#include <REGX52.H>
#include "I2C.h"

#define AT24C02_address 0xA0

/**
  * @brief发送一帧数据
  * @param word_address为要往哪个字地址发送数据，dat为要发送的数据
  * @retval无
  */
void AT24C02_SendData(unsigned char word_address,unsigned char dat)
{
	unsigned char ack;
	I2C_Start();
	I2C_SendByte(AT24C02_address);
	ack = I2C_ReceiveAck();
	I2C_SendByte(word_address);
	I2C_ReceiveAck();
	I2C_SendByte(dat);
	I2C_ReceiveAck();
	I2C_Stop();
}

/**
  * @brief接收一帧数据
  * @param word_address为从哪个地址接收数据
  * @retval返回接收到的一个字节数据
  */
unsigned char AT24C02_ReceiveData(unsigned char word_address)
{
	unsigned char rec,ack;
	I2C_Start();
	I2C_SendByte(AT24C02_address);
	ack = I2C_ReceiveAck();
	I2C_SendByte(word_address);
	I2C_ReceiveAck();
	I2C_Start();
	I2C_SendByte(AT24C02_address|0x01);
	I2C_ReceiveAck();
	rec = I2C_ReceiveByte();
	I2C_SendAck(1);
	I2C_Stop();
	return rec;
}