4x4矩阵键盘电路连接图和快速扫描完整程序

4x4矩阵键盘电路连接图和快速扫描完整程序 4*4矩阵键盘电路连接图和快速扫描完整程序 RP1RESPACK-8非编码键盘扫描12C134U1D0530pF1939D1XTAL1P0.0/AD0638D2X17P0.1/AD137D3CRYSTALP0.2/AD281836D49XTAL2P0.3/AD3C235D5P0.4/AD434D6P0.5/AD533D7P0.6/AD630pF932RSTP0.7/AD7LE121P2.0/A8LE222P2.1/A923P2.2/A102924PSENP2.3/A113025ALEP2.4/A123126EAP2.5/A1327P2.6/A1428P2.7/A15110P1.0P3.0/RXDP1.7P1.6P1.5P1.4211P1.1P3.1/TXD312P1.2P3.2/INT0413P1.3P3.3/INT1514P1.4P3.4/T0615P1.5P3.5/T1P1.0716P1.6P3.6/WR817P1.7P3.7/RDAT89C51P1.1U2219D0D0Q0318D1P1.2D1Q1417D2D2Q2516D3D3Q3615D4D4Q4714D5P1.3D5Q5813D6D6Q6912D7D7Q711LE1LE1OE74HC573U3D0219D0Q0D1318D1Q1D2417D2Q2D3516D3Q3D4615D4Q4D5714D5Q5D6813D6Q6D7Created By 晓竹912D7Q7LE211LE2013-07-191OE74HC573 #include #include #define uint unsigned int #define uchar unsigned char uchar code wei[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xb9,0xbf,0x89,0xad,0x7f,0xff}; uchar temp=0xfe; //键盘扫描前赋给P1口的试探值 uchar beis=0x00; //键盘扫描的识别倍率 sbit LE1=P2^0; sbit LE2=P2^1; uchar key,sm;//key是扫描得到的键值; //////////////////////////////////////////////////////////////////// //显示函数，静态显示 void xianshi(uchar x) { uint b=200; LE2=1; P0=0X0F; LE2=0; LE1=1; P0=wei[x]; while(b--); LE1=0; } //////////////////////////////////////////////////////////////////// //4*4矩阵扫描，键值保存在key中 void key_4x4() { P1=temp; //初值uchar temp=0xfe; sm=P1; sm=sm&0xf0; //取P1口高四位的值，如果为0就表示无键按下 if(sm!=0xf0) { switch(sm) { case 0x70:{key=0+4*beis;break;} case 0xb0:{key=1+4*beis;break;} case 0xd0:{key=2+4*beis;break;} case 0xe0:{key=3+4*beis;break;} default :{key=10+4*beis;break;} } } else { if(temp==0xf7) { temp=0xfe; } else { temp=_crol_(temp,1); } beis++; if(beis==4)beis=0; } } //////////////////////////////////////////////////////////////////// //主函数 void main() { while(1) { key_4x4(); xianshi(key); } }