一个液晶显示的数字式电脑温度计.docx

1、一个液晶显示的数字式电脑温度计一个液晶显示的数字式电脑温度计文章来源：遥控网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： 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

2、做成温控器。 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： 点击看大图上图中，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

3、调节键。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) by

4、te constant (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; send

5、1302:procedure(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:procedu

6、re;/*时钟多字节突发模式写过程*/ declare j byte; 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;

7、 CALL CLEAR; END RBYT1; send595:procedure; declare k 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; R

8、ST=1; call send1302(abc); IO=1; DO I=0 TO 7; SCLK=1; SCLK=0; CY=IO; 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:procedur

9、e; call wbyt1(8eh,0); /* write enable */ call wbyt1(0f0h,ab(0); call wbyt1(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)

10、 byte; call clear; rst=1; call send1302(command); io=1; do j=1 to 8; do i=0 to 7; 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) then do; do num=0 to 35; call t

11、ime(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)=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;

12、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 send595; 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

13、 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 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)

14、; 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)=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

15、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); /* set 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 then do; do i=0 to 5; /*

16、 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; 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 th

17、en do;call time(100); /*MOD KEY PROCESS*/ TIME1=30; IF MK=0 THEN DO; k1=k1-1; DO WHILE K1=0FFH; K1=7; END; END; end; IF SK=0 THEN DO;CALL TIME(100); /*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=

18、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*/ tem=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

19、 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; call key; call wbyt1(8eh,0); command=0beh; call wbyt8; call wbyt1(0C0H,A(8); call wbyt1(8eh,80h); end; end; goto loop; end start;