ilambda/xc8-24xx1025

A 24xx1025 I²C EEPROM driver for XC8.

xc8-24xx1025

A 24xx1025 I²C EEPROM driver for XC8.

To use in a project, copy 24xx1025.h and 24xx1025.c in your project, and add :

#include "24xx1025.h"

⚠️IMPORTANT⚠️ You MUST redefine _XTAL_FREQ in 24xx1025.h for the library to work.

api

The following methods are available:

ee24xx1025_open

void ee24xx1025_open(uint32_t frequency);

Initialize the connection with the EEPROM.

• frequency : the frequency of the I²C clock, in Hz.

ee24xx1025_close

void ee24xx1025_close();

Closes the connection with the EEPROM.

ee24xx1025_currentaddress

void ee24xx1025_currentaddress();

Returns the value of the EEPROM address counter.

ee24xx1025_next

uint8_t ee24xx1025_next(uint8_t i2caddress, uint8_t block);

Returns the data pointed by the address counter. Once it is called, the address counter is incremented. If this call read address n, then next call will read address n+1.

• i2caddress : the I2C address of the EEPROM. Must be a OR combination of EE24XX1025_A0 and EE24XX1025_A1.
• block : the EEPROM block that will be read. Must be EE24XX1025_BLOCK0 or EE24XX1025_BLOCK1.

ee24xx1025_read

uint8_t ee24xx1025_read(uint8_t i2caddress, uint8_t block, uint16_t address);

Returns the data at the specified address.

• i2caddress : the I2C address of the EEPROM. Must be a OR combination of EE24XX1025_A0 and EE24XX1025_A1.
• block : the EEPROM block that will be read. Must be EE24XX1025_BLOCK0 or EE24XX1025_BLOCK1.
• address : the EEPROM address of the data. Must be inbetween 0000h and FFFFh.

ee24xx1025_readseq

void ee24xx1025_readseq(uint8_t i2caddress, uint8_t block, uint16_t address, uint8_t* out, uint16_t length);

Sequentially reads a given amount of data from the EEPROM.

• i2caddress : the I2C address of the EEPROM. Must be a OR combination of EE24XX1025_A0 and EE24XX1025_A1.
• block : the EEPROM block that will be read. Must be EE24XX1025_BLOCK0 or EE24XX1025_BLOCK1.
• address : the initial EEPROM address of the data. Must be inbetween 0000h and FFFFh.
• out : the pointer that will be filled with EEPROM data.
• length : the total length in bytes of the data that will be read.

ee24xx1025_write

void ee24xx1025_write(uint8_t i2caddress, uint8_t block, uint16_t address, uint8_t data);

Writes the data at the specified address.

• i2caddress : the I2C address of the EEPROM. Must be a OR combination of EE24XX1025_A0 and EE24XX1025_A1.
• block : the EEPROM block that will be modified. Must be EE24XX1025_BLOCK0 or EE24XX1025_BLOCK1.
• address : the EEPROM address of the data. Must be inbetween 0000h and FFFFh.
• data : the data that'll be written at address.

ee24xx1025_writepage

void ee24xx1025_writepage(uint8_t i2caddress, uint8_t block, uint16_t address, uint8_t* data, uint8_t length);

Writes up to 127 bytes of data at the same time in the EEPROM.

• i2caddress : the I2C address of the EEPROM. Must be a OR combination of EE24XX1025_A0 and EE24XX1025_A1.
• block : the EEPROM block that will be modified. Must be EE24XX1025_BLOCK0 or EE24XX1025_BLOCK1.
• address : the initial EEPROM address of the data. Must be inbetween 0000h and FFFFh.
• data : the array that will be copied into the EEPROM's memory.
• length : the total length in bytes of the data that will be written.