How to config SMBUS Slave mode and how to get the data once address is acknowledge

[suguresh_m]

void HAL_SMBUS_ErrorCallback(SMBUS_HandleTypeDef* SMBUSHandle)
{
  /** Error_Handler() function is called when error occurs.
   * 1- When Slave doesn't acknowledge its address, Master restarts
   * communication. 2- When Master doesn't acknowledge the last data
   * transferred, Slave doesn't care in this example.
   */
  if (HAL_SMBUS_GetError(SMBUSHandle) != HAL_SMBUS_ERROR_ACKF)
  {
    printf("failed\r\n");
    /* Turn Off LED2 */
  }
}

/**
 * @brief Slave Address Match callbacks.
 *  hsmbus : Pointer to a SMBUS_HandleTypeDef structure that contains
 * the configuration information for the specified SMBUS.
 * @retval None
 */
void HAL_SMBUS_AddrCallback(SMBUS_HandleTypeDef* hsmbus, uint8_t TransferDirection, uint16_t AddrMatchCode)
{
  SlaveAddrMatchCode = (AddrMatchCode << 1);
  HAL_SMBUS_EnableListen_IT(&hsmbus1);
  uint8_t tx_buff = 0x00;
  HAL_SMBUS_Slave_Transmit_IT(&hsmbus1, &tx_buff, 1, SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC);
  // HAL_SMBUS_Slave_Transmit_IT(&hsmbus1, &aTxBuffer, 1,
  // SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC);
  UNUSED(TransferDirection);
}
void HAL_SMBUS_SlaveRxCpltCallback(SMBUS_HandleTypeDef* hsmbus)
{
  HAL_SMBUS_Slave_Receive_IT(&hsmbus1, dummy_data, 2, SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC);
}

//
// return 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_USART3_UART_Init();
  MX_USART2_UART_Init();
  MX_TIM1_Init();
  MX_I2C1_SMBUS_Init();
  MX_I2C3_SMBUS_Init();
  /* USER CODE BEGIN 2 */

  /* Enable the Analog SMBUS Filter */
  HAL_SMBUS_ConfigAnalogFilter(&hsmbus1, SMBUS_ANALOGFILTER_ENABLE);

  /* Enable address Match detect with interrupt */
  HAL_SMBUS_EnableListen_IT(&hsmbus1);
  /* Wait until address matched */

  while (SlaveAddrMatchCode != SMBUS_ADDRESS)
    ;

  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

[suguresh_m]

Edited by ST moderator to be inline with the community rules especially with the code sharing. In next time please use </> button to paste your code. Please read this post: How to insert source code.

void HAL_SMBUS_ErrorCallback(SMBUS_HandleTypeDef* SMBUSHandle)
{
  /** Error_Handler() function is called when error occurs.
   * 1- When Slave doesn't acknowledge its address, Master restarts
   * communication. 2- When Master doesn't acknowledge the last data
   * transferred, Slave doesn't care in this example.
   */
  if (HAL_SMBUS_GetError(SMBUSHandle) != HAL_SMBUS_ERROR_ACKF)
  {
    printf("failed\r\n");
    /* Turn Off LED2 */
  }
}

/**
 * @brief Slave Address Match callbacks.
 *  hsmbus : Pointer to a SMBUS_HandleTypeDef structure that contains
 * the configuration information for the specified SMBUS.
 * @retval None
 */
void HAL_SMBUS_AddrCallback(SMBUS_HandleTypeDef* hsmbus, uint8_t TransferDirection, uint16_t AddrMatchCode)
{
  SlaveAddrMatchCode = (AddrMatchCode << 1);
  HAL_SMBUS_EnableListen_IT(&hsmbus1);
  uint8_t tx_buff = 0x00;
  HAL_SMBUS_Slave_Transmit_IT(&hsmbus1, &tx_buff, 1, SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC);
  // HAL_SMBUS_Slave_Transmit_IT(&hsmbus1, &aTxBuffer, 1,
  // SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC);
  UNUSED(TransferDirection);
}
void HAL_SMBUS_SlaveRxCpltCallback(SMBUS_HandleTypeDef* hsmbus)
{
  HAL_SMBUS_Slave_Receive_IT(&hsmbus1, dummy_data, 2, SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC);
}

//
// return 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_USART3_UART_Init();
  MX_USART2_UART_Init();
  MX_TIM1_Init();
  MX_I2C1_SMBUS_Init();
  MX_I2C3_SMBUS_Init();
  /* USER CODE BEGIN 2 */

  /* Enable the Analog SMBUS Filter */
  HAL_SMBUS_ConfigAnalogFilter(&hsmbus1, SMBUS_ANALOGFILTER_ENABLE);

  /* Enable address Match detect with interrupt */
  HAL_SMBUS_EnableListen_IT(&hsmbus1);
  /* Wait until address matched */

  while (SlaveAddrMatchCode != SMBUS_ADDRESS)
    ;

  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

[suguresh_m]

Please provide me a solution with SMBUS In SLAVE configuration without PEC or with PEC 

[MOBEJ · Accepted solution]

Hello @suguresh_m , 

I recommend downloading the X-CUBE-SMBUS Expansion Package, which contains the SMBus/PMBus® stack implementation for STM32Cube. This package provides example projects and basic functionality tests for the following boards: NUCLEO-G431RB ,NUCLEO-H743ZI,NUCLEO-L4R5ZI & NUCLEO-WB55RG ...

You can download the package directly from ST's official website here:
https://www.st.com/en/embedded-software/x-cube-smbus.html

Additionally, I suggest reviewing the related Application Note for detailed guidance:
https://www.st.com/resource/en/application_note/an4502-stm32-smbuspmbus-expansion-package-for-stm32cube-stmicroelectronics.pdf

This resource should be very helpful in resolving your issue.

Br

[Saket_Om]

Hello @suguresh_m 

An example of an SMBus receive implementation is provided below.

#include "stm32xxxx_hal.h" // Replace with your specific device header

// --- Global Variables ---
SMBUS_HandleTypeDef SmbusHandle;
uint8_t RxBuffer[NUMDATA]; // Define NUMDATA as needed
uint16_t Smbus_adresse = 0xXX; // Set your slave address here
uint16_t SlaveAddrMatchCode = 0;

// --- Function Prototypes ---
void SystemClock_Config(void);
void Error_Handler(void);

// --- Main Function ---
int main(void)
{
    HAL_Init();
    SystemClock_Config();

    // Initialize SMBUS
    HAL_SMBUS_Init(&SmbusHandle);

    // Enable Listen mode with interrupt
    if (HAL_SMBUS_EnableListen_IT(&SmbusHandle) != HAL_OK)
    {
        Error_Handler();
    }

    // Main loop
    while (1)
    {
        // Your main code here
    }
}

// --- Address Match Callback ---
void HAL_SMBUS_AddrCallback(SMBUS_HandleTypeDef *hsmbus, uint8_t TransferDirection, uint16_t AddrMatchCode)
{
    SlaveAddrMatchCode = (AddrMatchCode << 1);

    if (SlaveAddrMatchCode == Smbus_adresse)
    {
        // Start receiving data in interrupt mode
        if (HAL_SMBUS_Slave_Receive_IT(hsmbus, RxBuffer, NUMDATA, SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC) != HAL_OK)
        {
            Error_Handler();
        }
    }
}

// --- Error Handler ---
void Error_Handler(void)
{
    // User can add error handling here
    while (1)
    {
        // Stay here
    }
}

// --- System Clock Configuration ---
// Implement this function as per your MCU and application requirements
void SystemClock_Config(void)
{
    // System clock configuration code
}

[suguresh_m]

im receiving 5pckets to read and write means vise versa once i get some data i need to reply with some data. but its not synchronizing. i tried lot of example but timing issues unable to handle 

[suguresh_m]

hi MOBEJ,

i tried these examples but no luck.