Hi guys! If you are familiar with HAL Libraries , you Know that work with I2C_HAL Library is hard to handle.so for start, any Hardware developer recommend You to work with EEPROMs , so here we gone use I2C_HAL library and write somethings on EEPROMs (for example AT24 ) and then read that from. so here we are.first i wanna show you 2 function in my library that you can see below and then you can easily understand others.

its easy one,this is the base and don't afraid this is easy one . in this function we use HAL_I2C_Mem_Write and write our own function.This function handles Writing Array of Bytes on the specific Address . this program have this feature that don't force you to use absolute 16 bytes , you can use more than 16 bytes buffer.

Notes:

• hi2c: Pointer to a I2C_HandleTypeDef structure that contains the configuration information for the specified I2C.
• DevAddress: specifies the slave address to be programmed (EEPROM ADDRESS).
• MemAddress: Internal memory address (WHERE YOU WANNA WRITE TO).
• pData: Pointer to data buffer.
• TxBufferSize: Amount of data you wanna Write.
• we consider Timeout as 1000.

Function just get the DevAddress of the Slave (not master) and for the next step You know that the most of the EEPROM address start with 0xA0 .it get the MemAddress for the location you want to read data from.

Notes:

• hi2c: Pointer to a I2C_HandleTypeDef structure that contains the configuration information for the specified I2C.
• DevAddress: specifies the slave address to be programmed (EEPROM ADDRESS).
• MemAddress: Internal memory address (WHERE YOU WANNA READ FROM).
• pData: Pointer to data buffer.
• TxBufferSize: Amount of data you wanna Write.
• we consider Timeout as 1000.

here we are . we have 2 function for read and write and we can use it and expand our lib and make it better.

don't forget to visit our site .

thanks.

Sina Darvishi