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＃i nclude<reg52.h>#define uint unsigned int#define uchar unsigned char#define duank P1 //鍵盤到單片機的端口//DB 50H,1CH,39H,16H,38H,78H,70H,0FEH,0EFH,0FFH;A B, C, D, E, ,F ,P, -, ,. ,COLSE//DB 01H,0C7H,22H,82H,0C4H,88H,08H,0C3H,00H,80H;帶小數點的字形碼0.,1.,-----9.uchar code table[]={ //鍵盤編碼"1~F~0"0xD7,0x32,0x92,0xD4,0x98,0x18,0xD1,0x10,0x90,0x50,0x1C,0x39,0x16,0x38,0x78,0x11};uchar num,temp,num1;void delay(uint z) //延時子程序 Zms { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--);}uchar keyscan(); //鍵盤函數聲明void display(uchar aa);//顯示函數聲明void main() //主函數{ while(1) { display(keyscan()); }}void display(uchar aa) //顯示子程序{ //dula=1; //P0=table[aa-1]; //dula=0; SBUF=table[aa-1];}uchar keyscan() //鍵盤掃描程序,取回一個鍵盤號{ duank=0xfe; temp=duank; temp=temp&0xf0; while(temp!=0xf0) { delay(5); temp=duank; temp=temp&0xf0; while(temp!=0xf0) { temp=duank; switch(temp) { case 0xee:num=1; break; |
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