STM32 CubeMX HAL库M24C02 EEPROM操作

1、说明

（1）MCU为STM32F103C8，EEPROM型号M24C02；（2）硬件连接：EEPROM连接STM32的IIC1；（3）EEPROM的E0,E1,E2,WC脚连接地，因此其设备地址为：(0x50<<1)，即0xA0; （4）程序中使用HAL库，代码有CubeMX生成；

2、程序

驱动头文件：m24_eeprom.h

\#ifndef __M24_EEPROM_H_
#define __M24_EEPROM_H_

#include "stdbool.h"
#include "string.h"

#include "main.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"

HAL_StatusTypeDef EEPROM_ReadByte(uint16_t MemAddress,uint8_t *data);
HAL_StatusTypeDef EEPROM_WriteByte(uint16_t MemAddress,uint8_t data);

HAL_StatusTypeDef EEPROM_ReadMultipleBytes(uint16_t MemAddress, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef EEPROM_WriteMultipleBytes(uint16_t MemAddress, uint8_t *pData, uint16_t Size);

#endif

驱动主文件：m24_eeprom.c

#include "m24_eeprom.h"
#include "i2c.h"

#define M24C02_ADDR        (0x50<<1)

//eeprom read n bytes
HAL_StatusTypeDef EEPROM_ReadMultipleBytes(uint16_t MemAddress, uint8_t *pData, uint16_t Size)
{
    if (HAL_I2C_Mem_Read(&hi2c1, M24C02_ADDR0x01, MemAddress, I2C_MEMADD_SIZE_8BIT, pData, Size, 1000) == HAL_OK)
    {
        return HAL_OK;
    }
    else
    {
        return HAL_ERROR;
    }
}

//eeprom write n bytes
HAL_StatusTypeDef EEPROM_WriteMultipleBytes(uint16_t MemAddress, uint8_t *pData, uint16_t Size)
{
    for(int i=0; i<Size; i++){
        if(EEPROM_WriteByte(MemAddress+i, pData[i]) != HAL_OK){
            return HAL_ERROR;
        }
    }
}

//EEPROM read
HAL_StatusTypeDef EEPROM_ReadByte(uint16_t MemAddress,uint8_t *data)
{
    if (HAL_I2C_Mem_Read(&hi2c1, M24C02_ADDR0x01, MemAddress, I2C_MEMADD_SIZE_8BIT, data, 1, 1000) == HAL_OK)
    {
        return HAL_OK;
    }
    else
    {
        return HAL_ERROR;
    }
}

//EEPROM write byte
HAL_StatusTypeDef EEPROM_WriteByte(uint16_t MemAddress,uint8_t data)
{
    if (HAL_I2C_Mem_Write(&hi2c1, M24C02_ADDR, MemAddress, I2C_MEMADD_SIZE_8BIT,&data,1, 1000) == HAL_OK)
    {
        //write cycle :5ms
        HAL_Delay(5);
        return HAL_OK;
    }
    else
    {
        return HAL_ERROR;
    }
}

在main主文件进行调用：

初始化

1	sht30_init();

写EEPROM

uint8_t wdata[4] = {2,5,6,8};
if( EEPROM_WriteMultipleBytes(1,wdata, 4) != HAL_OK){
    SEGGER_RTT_printf(0, "EEPROM write error\r\n");
}else{
    SEGGER_RTT_printf(0, "EEPROM write ok\r\n");
}

再读取回来

uint8_t rbuff[4];
    SEGGER_RTT_printf(0, "EEPROM READ bytes:");
    EEPROM_ReadMultipleBytes(1, rbuff, 4);
    for(int x=0; x<4; x++){
        SEGGER_RTT_printf(0, " %d", rbuff[x]);
    }
    SEGGER_RTT_printf(0, "\r\n");