Hello to all. I am new to the STM32WL series and have been trying to implement the STOP2 mode and STANDBY mode (both with RTC enabled) for STM32WLE5JC, but have not been able to achieve the low current consumption that is expected of it. The datasheet shows current consumption of 1uA and 0.4uA respectively for STOP2 and STANDBY Modes respectively (with RTC enabled; VDD= 3V) , but mine has only been able to come down to 450uA for both modes, which is not even close to the datasheet.
I have implemented STOP2 from the code provided in the following link:
https://github.com/androbi-com/STM32WLE5JC-Blinky-StopMode
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_RTC_Init();
MX_GPIO_Init();
/* USER CODE BEGIN 2 */
// prevent firing too early
HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
// 4 "blinks"
for (int i=0; i< 8; i++)
{
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
HAL_Delay(200);
}
// prepare wakeup timer, 10secs
if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0x4E20, RTC_WAKEUPCLOCK_RTCCLK_DIV16, 0) != HAL_OK)
{
Error_Handler();
}
// stop ticks and fall asleep
HAL_SuspendTick();
HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
// (ー。ー) zzz (ー。ー) zzz (ー。ー) zzz
// restore clock and ticks
SystemClock_Config();
HAL_ResumeTick();
// deactivate RTC wake up
HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure LSE Drive Capability
*/
HAL_PWR_EnableBkUpAccess();
__HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE|RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief RTC Initialization Function
* @PAram None
* @retval None
*/
static void MX_RTC_Init(void)
{
/* USER CODE BEGIN RTC_Init 0 */
/* USER CODE END RTC_Init 0 */
/* USER CODE BEGIN RTC_Init 1 */
/* USER CODE END RTC_Init 1 */
/** Initialize RTC Only
*/
hrtc.Instance = RTC;
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
hrtc.Init.AsynchPrediv = 127;
hrtc.Init.SynchPrediv = 255;
hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
hrtc.Init.OutPutPullUp = RTC_OUTPUT_PULLUP_NONE;
hrtc.Init.BinMode = RTC_BINARY_NONE;
if (HAL_RTC_Init(&hrtc) != HAL_OK)
{
Error_Handler();
}
/** Enable the WakeUp
*/
if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0, RTC_WAKEUPCLOCK_RTCCLK_DIV16, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN RTC_Init 2 */
/* USER CODE END RTC_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @PAram None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET);
/*Configure GPIO pins : PA14 PA12 PA15 PA13
PA11 PA10 PA0 PA9
PA6 PA1 PA3 PA2
PA7 PA4 PA5 PA8 */
GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_12|GPIO_PIN_15|GPIO_PIN_13
|GPIO_PIN_11|GPIO_PIN_10|GPIO_PIN_0|GPIO_PIN_9
|GPIO_PIN_6|GPIO_PIN_1|GPIO_PIN_3|GPIO_PIN_2
|GPIO_PIN_7|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pins : PB15 PB3 PB4 PB7
PB9 PB14 PB8 PB13
PB2 PB6 PB12 PB1
PB0 PB11 PB10 */
GPIO_InitStruct.Pin = GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_7
|GPIO_PIN_9|GPIO_PIN_14|GPIO_PIN_8|GPIO_PIN_13
|GPIO_PIN_2|GPIO_PIN_6|GPIO_PIN_12|GPIO_PIN_1
|GPIO_PIN_0|GPIO_PIN_11|GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pins : PC13 PC2 PC3 PC5
PC1 PC0 PC4 PC6 */
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_5
|GPIO_PIN_1|GPIO_PIN_0|GPIO_PIN_4|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pin : PB5 */
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
I am measuring the current consumption by using the Power Profiler Kit by Nordic. I have simply connected the Vout and Gnd of the Kit to 3.3V and Gnd of the board respectively. The current consumption in source meter mode is shown below.
I have also tried making changes into the code such as re-initialising the LED pin to Analog and disabling the clocks before entering STOP2 Mode, but have seen no changes in the current consumed.
