EEPROM Exported Functions

Functions
uint32_t	BSP_EEPROM_Init (void)
	Initializes peripherals used by the I2C EEPROM driver.
uint8_t	BSP_EEPROM_DeInit (void)
	DeInitializes the EEPROM.
uint32_t	BSP_EEPROM_ReadBuffer (uint8_t *pBuffer, uint16_t ReadAddr, uint16_t *NumByteToRead)
	Reads a block of data from the EEPROM.
uint32_t	BSP_EEPROM_WritePage (uint8_t *pBuffer, uint16_t WriteAddr, uint8_t *NumByteToWrite)
	Writes more than one byte to the EEPROM with a single WRITE cycle.
uint32_t	BSP_EEPROM_WriteBuffer (uint8_t *pBuffer, uint16_t WriteAddr, uint16_t NumByteToWrite)
	Writes buffer of data to the I2C EEPROM.
uint32_t	BSP_EEPROM_WaitEepromStandbyState (void)
	Wait for EEPROM Standby state.
__weak void	BSP_EEPROM_TIMEOUT_UserCallback (void)
	Basic management of the timeout situation.

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Function Documentation

uint8_t BSP_EEPROM_DeInit

(

void

)

DeInitializes the EEPROM.

Return values:

EEPROM

state

Definition at line 177 of file stm32h743i_eval_eeprom.c.

References EEPROM_OK.

uint32_t BSP_EEPROM_Init

(

void

)

Initializes peripherals used by the I2C EEPROM driver.

Note:

There are 2 different versions of M24LR64 (A01 & A02). Then try to connect on 1st one (EEPROM_I2C_ADDRESS_A01) and if problem, check the 2nd one (EEPROM_I2C_ADDRESS_A02)

Return values:

EEPROM_OK

(0) if operation is correctly performed, else return value different from EEPROM_OK (0)

Definition at line 154 of file stm32h743i_eval_eeprom.c.

References EEPROM_FAIL, EEPROM_I2C_ADDRESS_A01, EEPROM_I2C_ADDRESS_A02, EEPROM_IO_Init(), EEPROM_IO_IsDeviceReady(), EEPROM_MAX_TRIALS, EEPROM_OK, and EEPROMAddress.

uint32_t BSP_EEPROM_ReadBuffer	(	uint8_t *	pBuffer,
		uint16_t	ReadAddr,
		uint16_t *	NumByteToRead
	)

Reads a block of data from the EEPROM.

Parameters:

pBuffer,:	pointer to the buffer that receives the data read from the EEPROM.
ReadAddr,:	EEPROM's internal address to start reading from.
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.

Return values:

EEPROM_OK

(0) if operation is correctly performed, else return value different from EEPROM_OK (0) or the timeout user callback.

Definition at line 198 of file stm32h743i_eval_eeprom.c.

References BSP_EEPROM_TIMEOUT_UserCallback(), EEPROM_FAIL, EEPROM_IO_ReadData(), EEPROM_OK, EEPROMAddress, and EEPROMDataRead.

void BSP_EEPROM_TIMEOUT_UserCallback

(

void

)

Basic management of the timeout situation.

Return values:

None

Definition at line 453 of file stm32h743i_eval_eeprom.c.

Referenced by BSP_EEPROM_ReadBuffer(), BSP_EEPROM_WaitEepromStandbyState(), and BSP_EEPROM_WritePage().

uint32_t BSP_EEPROM_WaitEepromStandbyState

(

void

)

Wait for EEPROM Standby state.

Note:

This function allows to wait and check that EEPROM has finished the last operation. It is mostly used after Write operation: after receiving the buffer to be written, the EEPROM may need additional time to actually perform the write operation. During this time, it doesn't answer to I2C packets addressed to it. Once the write operation is complete the EEPROM responds to its address.

Return values:

EEPROM_OK

(0) if operation is correctly performed, else return value different from EEPROM_OK (0) or the timeout user callback.

Definition at line 437 of file stm32h743i_eval_eeprom.c.

References BSP_EEPROM_TIMEOUT_UserCallback(), EEPROM_IO_IsDeviceReady(), EEPROM_MAX_TRIALS, EEPROM_OK, EEPROM_TIMEOUT, and EEPROMAddress.

Referenced by BSP_EEPROM_WritePage().

uint32_t BSP_EEPROM_WriteBuffer	(	uint8_t *	pBuffer,
		uint16_t	WriteAddr,
		uint16_t	NumByteToWrite
	)

Writes buffer of data to the I2C EEPROM.

Parameters:

pBuffer,:	pointer to the buffer containing the data to be written to the EEPROM.
WriteAddr,:	EEPROM's internal address to write to.
NumByteToWrite,:	number of bytes to write to the EEPROM.

Return values:

EEPROM_OK

(0) if operation is correctly performed, else return value different from EEPROM_OK (0) or the timeout user callback.

Definition at line 280 of file stm32h743i_eval_eeprom.c.

References BSP_EEPROM_WritePage(), EEPROM_OK, and EEPROM_PAGESIZE.

uint32_t BSP_EEPROM_WritePage	(	uint8_t *	pBuffer,
		uint16_t	WriteAddr,
		uint8_t *	NumByteToWrite
	)

Writes more than one byte to the EEPROM with a single WRITE cycle.

Note:

The number of bytes (combined to write start address) must not cross the EEPROM page boundary. This function can only write into the boundaries of an EEPROM page. This function doesn't check on boundaries condition (in this driver the function BSP_EEPROM_WriteBuffer() which calls BSP_EEPROM_WritePage() is responsible of checking on Page boundaries).

Parameters:

pBuffer,:	pointer to the buffer containing the data to be written to the EEPROM.
WriteAddr,:	EEPROM's internal address to write to.
NumByteToWrite,:	pointer to the variable holding number of bytes to be written into the EEPROM.

Note:

The variable pointed by NumByteToWrite is reset to 0 when all the data are written to the EEPROM. Application should monitor this variable in order know when the transfer is complete.

This function just configure the communication and enable the DMA channel to transfer data. Meanwhile, the user application may perform other tasks in parallel.

Return values:

EEPROM_OK

(0) if operation is correctly performed, else return value different from EEPROM_OK (0) or the timeout user callback.

Definition at line 245 of file stm32h743i_eval_eeprom.c.

References BSP_EEPROM_TIMEOUT_UserCallback(), BSP_EEPROM_WaitEepromStandbyState(), EEPROM_FAIL, EEPROM_IO_WriteData(), EEPROM_OK, EEPROMAddress, and EEPROMDataWrite.

Referenced by BSP_EEPROM_WriteBuffer().