Posted on March 14, 2017 at 07:19MCU: STM32L443VCT
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I am calling 'HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);' from the main application of my code but it seems that the function returns immediately (MCU not entering STOP2 mode). What I might be doing wrong, or where should I look for issues? Am I missing something. Do I need to do any sort of configuration so that the MCU enters STOP2 mode?
I know that I have not configured any wakeup event, but initially I am just trying to make sure that the MCU enters the STOP2 mode
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My program flows as follows: (SystemClock_Config is the only function called before calling HAL_PWREx_EnterSTOP2Mode)
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void
SystemClock_Config(
void)
{
RCC_OscInitTypeDef
RCC_OscInitStruct;
RCC_ClkInitTypeDef
RCC_ClkInitStruct;
RCC_PeriphCLKInitTypeDef
PeriphClkInit;
RCC_OscInitStruct.
OscillatorType
= RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.
MSIState
= RCC_MSI_ON;
RCC_OscInitStruct.
MSICalibrationValue
= 0;
RCC_OscInitStruct.
MSIClockRange
= RCC_MSIRANGE_6;
RCC_OscInitStruct.
PLL
.
PLLState
= RCC_PLL_ON;
RCC_OscInitStruct.
PLL
.
PLLSource
= RCC_PLLSOURCE_MSI;
RCC_OscInitStruct.
PLL
.
PLLM
= 1;
RCC_OscInitStruct.
PLL
.
PLLN
= 40;
RCC_OscInitStruct.
PLL
.
PLLP
= RCC_PLLP_DIV7;
RCC_OscInitStruct.
PLL
.
PLLQ
= RCC_PLLQ_DIV2;
RCC_OscInitStruct.
PLL
.
PLLR
= RCC_PLLR_DIV2;
if
(HAL_RCC_OscConfig(&RCC_OscInitStruct) !=
HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.
ClockType
= RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.
SYSCLKSource
= RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.
AHBCLKDivider
= RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.
APB1CLKDivider
= RCC_HCLK_DIV1;
RCC_ClkInitStruct.
APB2CLKDivider
= RCC_HCLK_DIV1;
if
(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) !=
HAL_OK)
{
Error_Handler();
}
PeriphClkInit.
PeriphClockSelection
= RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_USART2
|RCC_PERIPHCLK_USART3|RCC_PERIPHCLK_LPUART1
|RCC_PERIPHCLK_I2C1|RCC_PERIPHCLK_SDMMC1
|RCC_PERIPHCLK_RNG|RCC_PERIPHCLK_ADC;
PeriphClkInit.
Usart1ClockSelection
= RCC_USART1CLKSOURCE_PCLK2;
PeriphClkInit.
Usart2ClockSelection
= RCC_USART2CLKSOURCE_PCLK1;
PeriphClkInit.
Usart3ClockSelection
= RCC_USART3CLKSOURCE_PCLK1;
/*
* WARNING: Lpuart1ClockSelection have been changed from
* RCC_LPUART1CLKSOURCE_PCLK1 to RCC_LPUART1CLKSOURCE_HSI.
* This will result into feeding 16 MHz clock into LP UART
* instead of 80 MHz clock. Hence, effective clock frequency
* will be 5 (80 / 16) times slower than original frequency.
*/
PeriphClkInit.
Lpuart1ClockSelection
= RCC_LPUART1CLKSOURCE_PCLK1;
//RCC_LPUART1CLKSOURCE_HSI;//RCC_LPUART1CLKSOURCE_PCLK1;
PeriphClkInit.
I2c1ClockSelection
= RCC_I2C1CLKSOURCE_PCLK1;
PeriphClkInit.
AdcClockSelection
= RCC_ADCCLKSOURCE_PLLSAI1;
PeriphClkInit.
RngClockSelection
= RCC_RNGCLKSOURCE_PLLSAI1;
PeriphClkInit.
Sdmmc1ClockSelection
= RCC_SDMMC1CLKSOURCE_PLLSAI1;
PeriphClkInit.
PLLSAI1
.
PLLSAI1Source
= RCC_PLLSOURCE_MSI;
PeriphClkInit.
PLLSAI1
.
PLLSAI1M
= 1;
PeriphClkInit.
PLLSAI1
.
PLLSAI1N
= 16;
PeriphClkInit.
PLLSAI1
.
PLLSAI1P
= RCC_PLLP_DIV7;
PeriphClkInit.
PLLSAI1
.
PLLSAI1Q
= RCC_PLLQ_DIV2;
PeriphClkInit.
PLLSAI1
.
PLLSAI1R
= RCC_PLLR_DIV2;
PeriphClkInit.
PLLSAI1
.
PLLSAI1ClockOut
= RCC_PLLSAI1_48M2CLK|RCC_PLLSAI1_ADC1CLK;
if
(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) !=
HAL_OK)
{
Error_Handler();
}
__HAL_RCC_PWR_CLK_ENABLE();
if
(HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) !=
HAL_OK)
{
Error_Handler();
}
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
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#sleep-wakeup #stop2 #stm32
