1、#include #include #include unsigned char code table= 0 xc0,0 xf9,0 xa4,0 xb0,0 x99,0 x92, 0 x82,0 xf8,0 x80,0 x90,0 x40; unsigned char sec; /定義計(jì)數(shù)值，每過1 秒，sec加1 unsigned int tcnt; /定時(shí)中斷次數(shù) bit write=0; /寫24C08 的標(biāo)志； sbit gewei=P25; /個(gè)位選通定義 sbit shiwei=P24; /十位選通定義 /24C08 讀寫驅(qū)動(dòng)程序/ sbit scl=P34; / 24c08 SC

2、L sbit sda=P35; / 24c08 SDA void delay1(unsigned char x) unsigned int i; for(i=0;ix;i+); ; void flash() ; ; void x24c08_init() /24c08 初始化子程序 scl=1; flash(); sda=1; flash(); void start() /啟動(dòng)（I方C）總線 sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash(); void stop() /停止（I方C）總線 sda=0; flash();

3、scl=1; flash(); sda=1; flash(); void writex(unsigned char j) /寫一個(gè)字節(jié) unsigned char i,temp; temp=j; for (i=0;i8;i+) temp=temp1; scl=0; flash(); sda=CY; flash(); scl=1; flash(); scl=0; flash(); sda=1; flash(); unsigned char readx() /讀一個(gè)字節(jié) unsigned char i,j,k=0; scl=0; flash(); sda=1; for (i=0;i8;i+) fl

4、ash(); scl=1; flash(); if (sda=1) j=1; else j=0; k=(k1)|j; scl=0; flash(); return(k); void clock() /(I方C）線時(shí)鐘 unsigned char i=0; scl=1; flash(); while (sda=1) scl=0; flash(); /從24c02 的地址address 中讀取一個(gè)字節(jié)數(shù)據(jù)/ unsigned char x24c08_read(unsigned char address) unsigned char i; start(); writex(0 xa0); clock(

5、); writex(address); clock(); start(); writex(0 xa1); clock(); i=readx(); stop(); delay1(10); return(i); /向24c02 的address 地址中寫入一字節(jié)數(shù)據(jù)info/ void x24c08_write(unsigned char address,unsigned char info) EA=0; start(); writex(0 xa0); clock(); writex(address); clock(); writex(info); clock(); stop(); EA=1; d

6、elay1(50); /24C08 讀寫驅(qū)動(dòng)程序完/ void Delay(unsigned int tc) /延時(shí)程序 while( tc != 0 ) unsigned int i; for(i=0; i100; i+); tc-; void LED() /LED顯示函數(shù) shiwei=0; P0=tablesec/10; Delay(8); shiwei=1; gewei=0; P0=tablesec%10; Delay(5); gewei=1; void t0(void) interrupt 1 using 0 /定時(shí)中斷服務(wù)函數(shù) TH0=(65536-50000)/256; /對(duì)TH

7、0 TL0 賦值 TL0=(65536-50000)%256; /重裝計(jì)數(shù)初值 tcnt+; /每過250ust tcnt 加一 if(tcnt=20) /計(jì)滿20次（1 秒）時(shí) tcnt=0; /重新再計(jì) sec+; write=1; /1 秒寫一次24C08 if(sec=100) /定時(shí)100 秒，在從零開始計(jì)時(shí) sec=0; void main(void) TMOD=0 x01; /定時(shí)器工作在方式1 ET0=1; EA=1; x24c08_init(); /初始化24C08 sec=x24c08_read(2);/讀出保存的數(shù)據(jù)賦于sec TH0=(65536-50000)/256; /對(duì)TH0 TL0 賦值 TL0=(65536-50000)%256; /使定時(shí)器0.05 秒中