EEPROM DRIVER

EEPROM driver reusable in different platforms. Supports all I2C speed modes.

Supported Hardware

• NUCLEO-L552ZE-Q
• NUCLEO-H745ZI-Q
• NUCLEO-U575ZI-Q

Functions Guide

• eeprom_initialize: initializes the eeprom_t instance and adds it in the eeprom_t eeprom_interface array.
• eeprom_deinitialize: deinitializes the eeprom_t instance.
• eeprom_read: reads the data from the eeprom starting from a given address and saves it in the specified buffer. The amount of data to be sent must be specified.
• eeprom_available: checks wether the eeprom is free or not.
• eeprom_wait_sync: puts the eeprom in timeout.
• eeprom_write: writes the data contained in a specified buffer on the eeprom starting from a given address. The amount of data to be sent must be specified.
• eeprom_clear_all: writes 0x00 in the whole EEPROM.

How to use

• Set the I2C peripheral in the .ioc file

• Include the header file drv_eeprom.h

• Define an eeprom_t handler and initialize/assign properly the structure:

  • instance.handler: I2C handler of choice.
  • instance.mx_init : I2C initializing function generated by the configuration tool.
  • instance.dev_addr : address of the EEPROM.
  • instance.pg_sz: Page size in bytes.
  • instance.mem_sz: EEPROM memory size.
  • mem_addr_sz : Number of bytes of the address

• Use the function:

  • eeprom_initialize: to initialize the EEPROM.
  • eeprom_read: to read data from the EEPROM.
  • eeprom_write: to write data on the EEPROM.

Example

This example uses the NUCLEO-L552ZE-Q with the X-NUCLEO-EEPRMA2 board extension.

eeprom_t eeprom_u1 = {

                .mx_init = MX_I2C1_Init,
                .handler = &hi2c1,
                .pg_sz = 16,
                .dev_addr = 0xA8,
		.mem_addr_sz = 2,
                .mem_sz = 2024
};

eeprom_initialize(&eeprom_u1)

memmove(eeprom_read_buffer, rw_buffer, 20);

eeprom_write(&eeprom_u1, 0x000A, eeprom_read_buffer, 20);

memset(eeprom_read_buffer,0, 100);

eeprom_read(&eeprom_u1, 0x0000, eeprom_read_buffer, 20);