ds1302数码管显示.doc

DS1302应用刚学单片机，好多好奇，所以想做个简单的时钟。下面是PROTEUS仿真电路和电路图，简单易懂。文笔不好，说了多余。下面是程序。#include#include#include#define uint unsigned int#define uchar unsigned char#define BCDTUAN(str) (str/10*16+str%10) /定义宏，将要写入DS1302的时间转化为BCD码#define Write_Sec0x80#defineWrite_Min0x82#defineWrite_Hou0x84#defineWrite_Dat0x86#defineWrite_Mon0x88#defineWrite_day0x8a#defineWrite_Yea0x8c#defineWrite_WP0x8e/写保护位#define Write_TCR0x90#define Read_Sec0x81 #defineRead_Min0x83#defineRead_Hou0x85#defineRead_Dat0x87#defineRead_Mon0x89#defineRead_Day0x8b#defineRead_Yea0x8d#define CLK_BurstW0xbf/时钟突发模式写 #define CLK_BurstR0xbf/时钟突发模式读#define Write_RAM_Begin0xc0/RAM第一个字节写指令#define Read_RAM_Begin0xc1/RAM第一个字节读指令#define RAM_BurstW0xfe/突发模式写RAM#define RAM_BurstR0xff/突发模式读RAMsbit _74hc154_A = P10;sbit _74hc154_B = P11;sbit _74hc154_C = P12;sbit _74hc154_D = P13;sbit CE =P16;sbit SCLK=P15;sbit IO =P14; uchar code scan4=0,0,0,0,0,0,0,1,0,0,1,0,0,0,1,1, 0,1,0,0,0,1,0,1,0,1,1,0,0,1,1,1, 1,0,0,0,1,0,0,1,1,0,1,0,1,0,1,1, 1,1,0,0,1,1,0,1,1,1,1,0,1,1,1,1 ;uchar scanbuff=0,0,0,0,0,0,0,0,0,0,0,0;uchar code dispdate=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;void WriteDS1302(void);/向DS1302写入时间。void ReadDS1302(void);/读取DS1302中的年,月,日,星期几,小时,分钟和秒.void SendCmd(unsigned char cmd);/传送地址void delayus(unsigned char tt); void delay(uchar z) uchar x,y; for(x=z;x0;x-) for(y=120;y0;y-); void _74hc154(uchar k) /位扫描设定 _74hc154_A=scank0; _74hc154_B=scank1; _74hc154_C=scank2; _74hc154_D=scank3;void main() uchar i; while(1) WriteDS1302(); ReadDS1302() ;for(i=0;i12;i+) _74hc154(i); /位扫描 P0=dispdatescanbuffi;/数据送P0口 delay(10); void WriteDS1302(void)WriteByte(Write_Yea,BCDTUAN(13);/写13年/读取DS1302中的年,月,日,星期几,小时,分钟和秒.void ReadDS1302(void)unsigned char buff;/将读取的数据送入缓存数组，住输出数据为16进制buff=ReadByte(Read_Yea); /年scanbuff10=buff/16; /十位scanbuff11=buff%16; /个位buff=ReadByte(Read_Mon); /月scanbuff6=buff/16; /十位scanbuff7=buff%16; /个位buff=ReadByte(Read_Dat); /日scanbuff8=buff/16; /十位scanbuff9=buff%16; /个位buff=ReadByte(Read_Hou); /时scanbuff0=buff/16; /十位scanbuff1=buff%16; /个位buff=ReadByte(Read_Min); /分scanbuff2=buff/16; /十位scanbuff3=buff%16; /个位buff=ReadByte(Read_Sec); /秒scanbuff4=buff/16; /十位 scanbuff5=buff%16; /个位/读取地址RCmd的时间/数据unsigned char ReadByte(unsigned char RCmd)unsigned char valu=0x00,temp;CE=0;/初使化SCLK=0;/初使化，并为rise edge做准备CE=1;/初使化，传输开始。The SCLK must be low when CE is driven to high level.SendCmd(RCmd);/传送地址for(temp=0;temp=1;SCLK=0;if(IO=1)valu|=0x80; delayus(1);SCLK=1;delayus(1);CE=0; /结束传输return valu; /向WCmd地址写入时间/数据若写入时间，则时间用#define BCD(time) (time/10*16+time%10)处理.void WriteByte(unsigned char WCmd,unsigned char valu)unsigned char temp;CE=0;SCLK=0;/初使化，并为rise edge做准备CE=1;/初使化，传输开始。SendCmd(WCmd);for(temp=0;temp=1;CE=0;/结束传输 /突发模式读RAM num个字节void BurstRead_CLK(unsigned char *ptr)unsigned char temp,temp2,valu;CE=0;SCLK=0;CE=1;SendCmd(RAM_BurstR);/突发模式读取CLK开始for(temp2=0;temp28;temp2+)for(temp=0;temp=1;SCLK=0;if(IO=1)valu|=0x80; delayus(2);SCLK=1;delayus(2);*ptr=valu;ptr+;CE=0;/结束突发模式读void BurstRead_RAM(unsigned char *ptr,unsigned char num)unsigned char temp1,temp2,valu;CE=0;SCLK=0;CE=1;SendCmd(CLK_BurstR);/突发模式读取CLK开始for(temp2=0;temp2num;temp2+)for(temp1=0;temp1=1;SCLK=0;if(IO=1)valu|=0x80; delayus(2);SCLK=1;delayus(2);*ptr=valu;ptr+;CE=0;/结束突发模式读/突发模式写RAMvoid BurstWrite_RAM(unsigned char Data)unsigned char size=sizeof(Data),temp1,temp2,valu;if(size31)size=31;CE=0;SCLK=0;CE=1;SendCmd(RAM_BurstW);for(temp2=0;temp2size;temp2+)valu=Datatemp2;for(temp1=0;temp1=1;CE=0;void BurstWrite_CLK(unsigned char Time)unsigned char size=sizeof(Time),temp1,temp2,valu;if(size8)size=8;CE=0;SCLK=0;CE=1;SendCmd(CLK_BurstW);for(temp2=0;temp2size;temp2+)valu=Timetemp2;for(temp1=0;temp1=1;CE=0;/传送指令void SendCmd(unsigned char cmd)unsigned char temp;for(temp=0;temp=1;void delayus(unsigned char tt) /tt=2，延时为2ustt-;这个是ds1302.h头文件内容，建个txt文档将下面内容复制进去，改后缀为.h即可添加了#ifndef DS1302_H#define DS1302_Hextern unsigned char ReadByte(unsigned char RCmd);extern void WriteByte(unsigned char WCmd,unsigned char valu);ex