flash functions More...

Ameba Common
typedef struct flash_s	flash_t

void	flash_erase_sector (flash_t *obj, uint32_t address)
	Erase flash sector. More...

void	flash_erase_block (flash_t *obj, uint32_t address)
	Erase flash block(64KB) More...

int	flash_read_word (flash_t obj, uint32_t address, uint32_t data)
	Read a word from specified address. More...

int	flash_write_word (flash_t *obj, uint32_t address, uint32_t data)
	Write a word to specified address. More...

int	flash_stream_read (flash_t obj, uint32_t address, uint32_t len, uint8_t data)
	Read a stream of data from specified address. More...

int	flash_stream_write (flash_t obj, uint32_t address, uint32_t len, uint8_t data)
	Write a stream of data to specified address. More...

void	flash_write_protect (flash_t *obj, uint32_t protect)
	Control the flash chip write protect enable/disable. More...

int	flash_get_status (flash_t *obj)
	Get the value of status register1. More...

int	flash_set_status (flash_t *obj, uint32_t data)
	Set Status register to enable desired operation. More...

void	flash_reset_status (flash_t *obj)
	This function aims to reset the status register, please make sure the operation is appropriate. More...

int	flash_burst_write (flash_t obj, uint32_t address, uint32_t Length, uint8_t data)
	It is the same with flash_stream_write function which is used to write a stream of data to specified address. More...

int	flash_burst_read (flash_t obj, uint32_t address, uint32_t Length, uint8_t data)
	It is the same with flash_stream_read function which is used to read a stream of data from specified address. More...

int	flash_set_extend_addr (flash_t *obj, uint32_t data)
	This function is only for Micron 128MB flash to access beyond 16MB by switching between eight 16MB-area(segment). Please refer to flash datasheet for more information about memory mapping. More...

int	flash_get_extend_addr (flash_t *obj)
	This function is only for Micron 128MB flash to read from Extended Address Register, which shows the current segment. Please refer to flash datasheet for more information about memory mapping. More...

int	flash_read_id (flash_t obj, uint8_t buf, uint8_t len)
	Get flash ID (command: 0x9F). More...

int	flash_read_unique_id (flash_t obj, uint8_t buf, uint8_t len)
	This function is only for Winbond flash to get unique ID (command: 0x4B). More...

AmebaZ Only
void	flash_erase_chip (flash_t *obj)
	Erase the whole flash chip. More...

Detailed Description

flash functions

Function Documentation

int flash_burst_read	(	flash_t *	obj,
		uint32_t	address,
		uint32_t	Length,
		uint8_t *	data
	)

It is the same with flash_stream_read function which is used to read a stream of data from specified address.

Parameters

obj	Flash object define in application software.
address	Specifies the starting address to read from.
len	Specifies the length of the data to read.
data	Specified the address to save the readback data.

Return values

1 Success

int flash_burst_write	(	flash_t *	obj,
		uint32_t	address,
		uint32_t	Length,
		uint8_t *	data
	)

It is the same with flash_stream_write function which is used to write a stream of data to specified address.

Parameters

obj	Flash object define in application software.
address	Specifies the starting address to write to.
len	Specifies the length of the data to write.
data	Pointer to a byte array that is to be written.

Return values

1 Success

void flash_erase_block	(	flash_t *	obj,
		uint32_t	address
	)

Erase flash block(64KB)

Parameters

obj	Flash object define in application software.
address	Specifies the starting address to be erased.LSB 16bits will be masked.

Return values

none

void flash_erase_chip ( flash_t * obj )

Erase the whole flash chip.

Parameters

obj	Flash object define in application software.

Return values

none

void flash_erase_sector	(	flash_t *	obj,
		uint32_t	address
	)

Erase flash sector.

Parameters

obj	Flash object define in application software.
address	Specifies the starting address to be erased.

Return values

none

int flash_get_extend_addr ( flash_t * obj )

This function is only for Micron 128MB flash to read from Extended Address Register, which shows the current segment. Please refer to flash datasheet for more information about memory mapping.

Parameters

obj	Flash object define in application software.

Return values

The value of current Extended Address Register.

int flash_get_status ( flash_t * obj )

Get the value of status register1.

Parameters

obj	Flash object define in application software.

Return values

The value of status register1.

int flash_read_id	(	flash_t *	obj,
		uint8_t *	buf,
		uint8_t	len
	)

Get flash ID (command: 0x9F).

Parameters

obj	Flash object define in application software.
buf	Pointer to a byte array to save the readback ID.
len	Specifies the length of the buf. It should be 3.

Return values

-1 Fail.

int flash_read_unique_id	(	flash_t *	obj,
		uint8_t *	buf,
		uint8_t	len
	)

This function is only for Winbond flash to get unique ID (command: 0x4B).

Parameters

obj	Flash object define in application software.
buf	Pointer to a byte array to save the readback unique ID.
len	Specifies the length of the buf. It should be 8.

Return values

-1 Fail.

int flash_read_word	(	flash_t *	obj,
		uint32_t	address,
		uint32_t *	data
	)

Read a word from specified address.

Parameters

obj	Flash object define in application software.
address	Specifies the address to read from.
data	Specified the address to save the readback data.

Return values

1 Success

Note: auto mode read is ok, because we have flash cache

void flash_reset_status ( flash_t * obj )

This function aims to reset the status register, please make sure the operation is appropriate.

Parameters

obj	Specifies the parameter of flash object.

Return values

none

int flash_set_extend_addr	(	flash_t *	obj,
		uint32_t	data
	)

This function is only for Micron 128MB flash to access beyond 16MB by switching between eight 16MB-area(segment). Please refer to flash datasheet for more information about memory mapping.

Parameters

obj	Flash object define in application software.
data	Specified which segment to choose.

Return values

1 Success

int flash_set_status	(	flash_t *	obj,
		uint32_t	data
	)

Set Status register to enable desired operation.

Parameters

obj	Specifies the parameter of flash object.
data	Specifies which bit users like to set. ex: if users want to set the third bit, data = 0x8.

Return values

1 Success

Note: Please refer to the datatsheet of flash for more details of the content of status register. The block protected area and the corresponding control bits are provided in the flash datasheet.

int flash_stream_read	(	flash_t *	obj,
		uint32_t	address,
		uint32_t	len,
		uint8_t *	data
	)

Read a stream of data from specified address.

Parameters

obj	Flash object define in application software.
address	Specifies the starting address to read from.
len	Specifies the length of the data to read.
data	Specified the address to save the readback data.

Return values

1 Success

Note: auto mode is ok, because we have flash cache

int flash_stream_write	(	flash_t *	obj,
		uint32_t	address,
		uint32_t	len,
		uint8_t *	data
	)

Write a stream of data to specified address.

Parameters

obj	Flash object define in application software.
address	Specifies the starting address to write to.
len	Specifies the length of the data to write.
data	Pointer to a byte array that is to be written.

Return values

1 Success

void flash_write_protect	(	flash_t *	obj,
		uint32_t	protect
	)

Control the flash chip write protect enable/disable.

Parameters

obj	Flash object define in application software.
protect	This parameter can be 1 or 0. 1: Protect the whole chip from being programmed/erased. 0: Unprotect the whole chip from being programmed/erased.

Return values

none

int flash_write_word	(	flash_t *	obj,
		uint32_t	address,
		uint32_t	data
	)

Write a word to specified address.

Parameters

obj	Flash object define in application software.
address	Specifies the address to be programmed to.
data	Specified the data to be programmed.

Return values

1 Success

Note: user mode write used

Ameba Common

AmebaZ Only

Detailed Description

Function Documentation