/////4×4矩阵键盘 按键为1-16，按键显示0-9、a-f；
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#include #define uchar unsigned char uchar key=0; uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xc0}; void show(uchar key) { P0=table[key];//显示数值 } void Scan_key()//扫描键盘 { uchar m; P1=0xff;//数码管全亮 P2=0x0f;//P2口赋初值低位1高位0 m=P2; switch (m) { case 0x0e: { P2=0xf0; m=P2; switch (m) { case 0xe0:{key=0;show(key);break;} case 0xd0:{key=1;show(key);break;} case 0xb0:{key=2;show(key);break;} case 0x70:{key=3;show(key);break;} default:break; } break; } case 0x0d: { P2=0xf0; m=P2; switch (m) { case 0xe0:{key=4;show(key);break;} case 0xd0:{key=5;show(key);break;} case 0xb0:{key=6;show(key);break;} case 0x70:{key=7;show(key);break;} default:break; } break; } case 0x0b: { P2=0xf0; m=P2; switch (m) { case 0xe0:{key=8;show(key);break;} case 0xd0:{key=9;show(key);break;} case 0xb0:{key=10;show(key);break;} case 0x70:{key=11;show(key);break;} default:break; } break; } case 0x07: { P2=0xf0; m=P2; switch (m) { case 0xe0:{key=12;show(key);break;} case 0xd0:{key=13;show(key);break;} case 0xb0:{key=14;show(key);break;} case 0x70:{key=15;show(key);break;} default:break; } break; } default :break; } } void main() { while(1) { Scan_Key(); } } 因篇幅问题不能全部显示，请点此查看更多更全内容