程序设计

新建AT24C02文件夹

添加at24c02.c

#include "at24c02.h"

//在指定地址，写入数据。addr是指定24c02写入的位置，pData为数组，num为写入的位数。
void AT24C02_Write(uint8_t addr,uint8_t *pData,uint8_t num)
{
	for(int i=0 ;i<num;i++)
	{
		if(HAL_I2C_Mem_Write(&hi2c1,ADDR_AT24C02_Write,addr+i,I2C_MEMADD_SIZE_8BIT,pData+i,1,1000)==HAL_OK)
		{
			HAL_Delay(5);
		}
	}
}

void AT24C02_Read(uint8_t addr,uint8_t *pData,uint8_t num)
{
	HAL_I2C_Mem_Read(&hi2c1,ADDR_AT24C02_Read,addr,I2C_MEMADD_SIZE_8BIT,pData,num,1000);
}

添加at24c02.h

#include "i2c.h"

#define ADDR_AT24C02_Write 0xA0
#define ADDR_AT24C02_Read 0xA1
#define ADDR_24_BufferSize 256

extern uint8_t  ReadBuffer[ADDR_24_BufferSize];

void AT24C02_Write(uint8_t addr,uint8_t *pData,uint8_t num);
void AT24C02_Read(uint8_t addr,uint8_t *pData,uint8_t num);

测试

在主函数中定义

uint8_t Writebuff[4]={1,2,3,4};
uint8_t Readbuff[4]={0,0,0,0};

在主函数中调用

printf("写入数据为：%d%d%d%d\r\n",Writebuff[0],Writebuff[1],Writebuff[2],Writebuff[3]);
AT24C02_Write(0,Writebuff,4);
AT24C02_Read(0,Readbuff,4);
printf("读出数据为：%d%d%d%d\r\n",Readbuff[0],Readbuff[1],Readbuff[2],Readbuff[3]);