pico-eeprom-i2c

A Library to Write and Read I2C EEPROMs with Raspberry Pi Pico C/C++ SDK. Kept as simple as possible.

Usage

1. Integrate this to your project by copy or as git submodule.
2. Set "Page Size"(BYTES_PER_PAGE) and "Memory Size"(MAX_SIZE_BYTES) in eeprom.h.
3. See examples and description below.

Functions

• eeprom_write_multi(i2c_inst_t *i2c, uint8_t addr, uint16_t reg, uint8_t *src, uint16_t len)

  @brief write multi byte to eeprom
  @details auto increment register address over pages
  @param i2c i2c bus
  @param addr 7bit address of eeprom
  @param reg specify register to start writing at
  @param src data to be written
  @param len number of bytes to be written
  @return uint16_t if success return number of bytes written, if fails return PICO_ERROR_GENERIC

• eeprom_write_single(i2c_inst_t *i2c, uint8_t addr, uint16_t reg, uint8_t *src)

  @brief write single byte to eeprom
  @param i2c i2c bus
  @param addr 7bit address of eeprom
  @param reg register address of eeprom, specify address to be write in
  @param src data to be written @return int8_t if success return 1, if fails return PICO_ERROR_GENERIC

• eeprom_read(i2c_inst_t *i2c, uint8_t addr, uint16_t reg, uint8_t *dst, uint16_t len)

  @brief read single or multi bytes to eeprom
  @param i2c i2c bus
  @param addr 7bit address of eeprom
  @param reg specify register to start reading at
  @param dst buffer to store read bytes in
  @param len number of bytes to read
  @return uint16_t if success return number of bytes read, if fails return PICO_ERROR_GENERIC

License

BSD 3-Clause