单片机课程设计报告带温度显示的电子钟

1、一、 方案该作品是个性化电子钟设计，技术上主要用单片机（at89c51）主控，16脚的液晶显示，有ds1302芯片制作电子时钟，用ds18b20芯片来完成温度的测控。二、电路特色 此次设计的带温度显示的电子钟，具有万年历（调节），整点报时，闹钟，蜂鸣器播放音乐（生日快乐歌）等功能。三、流程图四、程序#include #include /#include lcd1602.h/#include ds1302.h#define uint unsigned int#define uchar unsigned charsbit ds1302_clk = p17; /实时时钟时钟线引脚sbit ds130

2、2_io = p16; /实时时钟数据线引脚sbit ds1302_rst = p15; /实时时钟复位线引脚sbit beep=p34;sbit acc0 = acc0;sbit acc7 = acc7;char hide_sec,hide_min,hide_hour,hide_day,hide_week,hide_month,hide_year,hide_m,hide_f,hide_h;sbit set = p20; /模式切换键sbit up = p21; /加法按钮sbit down = p22; /减法按钮sbit out = p23; /立刻跳出调整模式按钮sbit dq = p1

3、0; /温度传送数据io口sbit dd=p24;char done,count,temp,flag,up_flag,down_flag,key;uchar temp_value; /温度值uchar m,f,h,mo,d,y,w,kaiguan,h=12,f=30;uchar tempbuffer5,week_value2,nao8;void naotime();uchar code tone=212,212,190,212,159,169,212,212,190,212,142,159,212,212,106,126,159,169,190,119,119,126,159,142,159,

4、0;uchar code lon=9,3,12,12,12,24,9,3,12,12,12,24,9,3,12,12,12,12,12,9,3,12,12,12,24,0;void delay(uint z)uint x,y;for(x=z;x0;x-)for(y=110;y0;y-);void music()uint i,j,k=0,m;for(m=0;m26;m+)for(i=0;ilonk*20;i+)beep=beep;for(j=0;j0; i-)ds1302_io = acc0; /相当于汇编中的 rrcds1302_clk = 1;ds1302_clk = 0;acc = acc

5、 1;unsigned char ds1302outputbyte(void) /实时时钟读取一字节(内部函数)unsigned char i;for(i=8; i0; i-)acc = acc 1; /相当于汇编中的 rrcacc7 = ds1302_io;ds1302_clk = 1;ds1302_clk = 0;return(acc);void write1302(unsigned char ucaddr, unsigned char ucda)/ucaddr: ds1302地址, ucdata: 要写的数据ds1302_rst = 0;ds1302_clk = 0;ds1302_rst

6、 = 1;ds1302inputbyte(ucaddr); / 地址，命令ds1302inputbyte(ucda); / 写1byte数据ds1302_clk = 1;ds1302_rst = 0;unsigned char read1302(unsigned char ucaddr)/读取ds1302某地址的数据unsigned char ucdata;ds1302_rst = 0;ds1302_clk = 0;ds1302_rst = 1;ds1302inputbyte(ucaddr|0x01); / 地址，命令ucdata = ds1302outputbyte(); / 读1byte数

7、据ds1302_clk = 1;ds1302_rst = 0;return(ucdata);void ds1302_gettime(systemtime *time) /获取时钟芯片的时钟数据到自定义的结构型数组unsigned char readvalue;readvalue = read1302(ds1302_second);time-second = (readvalue&0x70)4)*10 + (readvalue&0x0f);readvalue = read1302(ds1302_minute);time-minute = (readvalue&0x70)4)*10 + (read

8、value&0x0f);readvalue = read1302(ds1302_hour);time-hour = (readvalue&0x70)4)*10 + (readvalue&0x0f);readvalue = read1302(ds1302_day);time-day = (readvalue&0x70)4)*10 + (readvalue&0x0f);readvalue = read1302(ds1302_week);time-week = (readvalue&0x70)4)*10 + (readvalue&0x0f);readvalue = read1302(ds1302_m

9、onth);time-month = (readvalue&0x70)4)*10 + (readvalue&0x0f);readvalue = read1302(ds1302_year);time-year = (readvalue&0x70)4)*10 + (readvalue&0x0f);void datetostr(systemtime *time) /将时间年,月,日,星期数据转换成液晶显示字符串,放到数组里datestring if(hide_year2) /这里的if,else语句都是判断位闪烁,2就不显示,输出字符串为 2007/07/22time-datestring0 = 2

10、;time-datestring1 = 0;time-datestring2 = time-year/10 + 0;time-datestring3 = time-year%10 + 0;elsetime-datestring0 = ;time-datestring1 = ;time-datestring2 = ;time-datestring3 = ;time-datestring4 = /;if(hide_monthdatestring5 = time-month/10 + 0;time-datestring6 = time-month%10 + 0;elsetime-datestring

11、5 = ;time-datestring6 = ;time-datestring7 = /;if(hide_daydatestring8 = time-day/10 + 0;time-datestring9 = time-day%10 + 0;time-datestring10 = ;time-datestring11 = ;elsetime-datestring8 = ;time-datestring9 = ;time-datestring10 = ;time-datestring11 = ;if(hide_weekweek%10 + 0; /星期的数据另外放到 week_value数组里,

12、跟年,月,日的分开存放,因为等一下要在最后显示elseweek_value0 = ;week_value1 = 0;time-datestring10 = 0; /字符串末尾加 0 ,判断结束字符void timetostr(systemtime *time) /将时,分,秒数据转换成液晶显示字符放到数组 timestring;if(hide_hourtimestring0 = time-hour/10 + 0;time-timestring1 = time-hour%10 + 0;elsetime-timestring0 = ;time-timestring1 = ;time-timestr

13、ing2 = :;if(hide_mintimestring3 = time-minute/10 + 0;time-timestring4 = time-minute%10 + 0;elsetime-timestring3 = ;time-timestring4 = ;time-timestring5 = :;if(hide_sectimestring6 = time-second/10 + 0;time-timestring7 = time-second%10 + 0;time-timestring8 = ;elsetime-timestring6 = ;time-timestring7 =

14、 ;time-timestring8 = ;time-datestring9 = 0;void baoshi(systemtime *time)if(time-hourhour8&time-minute/10=0&time-minute%10=0&time-second/10=0&time-second%10=0)music();void naozhong(systemtime *time) if(time-minute%10=(f%10)&time-minute/10=(f/10)&time-hour%10=(h%10)&time-hour/10=(h/10)&time-second%10=

15、(m%10)&time-second/10=(m/10) music();void initial_ds1302(void) /时钟芯片初始化unsigned char second=read1302(ds1302_second);if(second&0x80) /判断时钟芯片是否关闭write1302(0x8e,0x00); /写入允许write1302(0x8c,0x07); /以下写入初始化时间 日期:07/07/25.星期: 3. 时间: 23:59:55write1302(0x88,0x07);write1302(0x86,0x25);write1302(0x8a,0x07);wri

16、te1302(0x84,0x23);write1302(0x82,0x59);write1302(0x80,0x55);write1302(0x8e,0x80); /禁止写入/*ds18b20子程序*/*ds18b20延迟子函数（晶振12mhz ）*/void delay_18b20(unsigned int i)while(i-);/*ds18b20初始化函数*/void init_ds18b20(void)unsigned char x=0;dq = 1; /dq复位delay_18b20(8); /稍做延时dq = 0; /单片机将dq拉低delay_18b20(80); /精确延时 大

17、于 480usdq = 1; /拉高总线delay_18b20(14);x=dq; /稍做延时后 如果x=0则初始化成功 x=1则初始化失败delay_18b20(20);/*ds18b20读一个字节*/unsigned char readonechar(void)uchar i=0;uchar dat = 0;for (i=8;i0;i-)dq = 0; / 给脉冲信号dat=1;dq = 1; / 给脉冲信号if(dq)dat|=0x80;delay_18b20(4);return(dat);/*ds18b20写一个字节*/void writeonechar(uchar dat)unsig

18、ned char i=0;for (i=8; i0; i-)dq = 0;dq = dat&0x01;delay_18b20(5);dq = 1;dat=1;/*读取ds18b20当前温度*/void readtemp(void)unsigned char a=0;unsigned char b=0;unsigned char t=0;init_ds18b20();writeonechar(0xcc); / 跳过读序号列号的操作writeonechar(0x44); / 启动温度转换delay_18b20(100); / this message is wery importantinit_d

19、s18b20();writeonechar(0xcc); /跳过读序号列号的操作writeonechar(0xbe); /读取温度寄存器等（共可读9个寄存器） 前两个就是温度delay_18b20(100);a=readonechar(); /读取温度值低位b=readonechar(); /读取温度值高位temp_value=b4;void temp_to_str() /温度数据转换成液晶字符显示tempbuffer0=temp_value/10+0; /十位tempbuffer1=temp_value%10+0; /个位tempbuffer2=0xdf; /温度符号tempbuffer3=

20、c;tempbuffer4=0;void naoz() if(hide_h2) nao0=h/10+0; nao1=h%10+0;elsenao0= ; nao1= ; nao2=:;if(hide_f2) nao3=f/10+0; nao4=f%10+0;elsenao3= ;nao4= ; nao5=:;if(hide_m2) nao6=m/10+0; nao7=m%10+0;else nao6= ; nao7= ; nao8=0;void delay1ms(unsigned int count)unsigned int i,j;for(i=0;icount;i+)for(j=0;j0;d

21、elay-)for(i=0;i0x59) /超过59秒,清零temp=0;break;case 2:temp=read1302(ds1302_minute); /读取分数temp=temp+1; /分数加1up_flag=1;if(temp=0)music();delay(2);if(temp0x59) /超过59分,清零temp=0;break;case 3:temp=read1302(ds1302_hour); /读取小时数temp=temp+1; /小时数加1up_flag=1;if(temp0x23) /超过23小时,清零temp=0;break;case 4:temp=read130

22、2(ds1302_week); /读取星期数temp=temp+1; /星期数加1up_flag=1;if(temp0x7)temp=1;break;case 5:temp=read1302(ds1302_day); /读取日数temp=temp+1; /日数加1up_flag=1;if(temp0x31)temp=1;break;case 6:temp=read1302(ds1302_month); /读取月数temp=temp+1; /月数加1up_flag=1;if(temp0x12)temp=1;break;case 7:temp=read1302(ds1302_year); /读取年

23、数temp=temp+1; /年数加1up_flag=1;if(temp0x85)temp=0;break;default:break;while(up=0);void upkey1()/升序按键up=1;if(up=0)mdelay(8);switch(count)case 1:m=m+1; /秒数加1up_flag=1; /数据调整后更新标志if(m59) /超过59秒,清零m=0;break;case 2:f=f+1; /分数加1up_flag=1;if(f59) /超过59分,清零f=0;break;case 3:h=h+1; /小时数加1up_flag=1;if(h23) /超过23

24、小时,清零h=0;break;default:break;while(up=0);/ void downkey()/降序按键down=1;if(down=0)mdelay(8);switch(count)case 1:temp=read1302(ds1302_second); /读取秒数temp=temp-1; /秒数减1down_flag=1; /数据调整后更新标志if(temp=0x7f) /小于0秒,返回59秒temp=0x59;break;case 2:temp=read1302(ds1302_minute); /读取分数temp=temp-1; /分数减1down_flag=1;if

25、(temp=-1)temp=0x59; /小于0秒,返回59秒break;case 3:temp=read1302(ds1302_hour); /读取小时数temp=temp-1; /小时数减1down_flag=1;if(temp=-1)temp=0x23;break;case 4:temp=read1302(ds1302_week); /读取星期数temp=temp-1; /星期数减1down_flag=1;if(temp=0)temp=0x7;break;case 5:temp=read1302(ds1302_day); /读取日数temp=temp-1; /日数减1down_flag=

26、1;if(temp=0)temp=31;break;case 6:temp=read1302(ds1302_month); /读取月数temp=temp-1; /月数减1down_flag=1;if(temp=0)temp=12;break;case 7:temp=read1302(ds1302_year); /读取年数temp=temp-1; /年数减1down_flag=1;if(temp=-1)temp=0x85;break;default:break;while(down=0);void downkey1()/降序按键down=1;if(down=0)mdelay(8);switch(

27、count)case 1:m=m-1; /秒数减1down_flag=1; /数据调整后更新标志if(m=0) /小于0秒,返回59秒m=59;break;case 2:f=f-1; /分数减1down_flag=1;if(f=-1)f=59; /小于0秒,返回59秒break;case 3:h=h-1; /小时数减1down_flag=1;if(h=-1)h=23;break;default:break;while(down=0);void setkey()/模式选择按键set=1;if(set=0)mdelay(8);count=count+1; /setkey按一次,count就加1do

28、ne=1; /进入调整模式while(set=0);void setkey1()dd=1;if(dd=0)mdelay(8);kaiguan=1; /naotime();count=count+1; /setkey按一次,count就加1key=1; /进入调整模式while(dd=0);void keydone()/按键功能执行 uchar second;if(flag=0) /关闭时钟,停止计时 write1302(0x8e,0x00); /写入允许temp=read1302(0x80);write1302(0x80,temp|0x80);write1302(0x8e,0x80); /禁止

29、写入flag=1;setkey(); /扫描模式切换按键switch(count)case 1:do /count=1,调整秒outkey(); /扫描跳出按钮upkey(); /扫描加按钮downkey(); /扫描减按钮if(up_flag=1|down_flag=1) /数据更新，重新写入新的数据write1302(0x8e,0x00); /写入允许write1302(0x80,temp|0x80); /写入新的秒数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_sec+; /位闪计数if(hide_sec3)hide_sec=

30、0;show_time(); /液晶显示数据while(count=2);break;case 2:do /count=2,调整分hide_sec=0;outkey();upkey();downkey();if(temp0x60)temp=0;if(up_flag=1|down_flag=1)write1302(0x8e,0x00); /写入允许write1302(0x82,temp); /写入新的分数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_min+;if(hide_min3)hide_min=0;show_time();wh

31、ile(count=3);break;case 3:do /count=3,调整小时hide_min=0;outkey();upkey();downkey();if(up_flag=1|down_flag=1)write1302(0x8e,0x00); /写入允许write1302(0x84,temp); /写入新的小时数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_hour+;if(hide_hour3)hide_hour=0;show_time();while(count=4);break;case 4:do /count=4,

32、调整星期hide_hour=0;outkey();upkey();downkey();if(up_flag=1|down_flag=1)write1302(0x8e,0x00); /写入允许write1302(0x8a,temp); /写入新的星期数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_week+;if(hide_week3)hide_week=0;show_time();while(count=5);break;case 5:do /count=5,调整日hide_week=0;outkey();upkey();downk

33、ey();if(up_flag=1|down_flag=1)write1302(0x8e,0x00); /写入允许write1302(0x86,temp); /写入新的日数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_day+;if(hide_day3)hide_day=0;show_time();while(count=6);break;case 6:do /count=6,调整月hide_day=0;outkey();upkey();downkey();if(up_flag=1|down_flag=1)write1302(0x8

34、e,0x00); /写入允许write1302(0x88,temp); /写入新的月数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_month+;if(hide_month3)hide_month=0;show_time();while(count=7);break;case 7:do /count=7,调整年hide_month=0;outkey();upkey();downkey();if(up_flag=1|down_flag=1)write1302(0x8e,0x00); /写入允许write1302(0x8c,temp);

35、 /写入新的年数write1302(0x8e,0x80); /禁止写入up_flag=0;down_flag=0;hide_year+;if(hide_year3)hide_year=0;show_time();while(count=8);break;case 8: count=0;hide_year=0; /count8, 跳出调整模式,返回默认显示状态second=read1302(ds1302_second);write1302(0x8e,0x00); /写入允许write1302(0x80,second&0x7f);write1302(0x8e,0x80); /禁止写入done=0;break; /count=7,开启中断,标志位置0并退出default:break;void keydone1()/按键功能执行 uchar second;setkey1(); /扫描模式切换按键switch(count)case 1:do /count=1,调整秒outkey1(); /扫描跳出按钮upkey1(); /扫描加按钮downkey1(); /扫描减按钮hide_m+; /位闪计数if(hide_m3)hide_m=0;naotime(); /