C++ (Cpp) EEPROM_IO_ReadData Examples

Example #1

File: stm32f429i_discovery_eeprom.c Project: AMMayberry1/hongtao_imager

/**
  * @brief  Reads a block of data from the EEPROM.
  * @param  pBuffer : pointer to the buffer that receives the data read from 
  *         the EEPROM.
  * @param  ReadAddr : EEPROM's internal address to start reading from.
  * @param  NumByteToRead : pointer to the variable holding number of bytes to 
  *         be read from the EEPROM.
  * 
  *        @note The variable pointed by NumByteToRead is reset to 0 when all the 
  *              data are read from the EEPROM. Application should monitor this 
  *              variable in order know when the transfer is complete.
  * 
  * @retval EEPROM_OK (0) if operation is correctly performed, else return value 
  *         different from EEPROM_OK (0) or the timeout user callback.
  */
uint32_t BSP_EEPROM_ReadBuffer(uint8_t *pBuffer, uint16_t ReadAddr, uint16_t *NumByteToRead)
{  
  uint32_t buffersize = *NumByteToRead;
  
  /* Set the pointer to the Number of data to be read. This pointer will be used 
  by the DMA Transfer Completer interrupt Handler in order to reset the 
  variable to 0. User should check on this variable in order to know if the 
  DMA transfer has been complete or not. */
  EEPROMDataRead = *NumByteToRead;
  
  if (EEPROM_IO_ReadData(EEPROMAddress, ReadAddr, pBuffer, buffersize) != HAL_OK)
  {
    return EEPROM_FAIL;
  }

  /* Wait transfer through DMA to be complete */
  EEPROMTimeout = HAL_GetTick() + EEPROM_READ_TIMEOUT;
  while (EEPROMDataRead > 0)
  {
    if(HAL_GetTick() > EEPROMTimeout)
    {
      BSP_EEPROM_TIMEOUT_UserCallback();
      return EEPROM_TIMEOUT;
    }
  }
  
  /* If all operations OK, return EEPROM_OK (0) */
  return EEPROM_OK;
}

Example #2

File: stm32091c_eval_eeprom.c Project: NjordCZ/stm32cubef0

/**
  * @brief  Reads a block of data from the I2C EEPROM.
  * @param  pBuffer : pointer to the buffer that receives the data read from 
  *         the EEPROM.
  * @param  ReadAddr : EEPROM's internal address to start reading from.
  * @param  NumByteToRead : pointer to the variable holding number of bytes to 
  *         be read from the EEPROM.
  * 
  * @retval EEPROM_OK (0) if operation is correctly performed, else return value 
  *         different from EEPROM_OK (0) or the timeout user callback.
  */
static uint32_t EEPROM_I2C_ReadBuffer(uint8_t* pBuffer, uint16_t ReadAddr, uint32_t* NumByteToRead)
{  
  uint32_t buffersize = *NumByteToRead;
  
  if (EEPROM_IO_ReadData(EEPROMAddress, ReadAddr, pBuffer, buffersize) != HAL_OK)
  {
    return EEPROM_FAIL;
  }
  
  /* If all operations OK, return EEPROM_OK (0) */
  return EEPROM_OK;
}

Example #3

File: stm324xg_eval_eeprom.c Project: Joe-Merten/Stm32-Tools-Evaluation

/**
  * @brief  Reads a block of data from the EEPROM.
  * @param  pBuffer: pointer to the buffer that receives the data read from
  *         the EEPROM.
  * @param  ReadAddr: EEPROM's internal address to start reading from.
  * @param  NumByteToRead: pointer to the variable holding number of bytes to
  *         be read from the EEPROM.
  *
  *        @note The variable pointed by NumByteToRead is reset to 0 when all the
  *              data are read from the EEPROM. Application should monitor this
  *              variable in order know when the transfer is complete.
  *
  * @retval EEPROM_OK (0) if operation is correctly performed, else return value
  *         different from EEPROM_OK (0) or the timeout user callback.
  */
uint32_t BSP_EEPROM_ReadBuffer(uint8_t* pBuffer, uint16_t ReadAddr, uint16_t* NumByteToRead)
{
  uint32_t buffersize = *NumByteToRead;

  /* Set the pointer to the Number of data to be read */
  EEPROMDataRead = *NumByteToRead;

  if(EEPROM_IO_ReadData(EEPROM_I2C_ADDRESS, ReadAddr, pBuffer, buffersize) != HAL_OK)
  {
    BSP_EEPROM_TIMEOUT_UserCallback();
    return EEPROM_FAIL;
  }

  /* If all operations OK, return EEPROM_OK (0) */
  return EEPROM_OK;
}