0-999数码管显示

#includereg52.h#defineucharunsignedchar#defineuintunsignedintvoiddisplay(uchar);voiddelay(uint);ucharcodetable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};sbitled=P1^0;sbitkey=P3^2;sbitdula=P2^6;sbitwela=P2^7;ucharnum,x,y;voidmain(){P3=0xff;num=0;while(1){if(key==0){delay(10);if(key==0){led=0;num++;if(num==10)num=0;while(!key);delay(10);while(!key);}}elseled=1;display(num);}}voiddisplay(uchary){wela=1;P0=0Xfe;wela=0;P0=0xff;delay(100);dula=1;P0=table[y];dula=0;delay(100);}voiddelay(uintx){uinti,j;for(i=x;i0;i--)for(j=110;j0;j--);}