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在没用DS1302的时候，自己编的程序能正常显示，按键也可以随意调整，后来加了点DS1302的程序后就出现问题，LCD显示不正常，感觉秒钟是在走的，以下是程序，自己不太懂，想请各位帮帮忙，谢谢！！
#include #define uint unsigned int #define uchar unsigned char ***it LCD_RS = P2^6; ***it LCD_RW = P2^5; ***it LCD_EP = P2^7; ***it SCLK=P3^6; //时钟 ***it IO=P3^4; //数据 ***it RST = P3^5;// DS1302复位 uchar s1num,temp,day,year,mon,a,week,flag; char miao,shi,fen; uchar code table[]=" 20 - - "; uchar code table1[]=" : : "; uchar code ping[]={31,28,31,30,31,30,31,31,30,31,30,31}; uchar code run[]={31,29,31,30,31,30,31,31,30,31,30,31}; void delay(uchar z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } bit lcd_bz() { bit result; LCD_RS = 0; LCD_RW = 1; LCD_EP = 1; delay(5); result = (bit)(P0 & 0x80); //检测P0最高位是否为1 LCD_EP = 0; return result;//返回侧忙结果 } void write_com_8bit(uint com) { // 写入指令数据到LCD while(lcd_bz()); LCD_RS = 0; LCD_RW = 0; LCD_EP = 0; delay(1); P0 = com; //将高4位位指令通过P0口传给1602 delay(5); LCD_EP = 1; delay(5); LCD_EP = 0; } void write_com(uint com) //写命令函数 { while(lcd_bz()); LCD_RS = 0; LCD_RW = 0; LCD_EP = 0; delay(5); P0 = com; delay(5); LCD_EP = 1; delay(5); LCD_EP = 0; delay(5); P0 = (com&0x0f)<<4; delay(5); LCD_EP = 1; delay(5); LCD_EP = 0; } void write_data(uint date) //写数据函数 { while(lcd_bz()); LCD_RS = 1; LCD_RW = 0; LCD_EP = 0; delay(5); P0 =date; delay(5); LCD_EP = 1; delay(5); LCD_EP = 0; LCD_RS = 1; LCD_RW = 0; LCD_EP = 0; delay(5); P0 = (date&0x0f)<<4; delay(5); LCD_EP = 1; delay(5); LCD_EP = 0; } void write_byte(uchar date)//写一个字节 { SCLK=0; delay(1); for (a=0;a<8;a++) //循环8次 写入数据 { IO=date&0x01; delay(1); SCLK=1; delay(1); SCLK=0; date>>=1; //右移一位 } } void write_1302(uchar add,uchar date)//向1302芯片写函数，指定写入地址，数据 { RST=0; delay(1); SCLK=0; delay(1); RST=1; delay(1); write_byte(add); write_byte(date); SCLK=1; delay(1); RST=0; } uchar read_byte( ) { uchar date; delay(1);; for(a=0;a<8;a++) { date>>=1; if(IO==1) date|=0x80; SCLK=1; delay(1); SCLK=0; delay(1); } return date; } uchar read_1302(uchar add)//从1302读数据函数，指定读取数据来源地址 { uchar date; RST=0; delay(1); SCLK=0; delay(1); RST=1; delay(1); write_byte(add); date=read_byte(); SCLK=1; RST=0; return(date); } uchar BCD(uchar bcd)//BCD码转十进制函数，输入BCD，返回十进制 { return(((bcd&0xf0)>>4)*10+(bcd&0x0f)); } void init() //初始化函数 { //LCD1602初始化部分 uchar num,flag0; write_com_8bit(0x38); delay(1); write_com_8bit(0x38); delay(1); write_com_8bit(0x28); delay(1); write_com(0x28); delay(1); write_com(0x06); delay(1); write_com(0x0c); delay(1); write_com(0x01); delay(1); write_com(0x80); for(num=0;num<16;num++) { write_data(table[num]); delay(5); } write_com(0x80+0x40); for(num=0;num<12;num++) { write_data(table1[num]); delay(5); } //DS1302初始化部分 RST=0; SCLK=0; flag0=read_1302(0x81); if(flag0&0x80) //判断时钟芯片是否关闭 { write_1302(0x8e,0x00); //允许写，禁止写保护 write_1302(0x80,0x00); //向DS1302内写秒寄存器80H写入初始秒数据 write_1302(0x82,0x37);//向DS1302内写分寄存器82H写入初始分数据 write_1302(0x84,0x16);//向DS1302内写小时寄存器84H写入初始小时数据 write_1302(0x8a,0x01);//向DS1302内写周寄存器8aH写入初始周数据4 write_1302(0x86,0x29);//向DS1302内写日期寄存器86H写入初始日期数据 write_1302(0x88,0x07);//向DS1302内写月份寄存器88H写入初始月份数据 write_1302(0x8c,0x13);//向DS1302内写年份寄存器8cH写入初始年份数据 write_1302(0x90,0xa5); //充电 write_1302(0x8e,0x80); //打开写保护 } //定时器初始化 EA=1; EX0=1; IT0=1; } void write_sfm(uchar add,uchar shu) { uchar shi,ge; shi=shu/10; //分离操作 ge=shu%10; write_com(0x80+0x40+add); //地址指向 write_data(0x30+shi); write_data(0x30+ge); } void write_ymd(uchar add3,uchar shu3) { uchar shi,ge; shi=shu3/10; //分离操作 ge=shu3%10; write_com(0x80+add3); //地址指向 write_data(0x30+shi); write_data(0x30+ge); } void pingrun() { if((year%4==0&&year%100!=0)||(year%400==0)) flag=1; else flag=0; } void display_week(uchar week) { switch(week) { case 1:write_com(0x80+13);write_data('M');write_data('O');write_data('N');break; case 2:write_com(0x80+13);write_data('T');write_data('U');write_data('S');break; case 3:write_com(0x80+13);write_data('W');write_data('E');write_data('N');break; case 4:write_com(0x80+13);write_data('T');write_data('H');write_data('U');break; case 5:write_com(0x80+13);write_data('F');write_data('R');write_data('I');break; case 6:write_com(0x80+13);write_data('S');write_data('A');write_data('T');break; case 7:write_com(0x80+13);write_data('S');write_data('U');write_data('N');break; } } void DS_set_time() { write_1302(0x8e,0x00); write_1302(0x80,miao); write_1302(0x82,fen); write_1302(0x84,shi); write_1302(0x86,day); write_1302(0x88,mon); write_1302(0x8c,year); write_1302(0x8a,week); write_1302(0x8e,0x80); } void DS_gettime() { miao=BCD(read_1302(0x81)); fen=BCD(read_1302(0x83)); shi=BCD(read_1302(0x85)); year=BCD(read_1302(0x8d)); mon=BCD(read_1302(0x89)); day=BCD(read_1302(0x87)); week=BCD(read_1302(0x8b)); } void keyscan() { P1=0xfe; temp=P1; temp=temp&0xf0; while(temp!=0xf0) { delay(5); temp=P1; temp=temp&0xf0; while(temp!=0xf0) { temp=P1; if(temp==0xee) { delay(5); if(temp==0xee) { s1num++; while(temp!=0xf0) { temp=P1; temp=temp&0xf0; } } } if(s1num==1) { write_com(0x80+2); write_com(0x0f); } if(s1num==2) { write_com(0x80+7); } if(s1num==3) { write_com(0x80+10); } if(s1num==4) { write_com(0x80+0x40+10); } if(s1num==5) { write_com(0x80+0x40+7); } if(s1num==6) { write_com(0x80+0x40+4); } if(s1num==7) { s1num=0; write_com(0x0c); } if(s1num!=0) { if(temp==0xde) { delay(5); if(temp==0xde) { while(temp!=0xf0) { temp=P1; temp=temp&0xf0; } if(s1num==1) { year++; write_ymd(2,year); write_com(0x80+2); } if(s1num==2) { mon++; if(mon==13) mon=1; write_ymd(7,mon); write_com(0x80+7); } if(s1num==3) { day++; pingrun(); if(flag==1 && day>=(run[mon-1]+1)) day=1; if(flag==0 && day>=(ping[mon-1]+1)) day=1; write_ymd(10,day); write_com(0x80+10); display_week(week); } if(s1num==4) { miao++; if(miao==60) miao=0; write_sfm(10,miao); write_com(0x80+0x40+10); } if(s1num==5) { fen++; if(fen==60) fen=0; write_sfm(7,fen); write_com(0x80+0x40+7); } if(s1num==6) { shi++; if(shi==24) shi=0; write_sfm(4,shi); write_com(0x80+0x40+4); } } } if(temp==0xbe) { delay(5); if(temp==0xbe) { while(temp!=0xf0) { temp=P1; temp=temp&0xf0; } if(s1num==1) { year--; write_ymd(2,year); write_com(0x80+2); } if(s1num==2) { mon--; if(mon==0) mon=12; write_ymd(7,mon); write_com(0x80+7); } if(s1num==3) { day--; if(day==0 && flag==1) day=run[mon-1]; if(day==0 && flag==0) day=ping[mon-1]; write_ymd(10,day); write_com(0x80+10); display_week(week); } if(s1num==4) { miao--; if(miao==-1) miao=59; write_sfm(10,miao); write_com(0x80+0x40+10); } if(s1num==5) { fen--; if(fen==-1) fen=59; write_sfm(7,fen); write_com(0x80+0x40+7); } if(s1num==6) { shi--; if(shi==-1) shi=23; write_sfm(4,shi); write_com(0x80+0x40+4); } } } } } } } void main() { init(); DS_set_time(); while(1) { DS_gettime(); write_ymd(4,year); write_ymd(7,mon); write_ymd(10,day); display_week(week); write_sfm(4,shi); write_sfm(7,fen); write_sfm(10,miao); delay(5); keyscan(); } } void timer0() interrupt 1 { } 
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我给你上传你个我开发板上的例程、你可以按照原理图所示电路接一下，也可以改一下程序接口。测试下，因为程序太多检测起来有点麻烦。你首先得测试排除是硬件问题，再从程序下手，有时候虚焊等现象也会引起。一些问题。
1602LCD DS1302时钟实验.rar
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2013-12-26 21:30:22
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一般需要先排除硬件问题 然后在保证你驱动1302的协议没有逻辑错误 按照你所说的情况 有可能是1302驱动程序的逻辑错误 不过硬件问题 你要先排除 这是最根本的
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谢谢分享，十分感激 |
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2014-3-29 15:48:49
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楼主资源 ；；；
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