在MX中开启PB6,PB7 

读函数

uint8_t eeprom_read(uint8_t addr)
{
    I2CStart();
    I2CSendByte(0xa0);
    I2CWaitAck();
	
    I2CSendByte(addr);
    I2CWaitAck();
   
	I2CStart();
	I2CSendByte(0xa1);
	I2CWaitAck();
	
    data=I2CReceiveByte();
	I2CSendNotAck();
    I2CStop();
	
	return data;
}

写函数

void eeprom_write(uint8_t addr,uint8_t data)
{
    I2CStart();
    I2CSendByte(0xa0);
    I2CWaitAck();
	
    I2CSendByte(addr);
    I2CWaitAck();
	
    I2CSendByte(data);
	I2CWaitAck();
	
    I2CStop();
	HAL_Delay(20);
}

定义

  uint8_t data;

 写入值后被读取

   I2CInit(); 
   eeprom_write(1,50);
   HAL_Delay(20);
   data = eeprom_read(1);