Ice_sram

SRAM chip I/O. More...

Macros
#define	ICE_SRAM_STATUS_BUSY_MASK   0x01
#define	ICE_SRAM_TRANSFER_SIZE   32

Functions
void	ice_sram_init (void)
	Send an initialization command to the SRAM chip.
void	ice_sram_reset (void)
	Send a reset command to the SRAM chipo.
void	ice_sram_get_id (uint8_t id[8])
	Obtain the chip ID from the SRAM chip.
void	ice_sram_write_async (uint32_t addr, const uint8_t *data, size_t data_size, void(*callback)(volatile void *), void *context)
	Calling this function when any SPI transfer is in progress on this bus waits for it then starts.
void	ice_sram_write_blocking (uint32_t addr, const uint8_t *data, size_t data_size)
	Write a buffer to the flash chip and wait until completion.
void	ice_sram_read_async (uint32_t addr, uint8_t *data, size_t data_size, void(*callback)(volatile void *), void *context)
	Read a buffer from the flash chip in the background, with a callback called once done.
void	ice_sram_read_blocking (uint32_t addr, uint8_t *data, size_t data_size)
	Read a buffer from the flash chip and wait until completion.

Detailed Description

SRAM chip I/O.

The SRAM chip is APS6404L-3SQN.

Function Documentation

ice_sram_get_id()

void ice_sram_get_id

(

uint8_t

id[8]

)

Obtain the chip ID from the SRAM chip.

Parameters

id	Buffer to which the ID is written.

The format is:

• 8 bits - Manufacturer ID (MF ID) - 0x0D for AP Memory
• 8 bits - Known Good Die (KGD) - 0b01010101 if pass, 0b01011101 if fail
• 3 bits - Density EID - A code for memory size
• 45 bits - EID - the rest of the chip identifier

ice_sram_read_async()

void ice_sram_read_async	(	uint32_t	addr,
		uint8_t *	data,
		size_t	data_size,
		void(*)(volatile void *)	callback,
		void *	context
	)

Read a buffer from the flash chip in the background, with a callback called once done.

Parameters

addr	Address from which read the data.
data	Buffer to which save the data read.
data_size	Size of this buffer in bytes.
callback	Function called once the transfer is complete.
context	Argument passed to that function.

Calling this function when any SPI transfer is in progress on this bus waits for it then starts.

ice_sram_read_blocking()

void ice_sram_read_blocking	(	uint32_t	addr,
		uint8_t *	data,
		size_t	data_size
	)

Read a buffer from the flash chip and wait until completion.

Parameters

addr	Address from which read the data.
data	Buffer to which save the data read.
data_size	Size of this buffer in bytes.

ice_sram_write_async()

void ice_sram_write_async	(	uint32_t	addr,
		const uint8_t *	data,
		size_t	data_size,
		void(*)(volatile void *)	callback,
		void *	context
	)

Calling this function when any SPI transfer is in progress on this bus waits for it then starts.

Parameters

addr	Address to which write the data.
data	Buffer with the data to send.
data_size	Size of this buffer in bytes.
callback	Function called once the transfer is complete.
context	Argument passed to that function.

Calling this function when a transfer is in progress waits then starts.

ice_sram_write_blocking()

void ice_sram_write_blocking	(	uint32_t	addr,
		const uint8_t *	data,
		size_t	data_size
	)

Write a buffer to the flash chip and wait until completion.

Parameters

addr	Address to which write the data.
data	Buffer with the data to send.
data_size	Size of this buffer in bytes.