CC3220SF: Waking up from LPDS mode triggered by GPIO

Hi Jesu,

   Thanks a lot for your quick response.

   I tried to follow the style of AWS demo project. Press SW2 of LaunchPad board result in a crash instead of expected LED toggle. Is there any mistake I made ?

   Secondly because GPIO13 is also defined in gpioPinConfigs[], should I modify the code in gpioPinConfigs[] for enabling LPDS wakeup ?

Here is my code based on original AWS demo project :

1.  replace the Demo function with a LED blinking loop :

// DEMO_RUNNER_RunDemos();

Power_enablePolicy();
PRCMLPDSWakeupSourceEnable(PRCM_LPDS_GPIO);

while(true)

{
GPIO_toggle(GPIOCC32XX_GPIO_10);
vTaskDelay(pdMS_TO_TICKS( 1000 ));
}

2. Modify PowerCC32XX_config :

const PowerCC32XX_ConfigV1 PowerCC32XX_config = {
.policyInitFxn = &PowerCC32XX_initPolicy,
.policyFxn = &PowerCC32XX_sleepPolicy,
.enterLPDSHookFxn = NULL,
.resumeLPDSHookFxn = NULL,
.enablePolicy = false,
.enableGPIOWakeupLPDS = true,
.enableGPIOWakeupShutdown = true,
.enableNetworkWakeupLPDS = true,
.wakeupGPIOSourceLPDS = PRCM_LPDS_GPIO13,
.wakeupGPIOTypeLPDS = PRCM_LPDS_FALL_EDGE,
.wakeupGPIOFxnLPDS = gpioButtonFxn0,
.wakeupGPIOFxnLPDSArg = 0,
.wakeupGPIOSourceShutdown = PRCM_HIB_GPIO13,
.wakeupGPIOTypeShutdown = PRCM_HIB_RISE_EDGE,
.ramRetentionMaskLPDS = PRCM_SRAM_COL_1 | PRCM_SRAM_COL_2 |
PRCM_SRAM_COL_3 | PRCM_SRAM_COL_4,
.keepDebugActiveDuringLPDS = false,
.ioRetentionShutdown = PRCM_IO_RET_GRP_1,
.pinParkDefs = parkInfo,
.numPins = sizeof(parkInfo) / sizeof(PowerCC32XX_ParkInfo)
};

3. Call back function :

void myButtonFxn0()
{
/* Clear the GPIO interrupt and toggle an LED */
GPIO_toggle(GPIOCC32XX_GPIO_09);

}

Hi Martin,

Is the MCU ever going to sleep? The while loop code above shows a delay. Keep in mind your callback function is triggered after wakeup and when you enter sleep mode your LEDs will turn off if they're being driven by GPIOs on the device.

Jesu