EEPROM.rar_AT24C02计数

#include "reg52.h" #include "intrins.h" #define uchar unsigned char #define uint unsigned int sbit scl=P1^5; sbit sda=P3^6; uchar code table[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; uchar sec; uchar wr; void nop() { _nop_(); _nop_(); } void EEPROM_Init() { scl=1; nop(); sda=1; nop(); } void start() { scl=1; nop(); sda=1; nop(); sda=0; nop(); scl=0; nop(); } void stop() { scl=1; nop(); sda=0; nop(); sda=1; nop(); } void ack() { uchar i=0; scl=1; nop(); while((sda==1)&&(i<255)) { i++; } scl=0; nop(); } uchar readx() { uchar i,j,k=0; for(i=0;i<8;i++) { scl=0; nop(); if(sda==1) j=1; else j=0; k=(k<<1)|j; scl=1; nop(); } scl=0; nop(); return(k); } void writex(uchar dat) { uchar i; for(i=0;i<8;i++) { scl=0; nop(); sda=(bit)(dat&0x80); nop(); scl=1; nop(); dat<<=1; } scl=0; nop(); } void write(uchar add,uchar info) { start(); writex(0xa0); ack(); writex(add); ack(); writex(info); ack(); stop(); } uchar read(uchar add) { uchar i; start(); writex(0xa0); ack(); writex(add); ack(); start(); writex(0xa1); ack(); i=readx(); stop(); return(i); } void Delay_1ms(uchar i) { uchar x, j; for(j=0; j<i; j++) for(x=0; x<=110; x++); } void LED() //LED显示函数 { P2 = 6; P0 = table[sec / 10]; Delay_1ms(5); P2 = 7; P0 = table[sec % 10]; Delay_1ms(5); } void time0() interrupt 1 using 3 { static uchar count=0; TH0=0x4c; TL0=0x00; count++; if(count==20) { count=0; sec++; wr=1; if(sec==60) sec=0; } } void Time0_Init(void) { TMOD = 0x01; //定时器工作在方式1 ET0 = 1; EA = 1; TH0 = 0x4c; //对TH0 TL0赋值 TL0 = 0x00; //使定时器0.05秒中断一次 TR0 = 1; //开始计时 } void Main() { EEPROM_Init(); sec=read(0); LED(); Time0_Init(); while(1) { LED(); if(wr==1) { wr=0; write(0,sec); } } }