eeprom25AA256.h File Reference

Driver for the eeprom 225AA256 (and 25LC256) 256K SPI bus serial EEPROM from Microchip. More...

#include "std.h"
#include "mcu_periph/spi.h"

Include dependency graph for eeprom25AA256.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	Eeprom25AA256
	25AA256 eeprom structure More...

Macros
#define	E25_IN_BUFFER_LEN   (1024 + 3)
	Input buffer length.
#define	E25_OUT_BUFFER_LEN   3
	Output buffer length.

Functions
void	eeprom25AA256_init (struct Eeprom25AA256 *eeprom, struct spi_periph *spi_p, uint8_t slave_idx)
	Init function.
void	eeprom25AA256_read (struct Eeprom25AA256 *eeprom, uint16_t addr, uint16_t length)
	Read function.
void	eeprom25AA256_event (struct Eeprom25AA256 *eeprom)
	Event function.

Detailed Description

Driver for the eeprom 225AA256 (and 25LC256) 256K SPI bus serial EEPROM from Microchip.

Currently, only reading is implemented

Definition in file eeprom25AA256.h.

---

Data Structure Documentation

Eeprom25AA256

struct Eeprom25AA256

25AA256 eeprom structure

Definition at line 57 of file eeprom25AA256.h.

Collaboration diagram for Eeprom25AA256:

Data Fields
bool	data_available	data read flag
volatile uint8_t	rx_buf[E25_IN_BUFFER_LEN]	receive buffer
struct spi_periph *	spi_p	spi peripheral
struct spi_transaction	spi_trans	spi transaction
volatile uint8_t	tx_buf[E25_OUT_BUFFER_LEN]	transmit buffer

Macro Definition Documentation

E25_IN_BUFFER_LEN

#define E25_IN_BUFFER_LEN   (1024 + 3)

Input buffer length.

By default read 1024 bytes after the 3 empty bytes corresponding to the read command

Definition at line 43 of file eeprom25AA256.h.

E25_OUT_BUFFER_LEN

#define E25_OUT_BUFFER_LEN   3

Output buffer length.

For read only operation, we need 1 byte for read command and 2 bytes for 16-bit address

Definition at line 52 of file eeprom25AA256.h.

Function Documentation

eeprom25AA256_event()

void eeprom25AA256_event ( struct Eeprom25AA256 *  eeprom )

extern

Event function.

Parameters

[in]

eeprom

pointer to 25AA256 eeprom struture

Definition at line 89 of file eeprom25AA256.c.

References foo, SPITransDone, SPITransFailed, and SPITransSuccess.

Referenced by meteo_stick_event().

Here is the caller graph for this function:

eeprom25AA256_init()

void eeprom25AA256_init ( struct Eeprom25AA256 *  eeprom, struct spi_periph *  spi_p, uint8_t  slave_idx  )

extern

Init function.

Parameters

[in]	eeprom	pointer to 25AA256 eeprom struture
[in]	spi_p	pointer to spi device
[in]	slave_idx	SPI slive index

Definition at line 45 of file eeprom25AA256.c.

References foo, SPICphaEdge1, SPICpolIdleLow, SPIDiv128, SPIDss8bit, SPIMSBFirst, SPISelectUnselect, SPITransDone, and spi_periph::status.

Referenced by meteo_stick_init().

Here is the caller graph for this function:

eeprom25AA256_read()

void eeprom25AA256_read ( struct Eeprom25AA256 *  eeprom, uint16_t  addr, uint16_t  length  )

extern

Read function.

Parameters

[in]	eeprom	pointer to 25AA256 eeprom struture
[in]	addr	16-bit start read address
[in]	length	number of bytes to read

Definition at line 72 of file eeprom25AA256.c.

References E25_IN_BUFFER_LEN, E25_OUT_BUFFER_LEN, EEPROM_READ, foo, spi_submit(), and SPITransDone.

Referenced by meteo_stick_periodic().

Here is the call graph for this function:

Here is the caller graph for this function: