at24c02.c

#include "at24c02.h"
#include "I2C.h"

#include <REGX52.H>

#define AT24C02_ADDRESS 0xA0

/**
 * @brief  AT24C02写入一个字节
 * @param  WordAddress 要写入字节的地址
 * @param  Data 要写入的数据
 * @retval 无
 */
void AT24C02_WriteByte(unsigned char WordAddress, Data)
{
    I2C_Start();
    I2C_SendByte(AT24C02_ADDRESS);
    I2C_ReceiveAck();
    I2C_SendByte(WordAddress);
    I2C_ReceiveAck();
    I2C_SendByte(Data);
    I2C_ReceiveAck();
    I2C_Stop();
}

/**
 * @brief  AT24C02读取一个字节
 * @param  WordAddress 要读出字节的地址
 * @retval 读出的数据
 */
unsigned char AT24C02_ReadByte(unsigned char WordAddress)
{
    unsigned char Data;
    I2C_Start();
    I2C_SendByte(AT24C02_ADDRESS);
    I2C_ReceiveAck();
    I2C_SendByte(WordAddress);
    I2C_ReceiveAck();
    I2C_Start();
    I2C_SendByte(AT24C02_ADDRESS | 0x01);
    I2C_ReceiveAck();
    Data = I2C_ReceiveByte();
    I2C_SendAck(1);
    I2C_Stop();
    return Data;
}