简单的单片机计算器程序.doc

请支持原创，谢谢 1、电路图 2、程序： /***********************************************************************************************************design by DX from GDOU**************************** **********************************************************/ #include reg51.h #include intrins.h #define uint8 unsigned char sbit led1=P1^0; sbit led2=P1^1; sbit led3=P1^2; sbit led4=P1^3; long int count1,count2; //存放上次的输入和现在的输入 uint8 symbol,p; //存放符号的数值 p用于多数输入清屏作用 long int outputcount; //存放结果 uint8 KeyCodeTable[]={0x28,0x14,0x24,0x44,0x12,0x22,0x42,0x11,0x21,0x41, 0x18,0x88,0x84,0x82,0x81,0x48}; //键盘按键特征表 int table[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90} ;//不懂 uint8 a[4]; void init() { uint8 j; a[0]=0xc0; for(j=1;j4;j++) { a[j]=0xff; } count1=0; count2=0; symbol=0; p=0; outputcount=0; } { uint8 i; while(x--) for(i=0;i120;i++); } void display() //LED显示 { P0 = a[0]; led1=0; delayms(5); led1=1; P0 = a[1]; led2=0; delayms(5); led2=1; P0 = a[2]; led3=0; delayms(5); led3=1; P0 = a[3]; led4=0; delayms(5); led4=1; } uint8 keyscan() //键盘扫描 { uint8 sCode,kCode,i,k; P2=0xf0; if((P20xf0)!=0xf0) { delayms(2); //软件去抖 if((P20xf0)!=0xf0) { sCode=0xfe; for(k=0;k4;k++) { P2=sCode; delayms(12); if((P20xf0)!=0xf0) { kCode=~P2; for(i=0;i16;i++) if(kCode==KeyCodeTable[i]) return(i); } else sCode=_crol_(sCode,1); } } } return(100); //没按键输入 } void output(long int x) { int i; uint8 j=0; uint8 z[3]={0,0,0} ; if(x=1000) { i=x/1000; z[0]=i; a[j]=table[i]; j++; } if(x=100) { i=(x-z[0]*1000)/100; z[1]=i; a[j]= table[i]; j++; } if(x=10) { i=(x-z[0]*1000-z[1]*100)/10; z[2]=i; a[j]= table[i]; j++; }