基于51单片机的数码管简易计算器

1、基于51/52单片机的简易计算器制作11级自动化2班王栎斐宋为为闫巨东一、题目利用单片机芯片STC89C52、四位八段共阳数码管及已制作好的电路板等器件设计制作一个计算器。二、任务与要求要求计算器能实现加减乘除四种运算託具体如下-加法：四位整数加法计算结果若超过八位则显示计算错误减法：四位整数减法计算结果若超过八位则显示计算错误乘法：多位整数乘法计算结果若超过四位则显示计算错误除法：整数除法有清除功能三、课程设计简述总体设计思路简述1按照系统设计的功能的要求岚初步确定设计系统由主控模块、显示模块、键扫描接口电路共三个模块组成。主控芯片使用STC89C52单片机。2.键盘电路采用4*4矩阵键盘电

2、路。3显示模块采用共阳极数码管构成。四、硬件电路七ra芬-#defineucharunsignedchar#defineuintunsignedint/ucharcodenum=0 x3f,0 x06,0 x5b,0 x4f,0 x66,0 x6d,0 x7d,0 x07,0 x7f,0 x6f,0 x00,0 x40;/共阴极/0123456789熄灭-/ucharcodeloc=0 xff,0 xfe,0 xfd,0 xfb,0 xf7;/ucharcodeero=0 x79,0 x50,0 x5c;ucharcodenum=0 xc0,0 xf9,0 xa4,0 xb0,0 x99,0

3、x92,0 x82,0 xf8,0 x80,0 x90,0 xff,0 x40;/共阳极ucharcodeloc=0 x00,0 x80,0 x40,0 x20,0 x10;ucharcodeero=0 x79,0 x50,0 x5c;uintn=0,n1=0,n2=0;/赋初值ucharflag=0;/计算类型选择关键字voiddelay(intt);voiddisplay(intn);voiderror();main()while(1)uchartemp;/第一行检测P3=0 xfe;temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)delay(10);temp

4、=P3;temp=temp&0 xfe;if(temp!=0 xfe)temp=P3;switch(temp)case0 xee:n1=0;n2=0;n=0;flag=0;break;/清零case0 xde:n1=10*n1+0;n=n1;break;/0case0 xbe:if(flag=1)n=n2+n1;/=if(flag=2)n=n2-n1;if(flag=3)n=n2*n1;if(flag=4)n=n2/n1;n1=0;break;case0 x7e:/+n2=n1;n1=0;flag=1;break;while(temp!=0 xf0)temp=P3;temp=temp&0 xf

5、0;/扫描第二行P3=0 xfd;temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)delay(10);temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)temp=P3;switch(temp)/4/5/6case0 xed:n1=10*n1+1;n=n1;break;case0 xdd:n1=10*n1+2;n=n1;break;case0 xbd:n1=10*n1+3;n=n1;break;case0 x7d:/-n2=n1;n1=0;flag=2;break;while(temp!=0 xf0)temp=P3;temp=temp&0

6、 xf0;/扫描第三行P3=0 xfb;temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)delay(10);temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)temp=P3;switch(temp)case0 xeb:n1=10*n1+4;n=n1;break;case0 xdb:n1=10*n1+5;n=n1;break;case0 xbb:n1=10*n1+6;n=n1;break;case0 x7b:/*n2=n1;n1=0;flag=3;break;while(temp!=0 xf0)temp=P3;temp=temp&0 xf

7、0;/扫描第四行P3=0 xf7;temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)delay(10);temp=P3;temp=temp&0 xf0;if(temp!=0 xf0)temp=P3;switch(temp)TOC o 1-5 h zcase0 xe7:n1=10*n1+7;n=n1;break;/7case0 xd7:n1=10*n1+8;n=n1;break;/8case0 xb7:n1=10*n1+9;n=n1;break;/9case0 x77:/n2=n1;n1=0;flag=4;break;while(temp!=0 xf0)temp=P3

8、;temp=temp&0 xf0;display(n);/延时函数voiddelay(intt)intx,y;for(x=0;xt;x+)for(y=0;y9999)|(n=0)&(n=10)P0=nums;P2=loc3;delay(2);P2=loc0;delay(3);if(n=100)P0=numb;P2=loc2;delay(2);P2=loc0;delay(3);if(n=1000)P0=numq;P2=loc1;delay(2);P2=loc0;delay(3);/负数if(n=-999)abs=-n;g=abs%10;s=abs/10%10;b=abs/100%10;q=abs

9、/1000%10;P0=numg;P2=loc4;delay(2);P2=loc0;delay(2);if(abs/10%100)|(abs/100%100)P0=nums;P2=loc3;delay(2);P2=loc0;delay(2);if(abs/100%100)P0=numb;P2=loc2;delay(2);P2=loc0;delay(2);if(abs/1000%100)P0=numq;P2=loc1;delay(2);P2=loc0;delay(2);elseP0=num11;P2=loc1;delay(2);P2=loc0;delay(2);elseP0=num11;P2=loc2;delay(2);P2=loc0;delay(2);elseP0=num11;P2=loc3;delay(2);P2=loc0;delay(2);/溢出显示voiderror()P2=loc1;P0=ero0;dela