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#include <reg52.h> #define uint unsigned int #define uchar unsigned char sbit leden=P3^7; sbit rs=P3^5; sbit rw=P3^6; sbit beep=P3^4; uchar i,j,num,num_1,temp; long a,b,c; float a_c,b_c; uchar flag,fuhao; uchar code table[]={7,8,9,0, 4,5,6,0, 1,2,3,0}; 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 xms) { uchar i,j; for(i=xms;i>0;i--) for(j=200;j>0;j--); } // void di() //{ // beep=0; // delay(100); // beep=1; //} void write_com(uint w) { rs=0; rw=0; leden=0; P0=w; leden=1; delay(10); leden=0; } void write_data(uint q) { rs=1; rw=0; leden=0; P0=q; leden=1; delay(10); leden=0; } void init() { num=1; leden=1; write_com(0x38); write_com(0x08); write_com(0x01); write_com(0x06); write_com(0x0f); num_1=0; i=0; j=0; a=0; b=0; c=0; flag=0; fuhao=0; } void keyscan() { P2=0Xfe; if(P2!=0xfe) { delay(100); // di(); if(P2!=0xfe) { temp=P2&0xf0; switch(temp) { case 0xe0:num=0;break; case 0xd0:num=1;break; case 0xb0:num=2;break; case 0x70:num=3;break; } } while(P2!=0xfe); if(num==0||num==2||num==1) { if(j!=0) { write_com(0x01); j=0; } if(flag==0) { a=a*10+table[num]; } else { b=b*10+table[num]; } } else { flag=1; fuhao=4; } i=table1[num]; write_data(0x30+i); } P2=0xfd; if(P2!=0xfd) { delay(100); // di(); if(P2!=0xfd) { temp=P2&0xf0; switch(temp) { case 0xe0:num=4;break; case 0xd0:num=5;break; case 0xb0:num=6;break; case 0x70:num=7;break; } } while(P2!=0xfd); if(num==4||num==5||num==6) { if(j!=0) { write_com(0x01); j=0; } if(flag==0) { a=a*10+table[num]; } else { b=b*10+table[num]; } } else { flag=1; fuhao=3; } i=table1[num]; write_data(0x30+i); } P2=0xfb; if(P2!=0xfb) { delay(100); // di(); if(P2!=0xfb) { temp=P2&0xf0; switch(temp) { case 0xe0:num=8;break; case 0xd0:num=9;break; case 0xb0:num=10;break; case 0x70:num=11;break; } } while(P2!=0xfb); if(num==8||num==9||num==10) { 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) { flag=1; fuhao=2; } i=table1[num]; write_data(0x30+i); } P2=0xf7; if(P2!=0xf7) { delay(100); // di(); if(P2!=0xf7) { temp=P2&0xf0; switch(temp) { case 0xe0:num=12;break; case 0xd0:num=13;break; case 0xb0:num=14;break; case 0x70:num=15;break; } } while(P2!=0xf7); switch(num) { case 12: { write_com(0x01); a=0; b=0; flag=0; fuhao=0; } break; case 13: { if(flag==0) { a=a*10; // di(); write_data(0x30); } else if(flag==1) { b=b*10; write_data(0x30); } } break; case 14: { j=1; if(fuhao==1) { write_com(0x80+0x4f); write_com(0x04); c=a+b; // di(); while(c!=0) { write_data(0x30+c%10); c=c/10; } write_data(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; } else { c=b-a; } while(c!=0) { write_data(0x30+c%10); c=c/10; } if(a-b<0) write_data(0x2d); write_data(0x3d); a=0; b=0; flag=0; fuhao=0; } else if(fuhao==3) { write_com(0x80+0x4f); write_com(0x04); c=a*b; // di(); while(c!=0) { write_data(0x30+c%10); c=c/10; } write_data(0x3d); a=0;b=0; flag=0; fuhao=0; } else if(fuhao==4) { write_com(0x80+0x4f); write_com(0x04); i=0; c=a%b; // di(); while(c!=0) { write_data(0x30+c%10); c=c/10; i++; if(i==3) write_com(0x2e); } if(a/b<=0) write_data(0x30); write_data(0x3d); a=0; b=0; flag=0; fuhao=0; } } break; case 15: { write_data(0x30+table1[num]); flag=1; fuhao=1; // di(); } break; } } P2=0xf0; } void main() { init(); while(1) { keyscan(); } } |
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