key_scan.rar_ScanKey库下载_key 74ls164_key sc_key_scan_单片机 算法

#include <reg52.h> //#include <At89X52.h> #define uchar unsigned char #define uint unsigned int sbit keydig_rck=P1^0; //用P3^2模拟串口时钟 sbit keydig_data=P1^1; //用P3^3模拟串口数据 sbit a0=ACC^0; sbit L_1=P2^3; //定义P1_7连接矩阵键盘X_11 sbit L_2=P3^3; //定义P1_6连接矩阵键盘X_10 sbit L_3=P3^2; //定义P1_5连接矩阵键盘X_9 sbit H1=P1^7; //定义P1_7连接矩阵键盘X_12 sbit H2=P1^6; //定义P1_6连接矩阵键盘X_11 sbit H3=P1^5; //定义P1_5连接矩阵键盘X_10 sbit H4=P1^4; //定义P1_4连接矩阵键盘X_9 sbit Y_1=P0^0; //定义P0_0连接矩阵键盘Y_1 sbit Y_2=P0^1; //定义P0_1连接矩阵键盘Y_2 sbit Y_3=P0^2; //定义P0_2连接矩阵键盘Y_3 sbit Y_4=P0^3; //定义P0_3连接矩阵键盘Y_4 sbit Y_5=P0^4; //定义P0_4连接矩阵键盘Y_5 sbit Y_6=P0^5; //定义P0_5连接矩阵键盘Y_6 sbit Y_7=P0^6; //定义P0_6连接矩阵键盘Y_7 sbit Y_8=P0^7; //定义P0_7连接矩阵键盘Y_8 unsigned char bdata key_temp,delay_temp; sbit b_key0=key_temp^0;sbit b_key1=key_temp^1;sbit b_key2=key_temp^2;sbit b_key3=key_temp^3; sbit b_key4=key_temp^4;sbit b_key5=key_temp^5;sbit b_key6=key_temp^6;sbit b_key7=key_temp^7; sbit b_delay0=delay_temp^0;sbit b_delay1=delay_temp^1; sbit b_delay2=delay_temp^2;sbit b_delay3=delay_temp^3; sbit b_delay4=delay_temp^4;sbit b_delay5=delay_temp^5; sbit b_delay6=delay_temp^6;sbit b_delay7=delay_temp^7; unsigned char bdata AD_key; sbit b_AD_key0=AD_key^0; sbit b_AD_key1=AD_key^1; extern uint get_adc(uchar channel); extern bit b_time10ms; //------------------------------------------------------------------------------------------------------- // 函数名称：out_dig // 输入参数：data_buf // 输出参数：无 // 功能说明：8位同步移位寄存器，将data_buf的数据逐位输出到keydig_data //-------------------------------------------------------------------------------------------------------- void out_keydig(uchar data_buf) { uchar i; i=8;//8个移位脉冲 ACC=data_buf; do { keydig_rck=0; keydig_data=a0; keydig_rck=1; ACC=ACC>>1; } while(--i!=0); keydig_rck=0; } uchar scankey_4() {//m=8(74HC164)行,n=8列 unsigned char i,j,keynumber; static unsigned char data key_buffer[8]; static unsigned char data key_delay[8]; bit b_work; out_keydig(0xff); P0=P0|0xFF;L_1=L_2=L_3=1; //P1=P1|0xF0; for (i=0;i<8;i++) {//行扫描 out_keydig(0xff);//X14=X15=X16=X17=X18=X19=1; switch (i) { case 0:out_keydig(0xfe);break;//QH=0 case 1:out_keydig(0xfd);break;//QG=0 case 2:out_keydig(0xfb);break;//QF=0 case 3:out_keydig(0xf7);break;//QE=0 case 4:out_keydig(0xef);break;//QD=0 case 5:out_keydig(0xdf);break;//QC=0 case 6:out_keydig(0xbf);break;//QB=0 case 7:out_keydig(0x7f);break;//QA=0 } key_temp=key_buffer[i];delay_temp=key_delay[i];keynumber=i*8+32;//**32* //delay(10);// for (j=0;j<8;j++) {//读列 switch (j) { case 0: b_work=Y_1; if (b_work!=b_key0) { if(b_delay0) { b_delay0=0;b_key0=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay0=1;key_delay[i]=delay_temp;} } break; case 1: b_work=Y_2; if (b_work!=b_key1) { if(b_delay1) { b_delay1=0;b_key1=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay1=1;key_delay[i]=delay_temp;} } break; case 2: b_work=Y_3; if (b_work!=b_key2) { if(b_delay2) { b_delay2=0;b_key2=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay2=1;key_delay[i]=delay_temp;} } break; case 3: b_work=Y_4; if (b_work!=b_key3) { if(b_delay3) { b_delay3=0;b_key3=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay3=1;key_delay[i]=delay_temp;} } break; case 4: b_work=Y_5; if (b_work!=b_key4) { if(b_delay4) { b_delay4=0;b_key4=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay4=1;key_delay[i]=delay_temp;} } break; case 5: b_work=Y_6; if (b_work!=b_key5) { if(b_delay5) { b_delay5=0;b_key5=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay5=1;key_delay[i]=delay_temp;} } break; case 6: b_work=Y_7; if (b_work!=b_key6) { if(b_delay6) { b_delay6=0;b_key6=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay6=1;key_delay[i]=delay_temp;} } break; case 7: b_work=Y_8; if (b_work!=b_key7) { if(b_delay7) { b_delay7=0;b_key7=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay7=1;key_delay[i]=delay_temp;} } break; // } keynumber++; } /*end of for (j)*/ }/*end of for (i) 键处理结束*/ out_keydig(0xff);//X14=X15=X16=X17=X18=X19=1; P0=P0|0xFF;L_1=L_2=L_3=1; //P1=P1|0xF0; b_time10ms=0; return(0xff);//按键保持不变，则永远返回0xff } uchar scankey_3() {//m=4行,n=8列 unsigned char i,j,keynumber; static unsigned char data key_buffer[8]; static unsigned char data key_delay[8]; bit b_work; //static unsigned char time10ms; out_keydig(0xff);//键盘74HC595行输出HGFEDC置高 //X14=X15=X16=X17=X18=X19=1 P0=P0|0xFF;//列线P0_5～P0_0置高 P1=P1|0xF0; for (i=0;i<4;i++) {//行扫描 switch (i) { case 0: H4=1;H3=1;H2=1;H1=0;break; case 1: H4=1;H3=1;H2=0;H1=1;break; case 2: H4=1;H3=0;H2=1;H1=1;break; case 3: H4=0;H3=1;H2=1;H1=1;break; } key_temp=key_buffer[i];delay_temp=key_delay[i];keynumber=i*8;// //delay(10);// for (j=0;j<8;j++) {//读列 switch (j) { case 0: b_work=Y_1; if (b_work!=b_key0) { if(b_delay0) { b_delay0=0;b_key0=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay0=1;key_delay[i]=delay_temp;} } break; case 1: b_work=Y_2; if (b_work!=b_key1) { if(b_delay1) { b_delay1=0;b_key1=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay1=1;key_delay[i]=delay_temp;} } break; case 2: b_work=Y_3; if (b_work!=b_key2) { if(b_delay2) { b_delay2=0;b_key2=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay2=1;key_delay[i]=delay_temp;} } break; case 3: b_work=Y_4; if (b_work!=b_key3) { if(b_delay3) { b_delay3=0;b_key3=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay3=1;key_delay[i]=delay_temp;} } break; case 4: b_work=Y_5; if (b_work!=b_key4) { if(b_delay4) { b_delay4=0;b_key4=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay4=1;key_delay[i]=delay_temp;} } break; case 5: b_work=Y_6; if (b_work!=b_key5) { if(b_delay5) { b_delay5=0;b_key5=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay5=1;key_delay[i]=delay_temp;} } break; case 6: b_work=Y_7; if (b_work!=b_key6) { if(b_delay6) { b_delay6=0;b_key6=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); } else {b_delay6=1;key_delay[i]=delay_temp;} } break; case 7: b_work=Y_8; if (b_work!=b_key7) { if(b_delay7) { b_delay7=0;b_key7=b_work;key_buffer[i]=key_temp; return(b_work?keynumber+100:keynumber); }