#include <reg51.h>
#ifndef false
#define false 0
#endif
#ifndef true
#define true 1
#endif
#define WriteDeviceAddress 0xa0
#define ReadDviceAddress 0xa1
sbit SDA = P3 ^ 5; //根據(jù)實際連接的管腳定義
sbit SCL = P3 ^ 4;
sbit led = P1^0;
sbit led2 = P1^1;
unsigned char code Num[21]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,
0x90,0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,
0x10,0x89};
unsigned char code Disdigit[4] = {0x7F,0xBF,0xDF,0xEF};
unsigned char Disbuf[4];
unsigned char code write_data[5] = { 5,2,5,1,8 };
unsigned char read_data[5];
//--------------------------------------------------------------------------
void Delayus(unsigned int number)
{
for(;number!=0;number--)
{
}
}
//--------------------------------------------------------------------------
void DelayMs(unsigned int number)
{
unsigned char temp;
for(;number!=0;number--)
{
for(temp=112;temp!=0;temp--)
{
}
}
}
//--------------------------------------------------------------------------
void Start()
{
SDA=1;
Delayus(4);
SCL=1;
Delayus(4);
SDA=0;
Delayus(4);
SCL=0;
Delayus(4);
}
//--------------------------------------------------------------------------
void Stop()
{
SCL=0;
Delayus(4);
SDA=0;
Delayus(4);
SCL=1;
Delayus(4);
SDA=1;
Delayus(4);
}
//--------------------------------------------------------------------------
void Ack()
{
SDA=0;
Delayus(4);
SCL=1;
Delayus(4);
SCL=0;
Delayus(4);
SDA=1;
Delayus(4);
}
//--------------------------------------------------------------------------
void NoAck()
{
SDA=1;
Delayus(4);
SCL=1;
Delayus(4);
SCL=0;
Delayus(4);
SDA=0; //
}
//--------------------------------------------------------------------------
bit TestAck()
{
bit ErrorBit;
SDA=1;
Delayus(4);
SCL=1;
Delayus(4);
ErrorBit=SDA;
Delayus(4);
SCL=0;
return(ErrorBit);
}
//--------------------------------------------------------------------------
void Write8Bit(unsigned char input)
{
unsigned char temp;
for(temp=8;temp!=0;temp--)
{
SDA=(bit)(input&0x80);
Delayus(4);
SCL=1;
Delayus(4);
SCL=0;
Delayus(4);
input=input<<1;
}
}
//--------------------------------------------------------------------------
unsigned char Read8Bit()
{
unsigned char temp,rbyte=0;
for(temp=8;temp!=0;temp--)
{
SCL=1;
Delayus(4);
rbyte=rbyte<<1;
rbyte=rbyte|((unsigned char)(SDA));
SCL=0;
}
return(rbyte);
}
void Write24c02(unsigned char *Wdata,unsigned char RomAddress,unsigned char number)
{
Start();
Write8Bit(WriteDeviceAddress);
TestAck();
Write8Bit(RomAddress);
TestAck();
for(;number!=0;number--)
{
Write8Bit(*Wdata);
TestAck();
Wdata++;
}
Stop();
DelayMs(10);
}
void Read24c02(unsigned char *RamAddress,unsigned char RomAddress,unsigned char bytes)
{
Start();
Write8Bit(WriteDeviceAddress);
TestAck();
Write8Bit(RomAddress);
TestAck();
Start();
Write8Bit(ReadDviceAddress);
TestAck();
while(bytes!=1)
{
*RamAddress=Read8Bit();
Ack();
RamAddress++;
bytes--;
}
*RamAddress=Read8Bit();
NoAck();
Stop();
}
void Display(void) //顯示
{
unsigned int i = 0;
unsigned int temp,count;
temp = Disdigit[count];
P2 =temp;
temp = Disbuf[count];
temp = Num[temp];
P0 =temp;
count++;
if (count==4)
count=0;
}
void time1() interrupt 3 using 2
{
Display();
TH1 = (65535 - 2000)/256;
TL1 = (65535 - 2000)%256;
}
void main()
{
TMOD = 0x15;
TR1 = 1;
EA = 1;
ET1 = 1;
Write24c02(write_data,0x00,3);
DelayMs(200);
Read24c02(read_data,0x00,4);
while(1)
{
Disbuf[0] = read_data[0];
Disbuf[1] = read_data[1];
Disbuf[2] = read_data[2];
Disbuf[3] = read_data[3];
}
}
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66821730(技術(shù)支持)
