Flash Manager

Functions to control the ST MP25P80 serial flash device. More...

Functions
bool_t	flashIsWriteInProgress ()
	Determine if a flash write or erase operation is currently in progress.
void	flashReadBlock (uint32_t address, uint8_t *block, uint16_t length)
	Read a block of memory from the flash device.
void	flashWriteBlock (uint32_t address, uint8_t *block, uint8_t length)
	Write a block of memory to the flash device.
void	flashErase ()
	Erase the entire flash device (all locations set to 0xff).
uint8_t	flashReadElectronicSignature ()
	Read the flash electronic signature byte.
uint8_t	flashGetByte ()
	Read a single byte from the flash device through the serial interface.
void	flashInit ()
	Initialize the flash memory subsystem.
void	flashSendByte (uint8_t value)
	Write a single byte to the flash device through the serial interface.
void	flashSendAddress (uint32_t address)
	Write the 24-bit address to the flash device through the serial interface.

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Detailed Description

Functions to control the ST MP25P80 serial flash device.

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Function Documentation

void flashErase

(

)

Erase the entire flash device (all locations set to 0xff).

References flashIsWriteInProgress(), flashSendByte(), and IO_FLASH_CS.

Referenced by diagEraseFlash().

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uint8_t flashGetByte

(

)

Read a single byte from the flash device through the serial interface.

This function only controls the clock line. The chip select must be configured before calling this function.

Returns:

byte read from device

Referenced by flashIsWriteInProgress(), flashReadBlock(), and flashReadElectronicSignature().

void flashInit

(

)

Initialize the flash memory subsystem.

References IO_FLASH_CS.

bool_t flashIsWriteInProgress

(

)

Determine if a flash write or erase operation is currently in progress.

Returns:

true if write/erase in progress

References flashGetByte(), flashSendByte(), and IO_FLASH_CS.

Referenced by flashErase(), and flashWriteBlock().

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void flashReadBlock	(	uint32_t	address,
		uint8_t *	block,
		uint16_t	length
	)

Read a block of memory from the flash device.

Parameters:

	address	of desired location in the range 0x00000 to 0xFFFFF (1MB)
	block	pointer to locate of data block
	length	number of bytes to read

References flashGetByte(), flashSendAddress(), flashSendByte(), and IO_FLASH_CS.

Referenced by diagReadFlash(), and logInit().

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uint8_t flashReadElectronicSignature

(

)

Read the flash electronic signature byte.

This method is typically used for engineering and test functions.

Returns:

electronic signature

References flashGetByte(), flashSendByte(), and IO_FLASH_CS.

Referenced by diagPort().

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void flashSendAddress

(

uint32_t

address

)

Write the 24-bit address to the flash device through the serial interface.

This function only controls the clock line. The chip select must be configured before calling this function.

Parameters:

address

24-bit flash device address

Referenced by flashReadBlock(), and flashWriteBlock().

void flashSendByte

(

uint8_t

value

)

Write a single byte to the flash device through the serial interface.

This function only controls the clock line. The chip select must be configured before calling this function.

Parameters:

value

byte to write to device

Referenced by flashErase(), flashIsWriteInProgress(), flashReadBlock(), flashReadElectronicSignature(), and flashWriteBlock().

void flashWriteBlock	(	uint32_t	address,
		uint8_t *	block,
		uint8_t	length
	)

Write a block of memory to the flash device.

Parameters:

	address	of desired location in the range 0x00000 to 0xFFFFF (1MB)
	block	pointer data block to write
	length	number of bytes to write

References flashIsWriteInProgress(), flashSendAddress(), flashSendByte(), and IO_FLASH_CS.

Referenced by logFlush().

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