三款单片机应用实例

1、三款单片机应用实例例1：一个液晶显示的数字式电脑温度计液晶显示器分很多种类，按显示方式可分为段式，行点阵式和全点阵式。段式与数码管类似，行点阵式一般是英文字符，全点阵式可显示任何信息， 如汉字、图形、图表等。这里我们介绍一种八段式四位LCD显示器，该显示器内置驱动器，串行数据传送，使用非常方便。原理图如下图：下图是长沙太阳人科技开发有限公司生产的4位带串行接口的液晶显示模块SMS0403的外部引线简图： 有关该模块的具体参数，请查看该公司网站。此例中使用的温度传感器为美国DALLAS公司生产的单总线式数字温度传感器。该传感器本站有其详细的资料可供下载。此例稍加改动，即可做成温控器。 例2:LE

2、D显示电脑电子钟 本例介绍一种用LED制作的电脑电子钟（电脑万年历）。其制作完成装潢后的照片如下图： 上图中，年、月、日及时间选用的是1.2寸共阳数码管，星期选用的是2.3寸数码管，温度选用的是0.5寸数码管，也可根据个人的爱好选用不同规格的数码管。原理图如下图所示： 上图中，CPU选用的是AT89C2051,时钟芯片选用的是Dallas公司的DS1302, 温度传感器选用的是Dallas公司的数字温度传感器DS1820，显示驱动芯片选用的是德州仪器公司的TPIC6B595,也可选用与其兼容的芯片NC595或国产的AMT9595。整个电子钟用两个键来调节时间和日期。一个是位选键，一个是数字调节

3、键。按一下位选键，头两位数字开始闪动，进入设定调节状态，此时按数字调节键，当前闪动位的数字就可改变。全部参数调节完后，五秒钟内没有任何键按下，则数字停止闪动，退出设定调节状态。源程序清单如下(无温度显示程序）： start:do;$include(reg51.dcl)declare (sclk,io,rst) bit at (0b3h) register; /* p33,p34,p35 */declare (command,data,n,temp1,num) byte;declare a(9) byte;declare ab(6) byte;declare aco(11) byte const

4、ant (0fdh,60h,0dah,0f2h,66h,0b6h,0beh,0e0h,0feh,0f6h,00h);declare week(11) byte constant (0edh,028h,0dch,7ch,39h,75h,0f5h,2ch,0fdh,7dh,00h);declare da literally p15,clk literally p16,ale literally p17, mk literally p11,sk literally p12;clear:procedure; sclk=0;io=0;rst=0;end clear;send1302:procedure(

5、comm);declare (i,comm) byte;do i=0 to 7;comm=scr(comm,1);io=cy;call time(1);sclk=0;call time(1);sclk=1;end;end send1302;wbyt1:procedure(com,dat);/*字节写过程*/declare (com,dat) byte;call clear;rst=1;call send1302(com);call send1302(dat);call clear;end wbyt1;wbyt8:procedure;/*时钟多字节突发模式写过程*/declare j byte;

6、call clear;a(7)=A(6);a(6)=a(0);rst=1;call send1302(command);do j=1 to 8; call send1302(a(j);end;call clear;end wbyt8;RBYT1:PROCEDURE; DECLARE I BYTE;CALL CLEAR;RST=1; call send1302(0c1h); IO=1; DO I=0 TO 7;SCLK=1;SCLK=0;CY=IO;N=SCR(N,1); END; A(8)=N; CALL CLEAR;END RBYT1;send595:procedure; declare k

7、 byte;do k=0 to 7; data=scr(data,1); da=cy; clk=1; clk=0;end;end send595;send595_1:procedure; declare k byte;do k=0 to 7; data=scr(data,1); da1=cy; clk1=1; clk1=0;end;end send595_1;rb1:procedure(abc,j);DECLARE (I,j,abc) BYTE;CALL CLEAR;RST=1; call send1302(abc); IO=1; DO I=0 TO 7;SCLK=1;SCLK=0;CY=IO

8、;N=SCR(N,1); END; ab(j)=N; ab(j)=dec(ab(j); CALL CLEAR;end rb1;rbyt6:procedure; call rb1(0f1h,0); call rb1(0f3h,1); call rb1(0f5h,2); call rb1(0f7h,3); call rb1(0f9h,4); call rb1(0fbh,5); call rb1(0fdh,6);end rbyt6;wbyt6:procedure; call wbyt1(8eh,0);/* write enable */ call wbyt1(0f0h,ab(0); call wby

9、t1(0f2h,ab(1); call wbyt1(0f4h,ab(2); call wbyt1(0f6h,ab(3); call wbyt1(0f8h,ab(4); call wbyt1(0fah,ab(5); call wbyt1(0fch,ab(6); call wbyt1(8eh,80h);/* write disable */end wbyt6;rbyt8:procedure;/*时钟多字节突发模式读过程*/declare (i,j) byte;call clear;rst=1;call send1302(command); io=1;do j=1 to 8; do i=0 to 7

10、;sclk=1;call time(1);sclk=0; cy=io;n=scr(n,1);end;a(j)=n;end;call clear;a(0)=a(6);a(6)=A(7);a(0)=a(0) and 0fh;if a(0)6 then a(0)=0;CALL RBYT1; if (a(1)=0 and a(2)=0 and a(3)=0) thendo; do num=0 to 35;call time(250); end; temp1=1;end;if temp1=1 then do;temp1=0;ab(4)=ab(4)+1; if ab(4)99h then do; ab(4

11、)=0; ab(5)=ab(5)+1; if ab(5)99h then ab(5)=0;end;call wbyt6; end;end rbyt8;display:procedure;/*jieya,yima,fasong*/declare (i,n,m) byte; n=a(0) and 0fh; /* send week */ data=week(n); call send595; n=a(4);/* send date */ n=n and 0fh; data=aco(n); call send595; n=a(4); n=shr(n,4); data=aco(n); call sen

12、d595; do i=1 to 3; /* send second,minute,hour */ n=a(i); n=n and 0fh; data=aco(n); call send595; n=a(i); n=shr(n,4); data=aco(n); call send595;end; do i=5 to 6; /* send month,year */ n=a(i); n=n and 0fh; data=aco(n); call send595; n=a(i); n=shr(n,4); data=aco(n); call send595;end; n=a(8); /*send 19

13、or 20 */ n=n and 0fh; data=aco(n); call send595; n=a(8); n=shr(n,4); data=aco(n); call send595;do m=0 to 5; n=ab(m); n=n and 0fh; data=aco(n); call send595_1; n=ab(m); n=shr(n,4); data=aco(n); call send595_1;end; ale=0; ale=1;end display;beginset:procedure; a(0)=06h;a(1)=58h;a(2)=59h;a(3)=23h; a(4)=

14、30h;a(5)=06h;a(6)=97h;a(7)=00; a(8)=19h; /* set date/time (1997,7,1,8:00:00,week 3) */ call wbyt1(8eh,0); /* write enable*/ call wbyt1(80h,00h);/* start colock */ call wbyt1(0beh,0abh);/*两个二极管与8K电阻串联充电*/ command=0beh;/* write colock/date */ call wbyt8; call wbyt1(0c0h,a(8); call wbyt1(8eh,80h);/* se

15、t write protect bit */end beginset;key:procedure; declare (i,time1,k1,tem) byte; call time(100); k1=7;time1=30; if mk=0 then do; do while time10;week: if k1=0 thendo;do i=0 to 5;/*call hz(a(0);*/end;do i=0 to 3;/*call hz0;*/end; end;tem=a(k1); if k1=7 then tem=a(8); a(k1)=0aah;if k1=7 then a(8)=0aah

16、;call display;call time(254);call time (254);a(k1)=tem;if k1=7 then a(8)=tem;call display;call time(254);call time(254);call time(254);time1=time1-1; if mk=0 then do;call time(100); /*MOD KEY PROCESS*/ TIME1=30; IF MK=0 THENDO;k1=k1-1; DO WHILE K1=0FFH;K1=7; END;END; end;IF SK=0 THEN DO;CALL TIME(10

17、0);/*SET KEY PROCESS*/ TIME1=30; IF SK=0 THEN DO;tem=tem+1;tem=dec(tem);DO CASE K1; DO WHILE tem=7;/*week*/ tem=0; END; DO WHILE tem=60H;/*scond*/ tem=0; END; DO WHILE tem=60H;/*minute*/ tem=0; END; DO WHILE tem=24H;/*hour*/tem=0; END; DO WHILE tem=32H;/*date*/tem=1; END; DO WHILE tem=13H;/*month*/t

18、em=1; END; DO while tem=100h; /*YEAR */tem=00; END; DO WHILE TEM=21H;tem=19H; END; END; A(K1)=tem; if k1=7 then a(8)=tem;END; END;END;END;end key;main$program:mk=1;sk=1;temp1=0;num=0;p32=1;if sk=0 then call beginset;clk=0;da=0;ale=1;loop:do while mk=1 ;if a(0)6 then a(0)=0; command=0bfh; call rbyt8;call display;do while mk=0;