14.按键控制数码管加减显示.zip

/*每次按下任意一个按键都可以实现数码管加一，按下不同的按键会在不同的位 显示出*/ #include<reg52.h> typedef unsigned char u8; typedef unsigned int u16; #define key P1 //定义P1为key u8 smgduan[16]={0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71};// 段选 u8 smgwei[8]={0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c}; //位选 //u8 keydat[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//存储按键的值 void delay(u16 i) { while(i--); } void keyscan() { static u8 k=0; switch(key) { case 0xfe: if(key==0xfe) { delay(1000); if(key==0xfe) { P0=smgduan[k]; P2=smgwei[0]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k1 case 0xfd: if(key==0xfd) { delay(1000); if(key==0xfd) { P0=smgduan[k]; P2=smgwei[1]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k2 case 0xfb: if(key==0xfb) { delay(1000); if(key==0xfb) { P0=smgduan[k]; P2=smgwei[2]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k3 case 0xf7: if(key==0xf7) { delay(1000); if(key==0xf7) { P0=smgduan[k]; P2=smgwei[3]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k4 case 0xef: if(key==0xef) { delay(1000); if(key==0xef) { P0=smgduan[k]; P2=smgwei[4]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k5 case 0xdf: if(key==0xdf) { delay(1000); if(key==0xdf) { P0=smgduan[k]; P2=smgwei[5]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k6 case 0xbf: if(key==0xbf) { delay(1000); if(key==0xbf) { P0=smgduan[k]; P2=smgwei[6]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k7 case 0x7f: if(key==0x7f) { delay(1000); if(key==0x7f) { P0=smgduan[k]; P2=smgwei[7]; while(key==0xfd); k++; if(k==10)k=0; } }break;//k8 default : break; } } void main() { P0=0x00;//数码管清零 while(1) { keyscan(); delay(20000);//延时起到控制每个加数累加的间隔 } }