AT45 DataFlash

Defines
#define	AT45_PAGE_ADDR_MASK ((1 << 13) - 1)
	Mask for AT45 page address (13-bit).
#define	AT45_PAGE_POS_MASK ((1 << 11) - 1)
	Mask for AT45 page position (11-bit).
#define	AT45_ATMEL_JEDEC_ID 0x1f
	Atmel AT45 JEDEC ID.
#define	AT45_DATAFLASH_FAMILY_CODE 0x20
	DataFlash familty code.
#define	AT45_FAMILY_CODE_MASK 0xe0
	Mask for AT45 family code.
#define	AT45_DENSITY_CODE_MIN 2
	Minimum AT45 density code.
#define	AT45_DENSITY_CODE_MAX 8
	Maximum AT45 density code.
#define	AT45_DENSITY_CODE_MASK 0x1f
	Mask for AT45 density code.
#define	AT45_DENSITY_CODE_0_DEVICE_SIZE 0x8000L
	The device size in bytes for density code 0.
#define	AT45_PAGE_SIZE_ID_0_SIZE 256
	The page size in bytes for page size id 0.
Enumerations
enum	at45_cmd { AT45_CMD_CONTINOUS_ARRAY_READ = 0x0b, AT45_CMD_MAIN_MEMORY_TO_BUFFER_1_TRANSFER = 0x53, AT45_CMD_BUFFER_1_MAIN_MEMORY_PROGRAM_WITH_ERASE = 0x83, AT45_CMD_BUFFER_1_WRITE = 0x84, AT45_CMD_READ_ID = 0x9f, AT45_CMD_READ_STATUS_REG = 0xd7 }
	AT45 Commands. More...
enum	at45_status_bit { AT45_STATUS_PAGE_SIZE = 0, AT45_STATUS_PROTECT = 1, AT45_STATUS_COMP = 6, AT45_STATUS_RDY = 7 }
	AT45 status register bits. More...
Functions
static bool	at45_is_atmel_jedec_id (uint8_t manuf_id)
	Test if AT45 mamufacturer ID is Atmel's.
static bool	at45_is_dataflash_family_code (uint8_t device_id1)
	Test if AT45 device ID is DataFlash family.
static uint8_t	at45_get_density_code (uint8_t device_id1)
	Get AT45 density code from Device ID 1.
static bool	at45_is_valid_density_code (uint8_t device_id1)
	Test if AT45 device ID have a valid density code.
static bool	at45_is_valid_id (uint8_t manuf_id, uint8_t device_id1)
	Test if AT45 device ID is DataFlash family.
static uint32_t	at45_get_size (uint8_t device_id1)
	Get AT45 device size from Device ID 1.
static uint32_t	at45_get_page_size (uint8_t device_id1)
	Get AT45 device page size from Device ID 1.
Variables
static const uint8_t	at45_density_table []
	AT45 density code to device size information translation table.
AT45 segmentation defines
This can be used to build up a singel byte of information containing information on page size, sector size and device size.
#define	AT45_PS_256 (0 << 0)
	Page size 256 bytes.
#define	AT45_PS_512 (1 << 0)
	Page size 512 bytes.
#define	AT45_PS_1024 (2 << 0)
	Page size 1024 bytes.
#define	AT45_PS_MASK (7 << 0)
	Page size mask bits.
#define	AT45_SS_128P (0 << 3)
	Sector size 128 pages.
#define	AT45_SS_256P (1 << 3)
	Sector size 256 bytes.
#define	AT45_SS_MASK (3 << 3)
	Sector size mask bits.
#define	AT45_DS_4S (0 << 4)
	Device size 4 sectors.
#define	AT45_DS_8S (1 << 4)
	Device size 8 sectors.
#define	AT45_DS_16S (2 << 4)
	Device size 16 sectors.
#define	AT45_DS_32S (3 << 4)
	Device size 32 sectors.
#define	AT45_DS_64S (4 << 4)
	Device size 64 sectors.
#define	AT45_DS_MASK (7 << 4)
AT45 devices size information bitmask
Associates AT45 device type to a bitmask with size information
#define	AT45DB011D (AT45_PS_256 \| AT45_SS_128P \| AT45_DS_4S)
	Size definitions for AT45DB011D.
#define	AT45DB021D (AT45_PS_256 \| AT45_SS_128P \| AT45_DS_8S)
	Size definitions for AT45DB021D.
#define	AT45DB041D (AT45_PS_256 \| AT45_SS_256P \| AT45_DS_8S)
	Size definitions for AT45DB031D.
#define	AT45DB081D (AT45_PS_256 \| AT45_SS_256P \| AT45_DS_16S)
	Size definitions for AT45DB081D.
#define	AT45DB161D (AT45_PS_512 \| AT45_SS_256P \| AT45_DS_16S)
	Size definitions for AT45DB161D.
#define	AT45DB321D (AT45_PS_512 \| AT45_SS_128P \| AT45_DS_64S)
	Size definitions for AT45DB321D.
#define	AT45DB642D (AT45_PS_1024 \| AT45_SS_256P \| AT45_DS_32S)
	Size definitions for AT45DB641D.

Detailed Description

The following types of DataFlash are supported:

DB011D(2): 256 + 8 B/page, 8 pages/block, 128 pages/sector, 4 sectors
DB021D(3): 256 + 8 B/page, 8 pages/block, 128 pages/sector, 8 sectors
DB041D(4): 256 + 8 B/page, 8 pages/block, 256 pages/sector, 8 sectors
DB081D(5): 256 + 8 B/page, 8 pages/block, 256 pages/sector, 16 sectors
DB161D(6): 512 + 16 B/page, 8 pages/block, 256 pages/sector, 16 sectors
DB321D(7): 512 + 16 B/page, 8 pages/block, 128 pages/sector, 64 sectors
DB642D(8): 1024 + 32 B/page, 8 pages/block, 256 pages/sector, 32 sectors

Define Documentation

#define AT45_ATMEL_JEDEC_ID 0x1f

Atmel AT45 JEDEC ID.

Definition at line 134 of file at45.h.

Referenced by at45_is_atmel_jedec_id().

#define AT45_DATAFLASH_FAMILY_CODE 0x20

DataFlash familty code.

Definition at line 137 of file at45.h.

Referenced by at45_is_dataflash_family_code().

#define AT45_DENSITY_CODE_0_DEVICE_SIZE 0x8000L

The device size in bytes for density code 0.

Not a known density code, but usefull for calculation since for every step up in density code doubles the deviedc size. So it can be used as a base to be shifted.

Definition at line 158 of file at45.h.

Referenced by at45_get_size().

#define AT45_DENSITY_CODE_MASK 0x1f

Mask for AT45 density code.

Definition at line 149 of file at45.h.

Referenced by at45_get_density_code().

#define AT45_DENSITY_CODE_MAX 8

Maximum AT45 density code.

Definition at line 146 of file at45.h.

Referenced by at45_is_valid_density_code().

#define AT45_DENSITY_CODE_MIN 2

Minimum AT45 density code.

Definition at line 143 of file at45.h.

Referenced by at45_is_valid_density_code().

#define AT45_DS_16S (2 << 4)

Device size 16 sectors.

Definition at line 74 of file at45.h.

#define AT45_DS_32S (3 << 4)

Device size 32 sectors.

Definition at line 75 of file at45.h.

#define AT45_DS_4S (0 << 4)

Device size 4 sectors.

Definition at line 72 of file at45.h.

#define AT45_DS_64S (4 << 4)

Device size 64 sectors.

Definition at line 76 of file at45.h.

#define AT45_DS_8S (1 << 4)

Device size 8 sectors.

Definition at line 73 of file at45.h.

#define AT45_DS_MASK (7 << 4)

Device size mask bits

Definition at line 77 of file at45.h.

#define AT45_FAMILY_CODE_MASK 0xe0

Mask for AT45 family code.

Definition at line 140 of file at45.h.

Referenced by at45_is_dataflash_family_code().

#define AT45_PAGE_ADDR_MASK ((1 << 13) - 1)

Mask for AT45 page address (13-bit).

Definition at line 128 of file at45.h.

Referenced by at45_cmd_buffer_1_main_memory_program_with_erase(), at45_cmd_cont_array_read(), and at45_cmd_main_memory_to_buffer_1_transfer().

#define AT45_PAGE_POS_MASK ((1 << 11) - 1)

Mask for AT45 page position (11-bit).

Definition at line 131 of file at45.h.

Referenced by at45_cmd_buffer_1_write(), and at45_cmd_cont_array_read().

#define AT45_PAGE_SIZE_ID_0_SIZE 256

The page size in bytes for page size id 0.

Definition at line 161 of file at45.h.

Referenced by at45_get_page_size().

#define AT45_PS_1024 (2 << 0)

Page size 1024 bytes.

Definition at line 67 of file at45.h.

#define AT45_PS_256 (0 << 0)

Page size 256 bytes.

Definition at line 65 of file at45.h.

#define AT45_PS_512 (1 << 0)

Page size 512 bytes.

Definition at line 66 of file at45.h.

#define AT45_PS_MASK (7 << 0)

Page size mask bits.

Definition at line 68 of file at45.h.

Referenced by at45_get_page_size().

#define AT45_SS_128P (0 << 3)

Sector size 128 pages.

Definition at line 69 of file at45.h.

#define AT45_SS_256P (1 << 3)

Sector size 256 bytes.

Definition at line 70 of file at45.h.

#define AT45_SS_MASK (3 << 3)

Sector size mask bits.

Definition at line 71 of file at45.h.

#define AT45DB011D (AT45_PS_256 | AT45_SS_128P | AT45_DS_4S)

Size definitions for AT45DB011D.

Definition at line 88 of file at45.h.

#define AT45DB021D (AT45_PS_256 | AT45_SS_128P | AT45_DS_8S)

Size definitions for AT45DB021D.

Definition at line 90 of file at45.h.

#define AT45DB041D (AT45_PS_256 | AT45_SS_256P | AT45_DS_8S)

Size definitions for AT45DB031D.

Definition at line 92 of file at45.h.

#define AT45DB081D (AT45_PS_256 | AT45_SS_256P | AT45_DS_16S)

Size definitions for AT45DB081D.

Definition at line 94 of file at45.h.

#define AT45DB161D (AT45_PS_512 | AT45_SS_256P | AT45_DS_16S)

Size definitions for AT45DB161D.

Definition at line 96 of file at45.h.

#define AT45DB321D (AT45_PS_512 | AT45_SS_128P | AT45_DS_64S)

Size definitions for AT45DB321D.

Definition at line 98 of file at45.h.

#define AT45DB642D (AT45_PS_1024 | AT45_SS_256P | AT45_DS_32S)

Size definitions for AT45DB641D.

Definition at line 100 of file at45.h.

Enumeration Type Documentation

enum at45_cmd

AT45 Commands.

Enumerator:

AT45_CMD_CONTINOUS_ARRAY_READ	Read continous data.
AT45_CMD_MAIN_MEMORY_TO_BUFFER_1_TRANSFER	Transfer from flash to buffer 1.
AT45_CMD_BUFFER_1_MAIN_MEMORY_PROGRAM_WITH_ERASE	Program buffer 1 into flash with built-in erase.
AT45_CMD_BUFFER_1_WRITE	Write to buffer 1.
AT45_CMD_READ_ID	Read manufacturer and device ID.
AT45_CMD_READ_STATUS_REG	Read status register.

Definition at line 104 of file at45.h.

enum at45_status_bit

AT45 status register bits.

Enumerator:

AT45_STATUS_PAGE_SIZE	Page size (1: power-of-2 size).
AT45_STATUS_PROTECT	Sector protection.
AT45_STATUS_COMP	Result of compare operation.
AT45_STATUS_RDY	Ready for next command.

Definition at line 120 of file at45.h.

Function Documentation

static uint8_t at45_get_density_code ( uint8_t device_id1 ) [inline, static]

Get AT45 density code from Device ID 1.

Parameters:

device_id1

Device ID part 1

Returns:: Density code

Definition at line 210 of file at45.h.

References AT45_DENSITY_CODE_MASK.

Referenced by at45_get_page_size(), at45_get_size(), and at45_is_valid_density_code().

static uint32_t at45_get_page_size ( uint8_t device_id1 ) [inline, static]

Get AT45 device page size from Device ID 1.

Parameters:

device_id1

Device ID part 1

Returns:: Page size

Definition at line 264 of file at45.h.

References at45_density_table, at45_get_density_code(), AT45_PAGE_SIZE_ID_0_SIZE, and AT45_PS_MASK.

static uint32_t at45_get_size ( uint8_t device_id1 ) [inline, static]

Get AT45 device size from Device ID 1.

Parameters:

device_id1

Device ID part 1

Returns:: Size of device

Definition at line 251 of file at45.h.

References AT45_DENSITY_CODE_0_DEVICE_SIZE, and at45_get_density_code().

static bool at45_is_atmel_jedec_id ( uint8_t manuf_id ) [inline, static]

Test if AT45 mamufacturer ID is Atmel's.

Parameters:

manuf_id

Manufacturer ID

Return values:

	true	Is equal
	false	Is different

Definition at line 186 of file at45.h.

References AT45_ATMEL_JEDEC_ID.

Referenced by at45_is_valid_id().

static bool at45_is_dataflash_family_code ( uint8_t device_id1 ) [inline, static]

Test if AT45 device ID is DataFlash family.

Parameters:

device_id1

Device ID part 1

Return values:

	true	Is equal
	false	Is different

Definition at line 198 of file at45.h.

References AT45_DATAFLASH_FAMILY_CODE, and AT45_FAMILY_CODE_MASK.

Referenced by at45_is_valid_id().

static bool at45_is_valid_density_code ( uint8_t device_id1 ) [inline, static]

Test if AT45 device ID have a valid density code.

Parameters:

device_id1

Device ID part 1

Return values:

	true	Is equal
	false	Is different

Definition at line 222 of file at45.h.

References AT45_DENSITY_CODE_MAX, AT45_DENSITY_CODE_MIN, and at45_get_density_code().

Referenced by at45_is_valid_id().

static bool at45_is_valid_id	(	uint8_t	manuf_id,
		uint8_t	device_id1
	)			`[inline, static]`

Test if AT45 device ID is DataFlash family.

Parameters:

	manuf_id	Manufacturer ID
	device_id1	Device ID part 1

Return values:

	true	Is equal
	false	Is different

Definition at line 238 of file at45.h.

References at45_is_atmel_jedec_id(), at45_is_dataflash_family_code(), and at45_is_valid_density_code().

Variable Documentation

const uint8_t at45_density_table[] [static]

Initial value:

 {
        [2] = AT45DB011D,
        [3] = AT45DB021D,
        [4] = AT45DB041D,
        [5] = AT45DB081D,
        [6] = AT45DB161D,
        [7] = AT45DB321D,
        [8] = AT45DB642D,
}

AT45 density code to device size information translation table.

The device density code indicates a specific device, and this table translates from this to the device size information value.

Definition at line 169 of file at45.h.

Referenced by at45_get_page_size().

AT45 DataFlash

Defines

Enumerations

Functions

Variables

AT45 segmentation defines

AT45 devices size information bitmask

Detailed Description

Define Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation