Greetings,
I have acquired Nucleo-U031R8 as I was searching for ULP controllers and specification of this one was good. I am currently trying to lower current consumption as low as possible.
Previously, I have used Nucleo-L073RZ where I was able to achieve approx. 300uA in low power run mode and 150uA in sleep mode. I was hoping to get much lower current consumption using U0 series processor but it seems like it is consuming more power then L0 series.
Note that in both controller program and other peripheral configurations are same. Can someone please suggest why it is happing and what can I do about it?
Thank you so much for the help. @KDJEM.1 @LPetr.1 @TDK
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2025 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "u8g2.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;
I2C_HandleTypeDef hi2c1;
RTC_HandleTypeDef hrtc;
SPI_HandleTypeDef hspi1;
/* USER CODE BEGIN PV */
u8g2_t myDisplay;
uint8_t counter;
uint16_t ADC_VAL[2];
uint16_t ADC_SUM[2];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
static void MX_RTC_Init(void);
static void MX_SPI1_Init(void);
static void MX_ADC1_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t u8x8_gpio_and_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
switch(msg)
{
case U8X8_MSG_DELAY_MILLI:
HAL_Delay(arg_int);
break;
case U8X8_MSG_GPIO_CS:
//HAL_GPIO_WritePin(LCD_CS_GPIO_Port, LCD_CS_Pin, arg_int);
break;
case U8X8_MSG_GPIO_DC:
HAL_GPIO_WritePin(LCD_A0_GPIO_Port, LCD_A0_Pin, arg_int);
break;
case U8X8_MSG_GPIO_RESET:
HAL_GPIO_WritePin(LCD_RES_GPIO_Port, LCD_RES_Pin, arg_int);
break;
}
return 1;
}
//Normal SPI
uint8_t u8x8_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
switch(msg)
{
case U8X8_MSG_BYTE_SET_DC:
HAL_GPIO_WritePin(LCD_A0_GPIO_Port, LCD_A0_Pin, arg_int);
break;
case U8X8_MSG_BYTE_SEND:
HAL_SPI_Transmit(&hspi1, (uint8_t *)arg_ptr, arg_int, 1000);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
// HAL_GPIO_WritePin(LCD_CS_GPIO_Port, LCD_CS_Pin, GPIO_PIN_RESET);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
//HAL_GPIO_WritePin(LCD_CS_GPIO_Port, LCD_CS_Pin, GPIO_PIN_SET);
break;
}
return 1;
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
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_GPIO_Init();
MX_I2C1_Init();
MX_RTC_Init();
MX_SPI1_Init();
MX_ADC1_Init();
/* USER CODE BEGIN 2 */
HAL_PWREx_EnableUltraLowPowerMode();
__HAL_RCC_GPIOD_CLK_DISABLE();
__HAL_RCC_GPIOF_CLK_DISABLE();
__HAL_RCC_DAC1_CLK_DISABLE();
__HAL_RCC_DMA1_CLK_DISABLE();
__HAL_RCC_I2C2_CLK_DISABLE();
__HAL_RCC_I2C3_CLK_DISABLE();
__HAL_RCC_LPTIM1_CLK_DISABLE();
__HAL_RCC_LPTIM2_CLK_DISABLE();
__HAL_RCC_TIM1_CLK_DISABLE();
__HAL_RCC_TIM2_CLK_DISABLE();
__HAL_RCC_TIM3_CLK_DISABLE();
__HAL_RCC_TIM6_CLK_DISABLE();
__HAL_RCC_TIM7_CLK_DISABLE();
__HAL_RCC_TIM15_CLK_DISABLE();
__HAL_RCC_TIM16_CLK_DISABLE();
__HAL_RCC_OPAMP_CLK_DISABLE();
__HAL_RCC_LPUART1_CLK_DISABLE();
__HAL_RCC_LPUART2_CLK_DISABLE();
__HAL_RCC_USART1_CLK_DISABLE();
__HAL_RCC_USART2_CLK_DISABLE();
__HAL_RCC_USART3_CLK_DISABLE();
__HAL_RCC_USART4_CLK_DISABLE();
HAL_Delay(100);
HAL_GPIO_WritePin(PE_ENABLE_GPIO_Port, PE_ENABLE_Pin, 0);
HAL_Delay(1000);
HAL_GPIO_WritePin(AL1_LED_GPIO_Port, AL1_LED_Pin,1);
HAL_GPIO_WritePin(AL2_LED_GPIO_Port,AL2_LED_Pin,1);
HAL_GPIO_WritePin(VIB_BUZZ_GPIO_Port,VIB_BUZZ_Pin,0);
HAL_GPIO_WritePin(CB_LED_GPIO_Port,CB_LED_Pin,1);
u8g2_Setup_ist7920_128x128_f(&myDisplay, U8G2_R0, u8x8_spi, u8x8_gpio_and_delay);
u8g2_InitDisplay(&myDisplay); // send init sequence to the display, display is in sleep mode after this,
u8g2_SetPowerSave(&myDisplay, 0); // wake up display
u8g2_ClearDisplay(&myDisplay);
u8g2_SetContrast(&myDisplay, 200);
u8g2_DrawXBM(&myDisplay, 0, 0, 128, 128, website_logo_new_colour_1x__1__bitmap);
u8g2_SendBuffer(&myDisplay);
HAL_Delay(5000);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
if(counter>200)
{
counter=0;
}
else
{
counter++;
}
char strr[7];
ADC_SUM[0] = ADC_SUM[1] = 0;
HAL_ADC_Start(&hadc1);
for(uint8_t loop=0; loop<10; loop++)
{
HAL_ADC_PollForConversion(&hadc1, 1000);
ADC_VAL[0] = HAL_ADC_GetValue(&hadc1);
HAL_ADC_PollForConversion(&hadc1, 1000);
HAL_ADC_PollForConversion(&hadc1, 1000);
ADC_VAL[1] = HAL_ADC_GetValue(&hadc1);
ADC_SUM[0] += ADC_VAL[0];
ADC_SUM[1] += ADC_VAL[1];
}
HAL_ADC_Stop(&hadc1);
ADC_SUM[0] = (ADC_SUM[0]/10);
ADC_SUM[1] = (ADC_SUM[1]/10);
sprintf(strr,"%03u",ADC_SUM[0]);
u8g2_SetFont(&myDisplay, u8g2_font_helvB14_tf);
u8g2_DrawStr(&myDisplay, 20,30,strr);
sprintf(strr,"%03u",ADC_SUM[1]);
u8g2_SetFont(&myDisplay, u8g2_font_helvB14_tf);
u8g2_DrawStr(&myDisplay, 60,30,strr);
sprintf(strr,"%03u",counter);
u8g2_SetFont(&myDisplay, u8g2_font_helvB14_tf);
u8g2_DrawStr(&myDisplay, 30,100,strr);
u8g2_SendBuffer(&myDisplay);
HAL_GPIO_WritePin(AL2_LED_GPIO_Port,AL2_LED_Pin,0);
HAL_Delay(100);
HAL_GPIO_WritePin(AL2_LED_GPIO_Port,AL2_LED_Pin,1);
HAL_Delay(900);
uint8_t var1;
HAL_I2C_Slave_Transmit(&hi2c1, &var1, 1, 100);
HAL_I2C_Master_Receive(&hi2c1, var1, &var1, 1, 100);
HAL_SuspendTick();
HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 20000, RTC_WAKEUPCLOCK_RTCCLK_DIV16,0);
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
SystemClock_Config();
HAL_ResumeTick();
/* 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 the main internal regulator output voltage
*/
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_3;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief ADC1 Initialization Function
* @param None
* @retval None
*/
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.LowPowerAutoPowerOff = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;
hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_1CYCLE_5;
hadc1.Init.OversamplingMode = DISABLE;
hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
/**
* @brief I2C1 Initialization Function
* @param None
* @retval None
*/
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
/* USER CODE BEGIN I2C1_Init 1 */
/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x00000102;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */
/* USER CODE END I2C1_Init 2 */
}
/**
* @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, 20000, RTC_WAKEUPCLOCK_RTCCLK_DIV16, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN RTC_Init 2 */
/* USER CODE END RTC_Init 2 */
}
/**
* @brief SPI1 Initialization Function
* @param None
* @retval None
*/
static void MX_SPI1_Init(void)
{
/* USER CODE BEGIN SPI1_Init 0 */
/* USER CODE END SPI1_Init 0 */
/* USER CODE BEGIN SPI1_Init 1 */
/* USER CODE END SPI1_Init 1 */
/* SPI1 parameter configuration*/
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_4BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI1_Init 2 */
/* USER CODE END SPI1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, CB_LED_Pin|VIB_BUZZ_Pin|AL1_LED_Pin|AL2_LED_Pin
|LCD_A0_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LCD_RES_GPIO_Port, LCD_RES_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(PE_ENABLE_GPIO_Port, PE_ENABLE_Pin, GPIO_PIN_RESET);
/*Configure GPIO pins : PC13 PC14 PC15 PC2
PC3 PC4 PC5 PC6
PC8 PC9 PC10 PC11
PC12 */
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_2
|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6
|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11
|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pins : PF0 PF1 PF2 PF3 */
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*Configure GPIO pins : PA0 PA2 PA3 PA4
PA5 PA11 PA12 PA15 */
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4
|GPIO_PIN_5|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pins : PB0 PB1 PB2 PB11
PB12 PB13 PB14 PB15
PB7 PB8 PB9 */
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_11
|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15
|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pins : CB_LED_Pin VIB_BUZZ_Pin AL1_LED_Pin AL2_LED_Pin
LCD_A0_Pin */
GPIO_InitStruct.Pin = CB_LED_Pin|VIB_BUZZ_Pin|AL1_LED_Pin|AL2_LED_Pin
|LCD_A0_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pin : LCD_RES_Pin */
GPIO_InitStruct.Pin = LCD_RES_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LCD_RES_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : PE_ENABLE_Pin */
GPIO_InitStruct.Pin = PE_ENABLE_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(PE_ENABLE_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : PD2 */
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */Clock setup:
For the testing I have cleaned all GPIO and peripheral pins but current consumption is 180uA instead of approx. 110uA as you can see in the datasheet (table 28).
Power settings:
Clock settings:
code:
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2025 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "u8g2.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
u8g2_t myDisplay;
uint8_t counter;
uint16_t ADC_VAL[2];
uint16_t ADC_SUM[2];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/*
uint8_t u8x8_gpio_and_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
switch(msg)
{
case U8X8_MSG_DELAY_MILLI:
HAL_Delay(arg_int);
break;
case U8X8_MSG_GPIO_CS:
//HAL_GPIO_WritePin(LCD_CS_GPIO_Port, LCD_CS_Pin, arg_int);
break;
case U8X8_MSG_GPIO_DC:
HAL_GPIO_WritePin(LCD_A0_GPIO_Port, LCD_A0_Pin, arg_int);
break;
case U8X8_MSG_GPIO_RESET:
HAL_GPIO_WritePin(LCD_RES_GPIO_Port, LCD_RES_Pin, arg_int);
break;
}
return 1;
}
//Normal SPI
uint8_t u8x8_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
switch(msg)
{
case U8X8_MSG_BYTE_SET_DC:
HAL_GPIO_WritePin(LCD_A0_GPIO_Port, LCD_A0_Pin, arg_int);
break;
case U8X8_MSG_BYTE_SEND:
HAL_SPI_Transmit(&hspi1, (uint8_t *)arg_ptr, arg_int, 1000);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
// HAL_GPIO_WritePin(LCD_CS_GPIO_Port, LCD_CS_Pin, GPIO_PIN_RESET);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
//HAL_GPIO_WritePin(LCD_CS_GPIO_Port, LCD_CS_Pin, GPIO_PIN_SET);
break;
}
return 1;
}
*/
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
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_GPIO_Init();
/* USER CODE BEGIN 2 */
__HAL_RCC_GPIOD_CLK_DISABLE();
__HAL_RCC_GPIOF_CLK_DISABLE();
__HAL_RCC_DAC1_CLK_DISABLE();
__HAL_RCC_DMA1_CLK_DISABLE();
__HAL_RCC_I2C2_CLK_DISABLE();
__HAL_RCC_I2C3_CLK_DISABLE();
__HAL_RCC_LPTIM1_CLK_DISABLE();
__HAL_RCC_LPTIM2_CLK_DISABLE();
__HAL_RCC_TIM1_CLK_DISABLE();
__HAL_RCC_TIM2_CLK_DISABLE();
__HAL_RCC_TIM3_CLK_DISABLE();
__HAL_RCC_TIM6_CLK_DISABLE();
__HAL_RCC_TIM7_CLK_DISABLE();
__HAL_RCC_TIM15_CLK_DISABLE();
__HAL_RCC_TIM16_CLK_DISABLE();
__HAL_RCC_OPAMP_CLK_DISABLE();
__HAL_RCC_LPUART1_CLK_DISABLE();
__HAL_RCC_LPUART2_CLK_DISABLE();
__HAL_RCC_USART1_CLK_DISABLE();
__HAL_RCC_USART2_CLK_DISABLE();
__HAL_RCC_USART3_CLK_DISABLE();
__HAL_RCC_USART4_CLK_DISABLE();
__HAL_RCC_COMP_CLK_DISABLE();
HAL_PWREx_EnableUltraLowPowerMode();
HAL_DBGMCU_DisableDBGStopMode();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* 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 the main internal regulator output voltage
*/
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_3;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief GPIO Initialization Function
* None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
/*Configure GPIO pins : PC13 PC14 PC15 PC0
PC1 PC2 PC3 PC4
PC5 PC6 PC7 PC8
PC9 PC10 PC11 PC12 */
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0
|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4
|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8
|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pins : PF0 PF1 PF2 PF3 */
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*Configure GPIO pins : PA0 PA1 PA2 PA3
PA4 PA5 PA6 PA7
PA8 PA9 PA10 PA11
PA12 PA15 */
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3
|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7
|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11
|GPIO_PIN_12|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pins : PB0 PB1 PB2 PB10
PB11 PB12 PB13 PB14
PB15 PB3 PB4 PB5
PB6 PB7 PB8 PB9 */
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10
|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14
|GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5
|GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pin : PD2 */
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* file: pointer to the source file name
* line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
I have kept all unused pins to analog mode, removed debugging probe and stopped it.
I don't see in this code where you're going in Low-power run mode. Am I missing it?
Include your IOC file if you can.
Sorry for delayed response, I have changed MSI clock frequency to 800kHz and passing it to SYSCLK. So, my system clock frequency is 0.8MHz already.
Please, refer to the screenshots and .IOC file attached. @KDJEM.1 @LPetr.1 @Tesla DeLorean @waclawek.jan
you guys have any idea what is going wrong ?
Thank you so much in advance.
