电子万年历毕业设计(基于AT89C51单片机和DS1302时钟芯片)

dat=1; else dat=0; clk=1;

temp=(temp>>1); clk=0; }

temp=dat1; for(t=0;t<8;t++) {

if((temp&0x01)==1)//0000 0001 dat=1; else dat=0; clk=1; temp=temp>>1; clk=0; }

rst=0; }

uchar ds1302_read(char comm) {

char temp,t; rst=0; clk=0; rst=1; temp=comm; for(t=0;t<8;t++) {

if(temp&0x01) dat=1; else dat=0;

clk=1;temp=temp>>1; clk=0;}

temp=0;//00000000 for(t=0;t<8;t++) {

temp=temp>>1; if(dat==1) temp=temp|0x80; else temp=temp&0x7f; clk=1; clk=0; } rst=0;

return temp; }

//Ds1302.c//

//Key.c//

#include #define char signed char #define uint unsigned int sbit mode=P1^4; sbit add=P1^5; sbit sub=P1^6; char mod=0;

extern void delay(uint ms); extern char shi,fen,nian,yue,ri; extern char baojingshi,baojingfen; extern char ds1302_read(char); extern void ds1302_write(char,char);

void key() {

shi=ds1302_read(0x85);