Posted on November 17, 2017 at 05:53i am facing the write and read issue in M95M02 EEPROM, i am follow the read write cycle as per data sheet.
but not write and read in EEPROM.
MCU: STM32F105RB.
my read write algorithm in below.
/************************************WRITE Algorithm******************************/
/**
* @brief Transmit a byte of data in blocking mode.
* @param addr: Data addresh
* @param ptr_dat: Pointer to data buffer
* @retval HAL status
*/
HAL_StatusTypeDef EEPROM_Byte_Write(uint8_t *ptr_dat, uint32_t addr)
{
HAL_StatusTypeDef status = HAL_OK;
uint8_t temp = 0x00, *ptr_temp = '\0';
/* Send Write Enable Command */
CHIP_SEL_RESET(); // Chip select Low
temp = (uint8_t)WREN;
HAL_SPI_Transmit(&hspi1, &temp, 1, 10);
HAL_Delay(10);
CHIP_SEL_SET(); // Chip select High
/* Send Write To Memory Array Command */
CHIP_SEL_RESET(); // Chip select Low
temp = (uint8_t)WR;
HAL_SPI_Transmit(&hspi1, &temp, 1, 10);
/* EEPROM 24 Bit Addresh Send */
ptr_temp = (uint8_t *)&addr;
HAL_SPI_Transmit(&hspi1, ptr_temp, 3, 10);
/* Sending One Byte In EEPROM */
status = HAL_SPI_Transmit(&hspi1, ptr_dat, 1, 10);
/* Send Write Disable Command */
temp = (uint8_t)WRDI;
HAL_SPI_Transmit(&hspi1, &temp, 1, 10);
CHIP_SEL_SET(); // Chip select High
return status;
}
/*************************************************************************************/
/************************************READ Algorithm*******************************/
/**
* @brief Receive a byte of data in blocking mode.
* @param addr: Data addresh
* @param ptr_dat: Pointer to data buffer
* @retval HAL status
*/
HAL_StatusTypeDef EEPROM_Byte_Read(uint8_t *ptr_dat, uint32_t addr)
{
HAL_StatusTypeDef status = HAL_OK;
uint8_t temp = 0x00, *ptr_temp = '\0';
/* Send Read To Memory Array Command */
CHIP_SEL_RESET(); // Chip select Low
HAL_Delay(10);
temp = (uint8_t)RD;
HAL_SPI_Transmit(&hspi1, &temp, 1, 10);
/* EEPROM 24 Bit Addresh Send */
ptr_temp = (uint8_t *)&addr;
HAL_SPI_Transmit(&hspi1, ptr_temp, 3, 10);
/* Receving One Byte From EEPROM */
status = HAL_SPI_Receive(&hspi1, ptr_dat, 1, 50);
CHIP_SEL_SET(); // Chip select High
return status;
}
/*************************************************************************************/
