System flash

System flash read/write functions. More...

Functions
void	sys_flashing_init ()
	Enable flashing.
void	sys_flashing_finish ()
	Disable flashing.
int	sys_flash_erase_block (void *start_addr, uint32_t size)
	Flash block erase.
int	sys_flash_write_block (void *dst_addr, uint8_t *src_buf, uint32_t size)
	Write data to flash.

Detailed Description

System flash read/write functions.

Be aware that:

• You can overwrite system or program code by writing to the wrong flash area.
• Whole flash is erased during firmware updates. Write/restore data to/from FAT disk to maintain the persistence.

Function Documentation

sys_flash_erase_block()

int sys_flash_erase_block	(	void *	start_addr,
		uint32_t	size )

Flash block erase.

Expects address and size aligned with flash block size

Parameters

start_addr	Starting address
size	Size in bytes to erase

Returns

0 on success

sys_flash_write_block()

int sys_flash_write_block	(	void *	dst_addr,
		uint8_t *	src_buf,
		uint32_t	size )

Write data to flash.

Expects destination address and size are multiples of 8

Parameters

dst_addr	Destination address
src_buf	Source buffer
size	Size in bytes

Returns

0 on success