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HAL_I2C_IsDeviceReady = HAL_ERROR

Malek Mahar
Associate II

Hi,

i'm trying to connect an STM32L072cz mcu ( as a master ) to a gas-module (as a slave) which 7-bit address from data sheet is "1100101b",

Wiring, pull-up resistors are placed correctly,

i'm trying to test if the communication is well established between the MCU and the sensor, but all I have is a HAL_ERROR from HAL_I2C_IsDeviceReady(),

NB : THIS CODE IS AUTOMATICALLY GENERATED FROM CubeMX

this is my code :

/* USER CODE BEGIN Header */

/**

 ******************************************************************************

 * @file      : main.c

 * @brief     : Main program body

 ******************************************************************************

 * @attention

 *

 * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.

 * All rights reserved.</center></h2>

 *

 * This software component is licensed by ST under BSD 3-Clause license,

 * the "License"; You may not use this file except in compliance with the

 * License. You may obtain a copy of the License at:

 *            opensource.org/licenses/BSD-3-Clause

 *

 ******************************************************************************

 */

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "stdio.h"

/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

HAL_StatusTypeDef ret;

volatile uint8_t i;

/* 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 ---------------------------------------------------------*/

I2C_HandleTypeDef hi2c1;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_I2C1_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();

 MX_I2C1_Init();

 /* USER CODE BEGIN 2 */

  

 for(i=0; i<255; i++)

  {

   ret = HAL_I2C_IsDeviceReady(&hi2c1, i, 10, 100);

   printf("i= %d\n", i);

   if(ret == HAL_OK)

   {

    printf("OK");

    break;

   }

  }

 /* 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};

 RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

 /** Configure the main internal regulator output voltage

 */

 __HAL_PWR_VOLTAGESCALING_CONFIG(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 = 0;

 RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;

 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_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;

 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)

 {

  Error_Handler();

 }

 PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_I2C1;

 PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_PCLK1;

 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

 {

  Error_Handler();

 }

}

/**

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 = 0x00000000;

 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();

 }

 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();

 }

 /** I2C Fast mode Plus enable

 */

 HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C1);

 /* USER CODE BEGIN I2C1_Init 2 */

 /* USER CODE END I2C1_Init 2 */

}

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();

 /*Configure GPIO pin Output Level */

 HAL_GPIO_WritePin(RESET_GPIO_Port, RESET_Pin, GPIO_PIN_RESET);

}

and this is the result after debugging,

0693W00000BaRalQAF.jpg 

1 ACCEPTED SOLUTION

Accepted Solutions
TDK
Guru

HAL_ERROR indicates there is no slave device that responds to that address. More information is in the ErrorCode parameter.

https://github.com/STMicroelectronics/STM32CubeL0/blob/a7b74aed35ecb7baeadeb16107aa8fddb6823589/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_i2c.c#L3147

Note that slave address are 7 bits (not 8) and should be left-aligned.

Recheck wiring and external pullup resistors. Put a scope on SDA/SCL to verify signal is sent correctly.

If you feel a post has answered your question, please click "Accept as Solution".

View solution in original post

2 REPLIES 2
TDK
Guru

HAL_ERROR indicates there is no slave device that responds to that address. More information is in the ErrorCode parameter.

https://github.com/STMicroelectronics/STM32CubeL0/blob/a7b74aed35ecb7baeadeb16107aa8fddb6823589/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_i2c.c#L3147

Note that slave address are 7 bits (not 8) and should be left-aligned.

Recheck wiring and external pullup resistors. Put a scope on SDA/SCL to verify signal is sent correctly.

If you feel a post has answered your question, please click "Accept as Solution".

Thank you​