基于AT89C51單片機(jī)簡(jiǎn)易計(jì)算器的設(shè)計(jì)

.開(kāi)始初始化參數(shù)初始化LED顯示有鍵輸入？開(kāi)始初始化參數(shù)初始化LED顯示有鍵輸入？讀取鍵碼LED顯示數(shù)字鍵清零鍵功能鍵狀態(tài)清零輸入數(shù)值數(shù)值送顯示緩沖YN等待數(shù)值輸入結(jié)果送顯示緩沖根據(jù)上次功能鍵和輸入的數(shù)據(jù)計(jì)算結(jié)果本次功能鍵？等待數(shù)值輸入結(jié)果送顯示緩沖等待數(shù)值輸入結(jié)果送顯示緩沖算術(shù)運(yùn)算程序流程圖開(kāi)始開(kāi)始運(yùn)算符是？加乘減除運(yùn)算結(jié)果溢出？錯(cuò)誤信息送顯示緩沖數(shù)值送顯示緩沖YYN2、程序清單#include<reg52.h>#include<math.h>#defineucharunsignedchar#defineuintunsignedint#defineulongunsignedlongsbitwela=P2^7; //定義端口sbitdula=P2^6;longin1,in2,out,x;intcnt,i,flag;ucharcodenum[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //LED顯示字模,共陰voiddelay<uintxms>//延時(shí)函數(shù){ uintj; for<i=xms;i>0;i--> for<j=114;j>0;j-->;}voiddisplay<> //顯示函數(shù)聲明{ ucharw1,w2,w3,w4,w5,w6,f=0; longy; if<x>=0>//顯示六位計(jì)時(shí)數(shù) { if<x>=1e6> { P0=0xff; wela=1; P0=0xf7; wela=0; dula=1; P0=num[12]; dula=0; delay<2>; P0=0xff; wela=1; P0=0xef; wela=0; dula=1; P0=0x3e; dula=0; delay<2>; P0=0xff; wela=1; P0=0xdf; wela=0; dula=1; P0=num[0]; dula=0; delay<2>; return; } w1=x%10;w2=x/10%10;w3=x/100%10;w4=x/1000%10;w5=x/10000%10;w6=x/100000%10; if<f==1||w6> { f=1; P0=0xff; wela=1; P0=0xfe; wela=0; dula=1; P0=num[w6]; dula=0; delay<2>; } if<f==1||w5> { f=1; P0=0xff; wela=1; P0=0xfd; wela=0; dula=1; P0=num[w5]; dula=0; delay<2>; } if<f==1||w4> { f=1; P0=0xff; wela=1; P0=0xfb; wela=0; dula=1; P0=num[w4]; dula=0; delay<2>; } if<f==1||w3> { f=1; P0=0xff; wela=1; P0=0xf7; wela=0; dula=1; P0=num[w3]; dula=0; delay<2>; } if<f==1||w2> { f=1; P0=0xff; wela=1; P0=0xef; wela=0; dula=1; P0=num[w2]; dula=0; delay<2>; } P0=0xff; wela=1; P0=0xdf; wela=0; dula=1; P0=num[w1]; dula=0; delay<2>; } else { y=labs<x>; if<y>=1e5> { P0=0xff; wela=1; P0=0xf7; wela=0; dula=1; P0=num[12]; dula=0; delay<2>; P0=0xff; wela=1; P0=0xef; wela=0; dula=1; P0=0x3e; dula=0; delay<2>; P0=0xff; wela=1; P0=0xdf; wela=0; dula=1; P0=num[0]; dula=0; delay<2>; return; } w1=y%10;w2=y/10%10;w3=y/100%10;w4=y/1000%10;w5=y/10000%10; if<f==1||w5> { if<f==0> { P0=0xff; wela=1; P0=0xfe; wela=0; dula=1; P0=0x40; dula=0; delay<2>; } f=1; P0=0xff; wela=1; P0=0xfd; wela=0; dula=1; P0=num[w5]; dula=0; delay<2>; } if<f==1||w4> { if<f==0> { P0=0xff; wela=1; P0=0xfd; wela=0; dula=1; P0=0x40; dula=0; delay<2>; } f=1; P0=0xff; wela=1; P0=0xfb; wela=0; dula=1; P0=num[w4]; dula=0; delay<2>; } if<f==1||w3> { if<f==0> { P0=0xff; wela=1; P0=0xfb; wela=0; dula=1; P0=0x40; dula=0; delay<2>; } f=1; P0=0xff; wela=1; P0=0xf7; wela=0; dula=1; P0=num[w3]; dula=0; delay<2>; } if<f==1||w2> { if<f==0> { P0=0xff; wela=1; P0=0xf7; wela=0; dula=1; P0=0x40; dula=0; delay<2>; } f=1; P0=0xff; wela=1; P0=0xef; wela=0; dula=1; P0=num[w2]; dula=0; delay<2>; } if<f==0> { P0=0xff; wela=1; P0=0xef; wela=0; dula=1; P0=0x40; dula=0; delay<2>; } P0=0xff; wela=1; P0=0xdf; wela=0; dula=1; P0=num[w1]; dula=0; delay<2>; }}voidkeyscan<> //鍵盤(pán)掃描函數(shù){ uchartemp; P1=0xfe; temp=P1; temp=temp&0xf0; if<temp!=0xf0> { delay<8>; temp=P1; temp=temp&0xf0; if<temp!=0xf0> { temp=P1; switch<temp> { case0xee: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+7; x=in1; } else { in2=in2*10+7; x=in2; } } break; case0xde: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+8; x=in1; } else { in2=in2*10+8; x=in2; } } break; case0xbe: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+9; x=in1; } else { in2=in2*10+9; x=in2; } } break; case0x7e: if<cnt!=0&&flag==0> { cnt=0; flag=4; } break; } while<temp!=0xf0> { temp=P1; temp=temp&0xf0; } } } P1=0xfd; temp=P1; temp=temp&0xf0; if<temp!=0xf0> { delay<8>; temp=P1; temp=temp&0xf0; if<temp!=0xf0> { temp=P1; switch<temp> { case0xed: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+4; x=in1; } else { in2=in2*10+4; x=in2; } } break; case0xdd: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+5; x=in1; } else { in2=in2*10+5; x=in2; } } break; case0xbd: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+6; x=in1; } else { in2=in2*10+6; x=in2; } } break; case0x7d: if<cnt!=0&&flag==0> { cnt=0; flag=3; } break; } while<temp!=0xf0> { temp=P1; temp=temp&0xf0; } } } P1=0xfb; temp=P1; temp=temp&0xf0; if<temp!=0xf0> { delay<8>; //消除抖動(dòng) temp=P1; temp=temp&0xf0; if<temp!=0xf0> { temp=P1; switch<temp> { case0xeb: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+1; x=in1; } else { in2=in2*10+1; x=in2; } } break; case0xdb: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+2; x=in1; } else { in2=in2*10+2; x=in2; } } break; case0xbb: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+3; x=in1; } else { in2=in2*10+3; x=in2; } } break; case0x7b: if<cnt!=0&&flag==0> { cnt=0; flag=2; } break; } while<temp!=0xf0> { temp=P1; temp=temp&0xf0; } } } P1=0xf7; temp=P1; temp=temp&0xf0; if<temp!=0xf0> { delay<8>; temp=P1; temp=temp&0xf0; if<temp!=0xf0>//證明有鍵按下,if語(yǔ)句是為了讓鍵盤(pán)松開(kāi) { temp=P1; switch<temp> { case0xe7: cnt=0; in1=0; in2=0; out=0; flag=0; x=0; break; case0xd7: if<cnt<6> { cnt++; if<flag==0> { in1=in1*10+0; x=in1; } else { in2=in2*10+0; x=in2; } } break; case0xb7: //如果得到符號(hào)位 switch<flag> { case1: out=in1+in2; //加 break; case2: out=in1-in2; //減 break; case3: out=in1*in2; //乘 break; case4: if<in2> out=in1/in2; //除 break; } x=out; in1=0; in2=0; cnt=0; flag=0; break; case0x77: if<cnt!=0&&flag==0> { cnt=0; flag=1; } break; } while<temp!=0xf0>//等待按鍵松開(kāi) { temp=P1; temp=temp&0xf0; } } }