单片机课程设计-数字时钟

#include <AT89X52.h> #define DSbus P0 #define LCDbus P1 //定义DS12C887和LCD的控制线 sbit DS_CS = P2^7; //引脚13,片选信号输入,低电平有效。 sbit DS_AS = P2^4; //引脚14,地址选通输入。 sbit DS_RW = P2^5; //引脚15,读/写输入。 sbit DS_DS = P2^6; //引脚17,数据选通或读输入。 sbit LCD_RS=P2^0; sbit LCD_EN=P2^2; //时间变量定义 unsigned char Counter; unsigned char Hour,Min,Sec,Year,Month,Date,Week; /*DS12CR887驱动程序---------------------------------------------------------------------------*/ //往DS12CR887写数据函数 void DS12887write(unsigned char add,unsigned char Date) { DS_CS=0; DS_DS=1; DS_RW=1; DS_AS=1; DSbus=add; DS_AS=0; DS_RW=0; DSbus=Date; DS_RW=1; DS_AS=1; DS_CS=1; } //读取DS12CR887数据函数 unsigned char DS12887read(unsigned char add) { unsigned char z; DS_CS=0; DS_RW=1; DS_DS=1; DS_AS=1; DSbus=add; DS_AS=0; DS_DS=0; DSbus=0xff; z=DSbus; DS_DS=1; DS_AS=1; DS_CS=1; return z; } //DS12CR887初始化函数 void DS12887LCDinit() { DS_AS=0; DS_DS=0; DS_RW=0; DS12887write(0x0a,0x20);//DS12CR887寄存器A功能设置，开启时钟振荡器 DS12887write(0x0b,0x06);//寄存器B功能设置，不开启闹钟中断使能，数据模式为二进制，24小时模式。 //DS12887write(4,0x8);DS12887write(2,0x00);DS12887write(0,0x00); //给DS12CR887的时分秒赋值，开机后显示8:00:00 } void Delay(unsigned int z) { unsigned int x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void LCDwritecom(unsigned char com) { LCD_RS=0; LCDbus=com; Delay(5); LCD_EN=1; Delay(5); LCD_EN=0; } void LCDwritecomdata(unsigned char dat) { LCD_RS=1; LCDbus=dat; Delay(5); LCD_EN=1; Delay(5); LCD_EN=0; } void LCDinit() { LCD_EN=0; LCDwritecom(0x38); LCDwritecom(0x0c); LCDwritecom(0x06); LCDwritecom(0x01); LCDwritecom(0x80); } void Timedisplay(void) { //LCDwritecom(1); LCDwritecom(0x80); //往液晶屏填写"小时"数据----------------------------------------------- Hour=DS12887read(4); //读取DS12CR887的小时数据 if((Hour/10)==0)LCDwritecomdata(0); else LCDwritecomdata(Hour/10+0x30);//小时十位 LCDwritecomdata(Hour%10+0x30); //小时个位 LCDwritecomdata(':'); //时钟分隔符":" //往液晶屏填写"分钟"数据----------------------------------------------- Min=DS12887read(2); //读取DS12CR887的分数据 LCDwritecomdata(Min/10+0x30); LCDwritecomdata(Min%10+0x30); LCDwritecomdata(':'); //时钟分隔符":" //往液晶屏填写"秒"数据------------------------------------------------- Sec=DS12887read(0); //读取DS12CR887的秒数据 LCDwritecomdata(Sec/10+0x30); LCDwritecomdata(Sec%10+0x30); Delay(100); } void Datedisplay(void) { //LCDwritecom(1); LCDwritecom(0xc0); //往液晶屏填写"年"数据----------------------------------------------- LCDwritecomdata('2'); LCDwritecomdata('0'); Year=DS12887read(9); //读取DS12CR887的年数据 LCDwritecomdata(Year/10+0x30);//年十位 LCDwritecomdata(Year%10+0x30); //年个位 LCDwritecomdata('/'); //时钟分隔符":" //往液晶屏填写"月"数据----------------------------------------------- Month=DS12887read(8); //读取DS12CR887的月数据 LCDwritecomdata(Month/10+0x30); LCDwritecomdata(Month%10+0x30); LCDwritecomdata('/'); //时钟分隔符":" //往液晶屏填写"日"数据------------------------------------------------- Date=DS12887read(7); //读取DS12CR887的日数据 LCDwritecomdata(Date/10+0x30); LCDwritecomdata(Date%10+0x30); //往液晶屏填写"星期"数据------------------------------------------------- Week=DS12887read(6); //读取DS12CR887的日数据 LCDwritecomdata(0); LCDwritecomdata(Week-1+0x30); Delay(100); } void main() { // unsigned char i; LCDinit(); DS12887LCDinit(); DS12887write(0x0a,0x00); //开始调时，DS12CR887关闭时钟振荡器 DS12887write(0,55); //秒 DS12887write(2,59); DS12887write(4,23); DS12887write(6,5); //星期 DS12887write(7,22); //日 DS12887write(8,9); // DS12887write(9,12); // //display_Date(); while(1) { Timedisplay(); Datedisplay(); Delay(100); } }