#include
#include//我的自定義LCD1602頭文件

/*---------------------------------------------------------------
24C32可存儲4K（1024*4）個字節(jié)（8bit），因此尋址地址最大為0x0FFF，24C32為從機。
----------------------------------------------------------------*/

#defineWriteDeviceAddress0x0A2//定義器件在I2C總線中的寫地址（注意：根據(jù)自定義從機地址接口改變）
#defineReadDviceAddress0x0A3//定義器件在I2C總線中的讀地址（注意：根據(jù)自定義從機地址接口改變）

sbitSCL=P0^4;//我的24C32接口設置
sbitSDA=P3^7;

//2us延時子程序
voiddelay_2us(uchari)
{
while(--i);
}

//開始總線
voidStart()
{
SDA=1;
SCL=1;
delay_2us(1);
SDA=0;
delay_2us(1);
SCL=0;
}
//結束總線
voidStop()
{
SDA=0;
SCL=1;
delay_2us(1);
SDA=1;
delay_2us(1);
SDA=0;
SCL=0;
}
//發(fā)送應答位信號
//voidMACK()
//{
//SDA=0;
//SCL=1;
//delay_2us(1);
//SCL=0;
//SDA=1;
//}

//發(fā)送非應答位信號
voidMNACK()
{
SDA=1;
SCL=1;
delay_2us(1);
SCL=0;
SDA=0;
}
//檢測從機應答信號
bitCACK()
{
bitflag;
SDA=1;
SCL=1;
delay_2us(1);
flag=SDA;
SCL=0;
return(flag);
}
/*--------------------------------------------------------------------------
//寫入8個bit到24C32
---------------------------------------------------------------------------*/
Write8Bit(ucharinput)
{
uchartemp;
for(temp=0;temp<8;temp++)
{
SDA=(bit)(input&0x80);
SCL=1;
delay_2us(1);
SCL=0;
input=input<<1;
}
}
/*--------------------------------------------------------------------------
//寫入一個字節(jié)到24C32中
---------------------------------------------------------------------------*/

voidWrite24C32(ucharch,uintaddress)
{
Start();
Write8Bit(WriteDeviceAddress);
while(CACK());
Write8Bit(address/256);（注意：地址分兩次傳送，高位在前?。?br />while(CACK());
Write8Bit(address%256);
while(CACK());
Write8Bit(ch);
while(CACK());
Stop();
}
/*--------------------------------------------------------------------------
//從24C32中讀出8個bit
---------------------------------------------------------------------------*/
ucharRead8Bit()
{
unsignedchartemp,rbyte=0;
for(temp=0;temp<8;temp++)
{
SDA=1;
SCL=1;
rbyte=rbyte|((unsignedchar)(SDA));
if(temp<7)//注意：僅左移7次
{
rbyte=rbyte<<1;
}
SCL=0;
}
return(rbyte);
}

/*--------------------------------------------------------------------------
從24c32中讀出1個字節(jié)
---------------------------------------------------------------------------*/
ucharRead24C32(uintaddress)
{
ucharch;
Start();
Write8Bit(WriteDeviceAddress);
while(CACK());
Write8Bit(address/256);
while(CACK());
Write8Bit(address%256);
while(CACK());
Start();
Write8Bit(ReadDviceAddress);
while(CACK());
ch=Read8Bit();
MNACK();
Stop();
return(ch);
}
/*--------------------------------------------------------------------------
主函數(shù)
---------------------------------------------------------------------------*/
voidmain(void)//主程序
{
ucharnewchar;

LCD1602_init();//1602初始化

Write24C32('8',0x01FF);//寫'5'進0x1FF

LCD1602_puts(0,0,"24C32W_TestOK!");

newchar=Read24C32(0x01FF);//從0x1FF接收數(shù)據(jù)

LCD1602_puts(0,1,"ReadValue=");

LCD1602_puts(10,1,newchar);

while(1);

}