Problem with SHUTDOWN mode
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‎2020-04-20 05:54 AM
Hello,
I have a board with stm32wb55. I can't enter to shutdown mode or can't to exit form shutdown.
I want to exit from this mode via wakeup pin 1 PA0. I use this code
if( (LL_PWR_IsActiveFlag_C1SB() == 0)
|| (LL_PWR_IsActiveFlag_C2SB() == 0)
)
{
/* Set the lowest low-power mode for CPU2: shutdown mode */
LL_C2_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN);
}
HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_A, PWR_GPIO_BIT_0);
HAL_PWREx_EnablePullUpPullDownConfig();
/* Disable used wakeup source: PWR_WAKEUP_PIN1 */
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN2);
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN3);
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN4);
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN5);
/* Clear all related wakeup flags */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF1);
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_LOW);
HAL_PWREx_DisableInternalWakeUpLine();
/* enter shutdown */
HAL_PWREx_EnterSHUTDOWNMode();
MCU enter to something mode (maybe it's shutdown) but I cant exit from it. Why? I don't understand. Before the entering I use this pin PA0 as input GPIO with pullup.
- Labels:
-
Power
-
STM32WB series
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‎2020-04-22 07:29 AM
Hello,
You can try this sequence :
if( (LL_PWR_IsActiveFlag_C1SB() == 0)
|| (LL_PWR_IsActiveFlag_C2SB() == 0)
)
{
/* Set the lowest low-power mode for CPU2: shutdown mode */
LL_C2_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN);
}
HAL_PWREx_ClearWakeupFlag(PWR_FLAG_WUF1);
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_HIGH);
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
/* USER CODE BEGIN 2 */
HAL_SuspendTick();
HAL_PWREx_EnterSHUTDOWNMode();
Best Regards,
Mohamed Aymen.
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‎2020-04-23 06:21 AM
So, thanks. This code is working. But I haven't many problem with it :(
1) I have a button on this pin (PA0 - WakeUp1 pin). When button is pressed pin PA0 is connected to GND. But when button is not pressed pin PA0 in the Z-state. I haven't external pullup resistor on this pin and use internal pullup. This is my new code
if( (LL_PWR_IsActiveFlag_C1SB() == 0)
|| (LL_PWR_IsActiveFlag_C2SB() == 0))
{
/* Set the lowest low-power mode for CPU2: shutdown mode */
LL_C2_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN);
}
HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_A, PWR_GPIO_BIT_0);
HAL_PWREx_EnablePullUpPullDownConfig();
HAL_PWREx_ClearWakeupFlag(PWR_FLAG_WUF1);
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_HIGH);
HAL_SuspendTick();
HAL_PWREx_EnterSHUTDOWNMode();
But when I enter to shutdown mode - CPU immediately exits it with PWR_FLAG_WUF1. Why? Can you help me with them)
2) Always after debug is starting (i use the Keil 5.29, compiler v5.06 build 750, st-link v2 mini) after function APPE_Init() hardware semaphore HSEM2 (CFG_HW_FLASH_SEMID) always bysu and Flag CFGBSY in FLASH_SR too.
I can erase or write to flash nothing!!! CPU2 don,t release this semaphore. At the same time I can't find my BLE device via my phone and at the same time i can't enter to shutdown mode. But if i press "reset CPU" in the Keil everything is getting good. Where is finding the problem? I use full_BLE_stack v1.5 and stm32WB55CGU
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‎2020-04-24 03:16 AM
I also noticed that when I turn on the Debug at first registers PWR-C2CR1 = 0, PWR->C2CR2 = 0, PWR->EXTSCR = 0x00000F00. In this moment Hsem2 is busy CPU2 and I can't find my Bluetooth device.
But after reset PWR-C2CR1 = 4, PWR->C2CR2 = 0x00000200, PWR->EXTSCR = 0x00008F00
I think the CPU2 is freezing. Why?