzzer_InitModule();

	vBuzzer_SetFrequency(BUZZER_FREQUENCY1_HZ);
	vTaskDelay(100);

	vBuzzer_SetFrequency(BUZZER_FREQUENCY2_HZ);
	vTaskDelay(200);

	vBuzzer_DisabletModule();
}

I also added  MAP_PRCMPeripheralClkEnable(PRCM_GPIOA1, PRCM_RUN_MODE_CLK); after disabling the module but same result.

Best Regards.
Omar.

Hi Omar,

As long as you're calling MAP_PRCMPeripheralClkEnable(PRCM_GPIOA1, PRCM_RUN_MODE_CLK); at some point then you should be good.

At this point, it looks like I will need to work on replicating your setup to see this bug in action for myself and then note down what fixes might need to be made. For the replication effort, are the these the steps that you have?

1. Enable SW3 as input with callback
2. Enable pin 64 as PWM
3. Disable pin 64 as PWM
4. Reconfigure pin 64 as GPIO input

Please let me know if there are other reproduction steps needed.

Regards,

Michael

Hi Michael,

Yes, indeed, just to be sure, for the 4^th step is Reconfigure pin 64 as GPIO output and not as GPIO input.

Best Regards,
Omar.

Hi Omar,

Thanks for the catch and pointing out that the pin should be reconfigured into a GPIO output. I will work on reproducing this, and will give you an update when I do so, hopefully over the next few days.

Regards,

Michael

Hi Michael,

is there any news, it has been two weeks since the last discussion ??

Best Regards,
Omar.