STM32G0: cannot activate GPIOB AND GPIOD

[kuda1311]

I have an other issue at the moment. I cant use the GPIOD, VSSI02 is on 3.3V. Im using stm32g0b1kb. It wont toggle it wont read, it does nothing. I have created a small application far away from my main app just to test the GPIO functions.

Hi, I a already Figured it out. But Thank you for the response. I have an other issue at the moment. I cant use the GPIOD, VSSI02 is on 3.3V. Im using stm32g0b1kb. It wont toggle it wont read, it does nothing. What am I missing.

I cant toggle, read or write them? PB9 PB6, and PD1 to PD3

/* 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 */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
void Check_VDDIO2_Status(void);
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
uint8_t rd10_switch_ready = 0;
volatile uint32_t current_time = 0;
volatile uint32_t previous_time = 0;
/* 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 */

/* 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 */

  /* PWR-Clock sicherstellen (falls nicht schon in SystemClock_Config getan) */
  __HAL_RCC_PWR_CLK_ENABLE();

  /* VDDIO2 einmal definierte Reihenfolge: erst aus, dann an */
  HAL_PWREx_DisableVddIO2();
  HAL_Delay(10);

  HAL_PWREx_EnableVddIO2(); // aktiviert die Domäne per Software
  HAL_Delay(10);            // etwas Wartezeit
  Check_VDDIO2_Status();    // prüft das Status-Register
  HAL_SYSCFG_StrobeDBattpinsConfig(SYSCFG_CFGR1_UCPD2_STROBE);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

          HAL_GPIO_TogglePin(iBIT1_GPIO_Port, iBIT1_Pin);
//      GPIO_PinState p2 = HAL_GPIO_ReadPin(iBIT2_GPIO_Port, iBIT2_Pin);
//      GPIO_PinState p3 = HAL_GPIO_ReadPin(iBIT3_GPIO_Port, iBIT3_Pin);
//      GPIO_PinState p4 = HAL_GPIO_ReadPin(iBIT4_GPIO_Port, iBIT4_Pin);

      /* Hier Breakpoint setzen und p1–p4 beobachten */
      HAL_Delay(100);

    /* 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_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 8;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  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_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @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 */
  /* Ports aktivieren: hier minimal die Ports, auf denen deine iBIT-Pins liegen */
  /* Wenn z.B. iBIT1 auf GPIOB, iBIT4 auf GPIOD liegt, musst du beide aktivieren. */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  /* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin : iBIT1_Pin */
  GPIO_InitStruct.Pin = iBIT1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(iBIT1_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pins : iBIT2_Pin iBIT3_Pin */
  GPIO_InitStruct.Pin = iBIT2_Pin|iBIT3_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /*Configure GPIO pin : iBIT4_Pin */
  GPIO_InitStruct.Pin = iBIT4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(iBIT4_GPIO_Port, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI0_1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI0_1_IRQn);

  /* USER CODE BEGIN MX_GPIO_Init_2 */
  /* iBIT1: Interrupt-Eingang (Rising) */
  GPIO_InitStruct.Pin = iBIT1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(iBIT1_GPIO_Port, &GPIO_InitStruct);

  /* iBIT2: normaler digitaler Eingang */
  GPIO_InitStruct.Pin = iBIT2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(iBIT2_GPIO_Port, &GPIO_InitStruct);

  /* iBIT3: normaler digitaler Eingang (nicht analog, wenn du ihn lesen willst) */
  GPIO_InitStruct.Pin = iBIT3_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(iBIT3_GPIO_Port, &GPIO_InitStruct);

  /* iBIT4: normaler digitaler Eingang */
  GPIO_InitStruct.Pin = iBIT4_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(iBIT4_GPIO_Port, &GPIO_InitStruct);

  /* EXTI interrupt init – nur nötig, wenn iBIT1 auch wirklich an EXTI0_1 hängt */
  HAL_NVIC_SetPriority(EXTI0_1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI0_1_IRQn);
  /* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

void Check_VDDIO2_Status(void)
{
    uint32_t sr2 = PWR->SR2;

    /* Hier könntest du gezielt auf ein bestimmtes Bit prüfen, z.B.:
       if (sr2 & PWR_SR2_PVMO2) { ... } */

    if (sr2)
    {
        uint8_t a = 0;
        (void)a;
    }
    else
    {
        uint8_t a = 1;
        (void)a;
    }
}

/**
  * @brief  EXTI line rising detection callback.
  * @PAram  GPIO_Pin: Specifies the pins connected EXTI line
  * @retval None
  */
void HAL_GPIO_EXTI_Rising_Callback(uint16_t GPIO_Pin)
{
    current_time = HAL_GetTick();

    if ((GPIO_Pin == iBIT1_Pin) && ((current_time - previous_time) > 100))
    {
        rd10_switch_ready = 1;
        previous_time = current_time;
    }
    else
    {
        rd10_switch_ready = 0;
    }
}

/**
  * @brief  EXTI line falling detection callback.
  * @PAram  GPIO_Pin: Specifies the pins connected EXTI line
  * @retval None
  */
void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin)
{
    current_time = HAL_GetTick();

    if ((GPIO_Pin == iBIT1_Pin) && ((current_time - previous_time) > 100))
    {
        rd10_switch_ready = 1;
        previous_time = current_time;
    }
    else
    {
        rd10_switch_ready = 0;
    }
}

/* 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 */
  __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 CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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Edited to apply source code formatting - please see How to insert source code for future reference.

[Andrew Neil]

---

@kuda1311 wrote:

Waht is the difference between KBU6 and KBU6N?

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See the datasheet text which is immediately above the screenshot which @AScha.3 posted:

and Table 2:

[TDK]

Certainly seems that way. I doubt the marking is the same for both of them.