Posted on April 12, 2016 at 08:56We're using the STM32CubeExpansion_BLE1_V2.5.2 on a STM32L4-Nucleo + BlueNRG-Expansion. It comes with low power manager drivers. The STM32L4 switches between RUN and STOP mode every ~ 1 sec. It uses RTC wakeup timer interrupt to exit STOP state. We can't locate the entry point to toggle GPIO after return from STOP mode.
The following LPM_Enter_Mode() function seems to point to the LPM_ExitStopMode() as the logical place to do the GPIO toggle but the code never gets there:
void LPM_Enter_Mode(void)
{
uint32_t uwPRIMASK_Bit;
uwPRIMASK_Bit = __get_PRIMASK(); /**< backup PRIMASK bit */
__disable_irq(); /**< Disable all interrupts by setting PRIMASK bit on Cortex*/
if(uwRUN_Req == 0)
{
if(uwDeepSleep_Req)
{
/**
* Enter Sleep Mode
*/
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
}
else if (uwPDDS_Req == 0) /* WARNING: This mode is not supported yet by any platform */
{
LPM_EnterStandbyMode(); /**< Call user Hook */
/**
* Clear Wakeup flag
*/
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
/**
* Enter Standby Mode
*/
HAL_PWR_EnterSTANDBYMode();
LPM_ExitStandbyMode(); /**< Call user Hook */
}
else
{
/**
* Clear Wakeup flag
*/
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
/**
* Enter Stop Mode
*/
if(uwLPSDSR_Req)
{
HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFI);
}
else
{
&sharpifdef USE_STM32L4XX_NUCLEO
HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
&sharpelse
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
&sharpendif
}
LPM_ExitStopMode(); /**< Call user Hook */
}
}
__set_PRIMASK(uwPRIMASK_Bit); /**< Restore PRIMASK bit*/
return;
}
#stm32l4-low-power-mode-stop
