基于51单片机计算器设计

/*// // _ooOoo_ // o8888888o // 88" . "88 // (| -_- |) // O\ = /O // ____/`---'\____ // .' \\| |// `. // / \\||| : |||// \ // / _||||| -:- |||||- \ // | | \\\ - /// | | // | \_| ''\---/'' | | // \ .-\__ `-` ___/-. / // ___`. .' /--.--\ `. . __ // ."" '< `.___\_<|>_/___.' >'"". // | | : `- \`.;`\ _ /`;.`/ - ` : | | // \ \ `-. \_ __\ /__ _/ .-` / / //======`-.____`-.___\_____/___.-`____.-'====== // `=---=' //^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ // 佛祖保佑 永无BUG */ #include<reg51.h> #define uint unsigned int #define uchar unsigned char sbit e=P2^3; //端口定义 sbit rs=P2^4; sbit rw=P2^0; sbit busy=P0^7; sbit ans=P1^0; //sbit led=P1^7; char i,j,temp,num,num_1; long a,b,c,ans1=0,ans2,ans3; uchar flag,fuhao; uchar x=0; uchar code table[]={7,8,9,0,4,5,6,0,1,2,3,0,0,0,0,0}; uchar code table1[]={7,8,9,0x2f-0x30,4,5,6,0x2a-0x30,1,2,3,0x2d-0x30,0x01-0x30,0,0x3d-0x30,0x2b-0x30}; void delay(uchar z) //延时函数 { uchar y; for(z;z>0;z--) for(y=0;y<110;y++); } void check() //檢測端口是否繁忙 { do{ P0=0xFF; rs=0; rw=1; e=0; delay(1); e=1; }while(busy==1); } void write_com(uchar com)//寫入地址 { P0=com; rs=0; rw=0; e=0; check(); e=1; } void write_date(uchar date) //写入数据 { P0=date; rs=1; rw=0; e=0; check(); e=1; } void init() //初始化函数 { num=-1; e=1; write_com(0X01); //液晶端口初始化 delay(1); write_com(0x38); delay(1); write_com(0x0c); delay(1); write_com(0x06); delay(1); write_com(0x80); delay(1); write_com(0x01); delay(1); num_1=0; i=0; j=0; a=0; b=0; c=0; //和，差，积，商 flag=0; fuhao=0; // + - * / } void keyscan() //按键扫描 { if(ans==0) { delay(5); if(ans==0) { a=ans2; ans3=ans2; write_com(0x01); delay(200); write_com(0x80+0x4f);//?????,??????????????? write_com(0x04); //?????????,???????,?????? while(ans2!=0) { write_date(0x30+ans2%10); ans2=ans2/10; } ans1=1; //write_date(0x30+x); //??"=" } while(!ans); } /*------矩阵按键扫描-------*/ P3=0xfe;//扫描第一行按键 1111 1110 P37-P30 P30口为0 if(P3!=0xfe) // { delay(20); if(P3!=0xfe)//消抖 { temp=P3&0xf0; // 检测P3口 0xf0 1111 0000 switch(temp) { case 0xe0:num=0; //第一列 1110 0000 P37-P30 break; case 0xd0:num=1; //1101 0000 break; case 0xb0:num=2; break; case 0x70:num=3; break; } } while(P3!=0xfe); if(num==0||num==1||num==2) { if(j!=0) { write_com(0x01); //LCD清屏函数 j=0; } if(flag==0) { a=a*10+table[num]; // } else { b=b*10+table[num]; } } else { if(ans1==0) { flag=1; fuhao=4; ans1=0; } if(ans1==1) { write_com(0x01); if(ans3<10) write_date(0x30+ans3%10); if(ans3>10) { write_date(0x30+ans3/10); write_date(0x30+ans3%10); } flag=1; fuhao=4; ans1=0; j=0; } } i=table1[num]; write_date(0x30+i); } P3=0xfd; // 1111 1101 if(P3!=0xfd) { delay(5); if(P3!=0xfd) { temp=P3&0xf0; switch(temp) { case 0xe0:num=4; break; case 0xd0:num=5; break; case 0xb0:num=6; break; case 0x70:num=7; break; } } while(P3!=0xfd); if(num==4||num==5||num==6&&num!=7) { if(j!=0) { write_com(0x01); j=0; } if(flag==0) { a=a*10+table[num]; } else { b=b*10+table[num]; } } else { if(ans1==0) { flag=1; fuhao=3; ans1=0; } if(ans1==1) { write_com(0x01); if(ans3<10) write_date(0x30+ans3%10); if(ans3>10) { write_date(0x30+ans3/10); write_date(0x30+ans3%10); } flag=1; fuhao=3; ans1=0; j=0; } } i=table1[num]; write_date(0x30+i); } P3=0xfb; if(P3!=0xfb) { delay(5); if(P3!=0xfb) { temp=P3&0xf0; switch(temp) { case 0xe0:num=8; break; case 0xd0:num=9; break; case 0xb0:num=10; break; case 0x70:num=11; break; } } while(P3!=0xfb); if(num==8||num==9||num==10)//??????'1','2'?'3' { if(j!=0) { write_com(0x01); j=0; } if(flag==0)//??????? { a=a*10+table[num]; } else//??????? { b=b*10+table[num]; } } else if(num==11)//??????'-' { if(ans1==0) { flag=1; fuhao=2; ans1=0; } if(ans1==1) { write_com(0x01); if(ans3<10) write_date(0x30+ans3%10); if(ans3>10) { write_date(0x30+ans3/10); write_date(0x30+ans3%10); } flag=1; fuhao=2; ans1=0; j=0; } } i=table1[num]; write_date(0x30+i); } P3=0xf7; if(P3!=0xf7) { delay(5); if(P3!=0xf7) { temp=P3&0xf0; switch(temp) { case 0xe0:num=12; break; case 0xd0:num=13; break; case 0xb0:num=14; break; case 0x70:num=15; break; } } while(P3!=0xf7); switch(num) { case 12:{ write_com(0x01); a=0; b=0; flag=0; fuhao=0; } break; case 13:{ //????"0" if(flag==0)// { a=a*10; write_date(0x30); } else if(flag==1)//??????? { b=b*10; write_date(0x30); } } break; case 14:{ //等于运算 j=1; if(fuhao==1) { write_com(0x80+0x4f);// write_com(0x04); // c=a+b; //加运算 ans2=c; while(c!=0) { write_date(0x30+c%10); c=c/10; } write_date(0x3d); //??"=" a=0;b=0;flag=0;fuhao=0; } else if(fuhao==2) { write_com(0x80+0x4f);// write_com(0x04); // if(a-b>0) { c=a-b;//减运算 ans2=c; } else { c=b-a; ans2=c; } while(c!=0) { write_date(0x30+c%10); c=c/10; } if(a-b<0) write_date(0x2d); write_date(0x3d); //??"=" a=0;b=0;flag=0;fuhao=0; } else if(fuhao==3) { write_com(0x80+0x4f); write_com(0x04); c=a*b; //乘运算 ans2=c; while(c!=0) { write_date(0x30+c%10); c=c/10; } write_date(0x3d); a=0;b=0;flag=0;fuhao=0; } else if(fuhao==4) { write_com(0x80+0x4f); write_com(0x04); i=0; c=(long)((float)a/b);