基于单片机的简单四则运算

1、 PAGE - 14 - 课程设计任务书课程设计题目：基于单片机的简单四则运算课 程 设 计 任 务 书1设计目的：掌握电子电路的一般设计方法和设计流程；学习使用Altium Designer软件绘制电路原理图及印刷板图；掌握应用Protues对所设计的电路进行仿真，通过仿真结果验证设计的正确性。2设计内容和要求（包括原始数据、技术参数、条件、设计要求等）：设计一个基于单片机的简单四则运算，具体要求如下：1. 用键盘输入两个十进制数，并用数码管显示所输入的数。2根据所按键来进行相应的运算(加、减、乘、除)，按等号键即显示相应结果。 3. 除数为零时，液晶屏显示“Error！”，以提示输入有误。

2、3设计工作任务及工作量的要求包括课程设计计算说明书(论文)、图纸、实物样品等： 课程设计说明书； 电路原理图和印刷板图； 仿真图形和仿真结果。图1.电路原理图图2.PCB版图图3.Altium Designer 3D电路板正面图图4.Altium Designer 3D电路板背面图图5.材料清单图6.Protues仿真图图7.正确输入时的实物图图8.除数为零时的实物图 程序代码: #include #include #include unsigned char code number=0123456789+-*/.=;unsigned char code xianshi=Made By;uns

3、igned char code tishi=Error!;unsigned char code User68= 0 x04,0 x04,0 x1f,0 x15,0 x15,0 x1f,0 x04,0 x04, /*自定义字“中”*/ 0 x0a,0 x0a,0 x1a,0 x0b,0 x0a,0 x1a,0 x0a,0 x0b, /*自定义字“北” */ 0 x04,0 x00,0 x1f,0 x01,0 x02,0 x04,0 x08,0 x1f, /*自定义字符“之” */ 0 x1b,0 x1b,0 x1b,0 x15,0 x15,0 x15,0 x15,0 x15, /*自定义字符“M

4、” */ 0 x00,0 x00,0 x09,0 x0a,0 x0c,0 x08,0 x08,0 x08, /*自定义字符“r” */ 0 x1f,0 x05,0 x05,0 x07,0 x01,0 x1f,0 x01,0 x03; /*自定义字符“马” */ sbit rs=P20;sbit rw=P21;sbit enable=P22;sbit bf=P07;sbit fmq=P36;unsigned int temp1,temp2,temp;unsigned char flag=0,shu10;void delay(unsigned char i) unsigned char j=114

5、; while(i-) while(j-);void beep(unsigned int i) unsigned int j; for(j=0;ji;j+) fmq=0; delay(1); fmq=1; delay(1); delay(1000);void fanying(unsigned char i) while(i-) _nop_();bit busytest() bit panduan;rs=0;rw=1;enable=1;fanying(4);panduan=bf;enable=0; return panduan;void writecode(char zhiling) while

6、(busytest(); rs=0; rw=0; enable=0; fanying(4); enable=1; P0=zhiling; fanying(8); enable=0; void address(char add) writecode(add + 0 x80);void writestring(char str) while(busytest(); rs=1; rw=0; enable=0; fanying(4); enable=1; P0=str; fanying(8); enable=0; void chushihua() delay(15); writecode(0 x38)

7、; delay(5); writecode(0 x38); delay(5); writecode(0 x38); delay(5); writecode(0 x06); delay(5); writecode(0 x0c); delay(5);void gettemp1(unsigned char i) unsigned char x; temp1=0; for(x=0;x=100) temp1+;void gettemp2(unsigned char i) unsigned char x; temp2=0; for(x=0;x=100) temp2+;void qiu(unsigned i

8、nt temp1,unsigned int temp2) unsigned char ge=0,shi=0,bai=0,qian=0,wan=0; temp=0; switch(flag) case 1:temp=temp1+temp2;break; case 2:temp=temp1-temp2;break; case 3:temp=temp1*temp2;break; case 4: if(temp2=0) address(0 x40); for(;tishige!=0;ge+) writestring(tishige); goto loop; temp=temp1/temp2; brea

9、k; if(0=temp & temp10) ge=temp; writestring(numberge);loop: writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); address(0 x40); if(10=temp & temp100) shi=temp/10; ge=temp%10; writestring(numbe

10、rshi); writestring(numberge); writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); writestring(0 x20); address(0 x40); if(100=temp & temp1000) bai=temp/100; shi=(temp/10)%10; ge=temp%10; writestring(numberbai); writestring(numbershi); writestring(numberge); writestring(0 x

11、20); writestring(0 x20); writestring(0 x20); address(0 x40); if(1000=temp & temp10000) qian=temp/1000; bai=(temp/100)%10; shi=(temp/10)%10; ge=temp%10; writestring(numberqian); writestring(numberbai); writestring(numbershi); writestring(numberge); writestring(0 x20); writestring(0 x20); writestring(

12、0 x20); address(0 x40); if(10000=temp & temp100000) wan=temp/10000; qian=(temp/1000)%10; bai=(temp/100)%10; shi=(temp/10)%10; ge=temp%10; writestring(numberwan); writestring(numberqian); writestring(numberbai); writestring(numbershi); writestring(numberge); writestring(0 x20); writestring(0 x20); wr

13、itestring(0 x20); address(0 x40); void main() unsigned char i=0,j,k,add=0 x40,a=0 x08; chushihua(); address(0 x01); for(;xianshii!=0;i+) writestring(xianshii); i=0 x01; for(j=0;j6;j+) writecode(add=add+0 x08); delay(5); for(k=0;k8;k+) writestring(Userjk); address(a=a+0 x01); delay(5); writestring(i+

14、); address(0 x40); P1=0 xf0; i=0; while(1) if(P1!=0 xf0) delay(60); P1=0 x7f; switch(P1) case 0 x77:writestring(number13);flag=4;gettemp1(i); i=0;beep(50);break;/除法 4 case 0 x7b:writestring(number12);flag=3;gettemp1(i); i=0;beep(50);break; /乘法 3 case 0 x7d:writestring(number11);flag=2;gettemp1(i); i

15、=0;beep(50);break;/减法 2 case 0 x7e:writestring(number10);flag=1;gettemp1(i); i=0;beep(50);break; /加法 1 P1=0 xbf; switch(P1) case 0 xb7:writestring(number14);beep(50);break; case 0 xbb:writestring(number9);shui+=9;beep(50);break; case 0 xbd:writestring(number6);shui+=6;beep(50);break; case 0 xbe:writ

16、estring(number3);shui+=3;beep(50);break; P1=0 xdf; switch(P1) case 0 xd7:writestring(number0);shui+=0;beep(50);break; case 0 xdb:writestring(number8);shui+=8;beep(50);break; case 0 xdd:writestring(number5);shui+=5;beep(50);break; case 0 xde:writestring(number2);shui+=2;beep(50);break; P1=0 xef; swit

17、ch(P1) case 0 xe7:writestring(number15);gettemp2(i);qiu(temp1,temp2);i=0;beep(50);break; /= case 0 xeb:writestring(number7);shui+=7;beep(50);break; case 0 xed:writestring(number4);shui+=4;beep(50);break; case 0 xee:writestring(number1);shui+=1;beep(50);break; delay(60); 课 程 设 计 任 务 书4主要参考文献： 童诗白模拟电子技术基础北京：高等教育出版社，2002 张建华数字电子技术北京：机械工业出版社，2004 陈汝全电子技术常用器件应用手册北京：机械工业出版社，2005 毕满清电子技术实验与课程设计北京：机械工业出版社，2005 潘永雄电子线路CAD实用教程西安：西安电子科技大学出版社，