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- #include <reg51.h>
- typedef unsigned char u8;
- typedef unsigned int u16;
- //sbit 特殊功能位聲明：聲明某特殊功能寄存器中的一位
- #define key P1 //按鍵io口
- sbit fen=P3^0; //蜂鳴器io口
- sbit rs=P3^1; //LCD控制口
- sbit rw=P3^2;
- sbit e=P3^3;
- sbit led=P3^4; //LED燈io口
- //bit 位變量聲明：定義一個(gè)位變量的值
- u8 keyz=17,j=0,biao1=0,a=10,b=10,c=10,d=10;
- bit biao=0;
- u16 zh;
- u8 shu[]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,
- 0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f};
- u8 zi[]={"lnput password:"};
- u8 num[]={"0123456789ABCDEF"};
- void delay(u16 i){
- while(i--);
- }
- /*蜂鳴器*/
- void Fen(u8 a,b) //蜂鳴器發(fā)聲函數(shù)
- {
- u8 i,j;
- for(i=0;i<a;i++)
- {
- for(j=0;j<100;j++)
- {fen=~fen;delay(b);}
- }
- }
- /*LCD*/
- void writecom(u8 com){//LCD寫(xiě)指令
- rs=0;
- rw=0;
- e=0;
- P0=com;
- delay(5);
- e=1;
- e=0;
- }
- void writedat(u8 dat){//LCD寫(xiě)數(shù)據(jù)
- rs=1;
- rw=0;
- e=0;
- P0=dat;
- delay(5);
- e=1;
- e=0;
- }
- void initlcd(){ //LCD初始化函數(shù)
- writecom(0x38); //顯示模式設(shè)置
- writecom(0x0c);
- writecom(0x06);
- }
- void xian(){ //LCD顯示數(shù)字函數(shù)
- writedat(num[keyz]);
- if(a==10){a=keyz; } //對(duì)abcd，四位數(shù)的單獨(dú)賦值
- else if(b==10){b=keyz;}
- else if(c==10){c=keyz;}
- else{d=keyz;}
- if(j!=3){j++;}biao=0;
- }
- /*鍵盤(pán)*/
- void Key(){u8 a=0; //矩形式鍵盤(pán)函數(shù)
- if(key!=0x0f){delay(1000);
- if(key!=0x0f){
- key=0x0f;
- switch(key){
- case 0x07: keyz=0;biao=1;break;
- case 0x0b: keyz=1;biao=1;break;
- case 0x0d: keyz=2;biao=1;break;
- case 0x0e: keyz=3;biao=1;break;
- }
- key=0xf0;
- switch(key){
- case 0x70: keyz=keyz;biao=1;break;
- case 0xb0: keyz=keyz+4;biao=1;break;
- case 0xd0: keyz=keyz+8;biao=1;break;
- case 0xe0: keyz=keyz+12;biao=1;break;
- }
- }
- while((a<50)&&(key!=0xf0)){a++;delay(10000);}
- }
- }
- void shi(){u8 i; // 按鍵值判斷函數(shù)
- if(biao&&keyz!=15){ //判斷標(biāo)志位biao是否為1，為1則有按鍵操作并且按鍵的值不等于15
-
- writecom(0x80+0x40+j); //數(shù)字顯示位置進(jìn)行累加操作
- if(j<0){j=0;} //數(shù)字顯示位置邊界
- switch(keyz){ //switch判斷按鍵并執(zhí)行對(duì)應(yīng)操作
- case 0:xian(); break;
- case 1:xian(); break;
- case 2:xian(); break;
- case 3:xian(); break;
- case 4:xian(); break;
- case 5:xian(); break;
- case 6:xian(); break;
- case 7:xian(); break;
- case 8:xian(); break;
- case 9:xian(); break;
- case 10:writedat(num[keyz]);
-
- j++;biao=0;break;
- case 11:writedat(num[keyz]);
-
- j++;biao=0;break;
- case 12:
- biao1=0; //重置標(biāo)志位biao1,上鎖
- biao=0;break;
- case 13:writecom(0x01);delay(1000); //全屏清除
- for(i=0;i<sizeof(zi);i++){
- writecom(0x80+i);
- writedat(zi[i]);}
- j=0;biao=0;break;
- case 14: //對(duì)當(dāng)前數(shù)字位刪除的操作
- writedat(' ');
- j--;
- writecom(0x80+0x40+j);writedat(' ');
- biao=0;break;
- case 15: //確定按鍵
- j++;biao=0;break;
- }
- }
- if(keyz==15){ //判斷按鍵值如果等于15，便視為按下確定鍵
- writecom(0x01);delay(1000);
- zh=a*1000+b*100+c*10+d; //將ABCD，四位數(shù)合并并進(jìn)行判斷是否為正確密碼
- if(zh==1234){ //設(shè)密碼為1234
- j=0;
- biao1=1; //將biao1標(biāo)志位置1便為密碼正確
- keyz=17; //使按鍵值跳出最大值15便不會(huì)循壞顯示
- }
- else{
- j=0;
- biao1=0; //反之密碼錯(cuò)誤
- keyz=17;
- Fen(20,200); //蜂鳴器報(bào)警
- }
- zh=0;a=10,b=10,c=10,d=10; //重置ABCD變量
- for(i=0;i<sizeof(zi);i++){
- writecom(0x80+i);
- writedat(zi[i]); }
- }
- }
-
- void main(){u8 i; led=1;
- initlcd(); //LCD初始化函數(shù)
- for(i=0;i<sizeof(zi);i++){
- writecom(0x80+i);
- writedat(zi[i]); }
- while(1){
- Key(); //定義鍵盤(pán)函數(shù)
- shi(); //按鍵判斷函數(shù)，燈亮或報(bào)警
- P2=shu[keyz]; //數(shù)碼管顯示當(dāng)前輸入值
- if(biao1==1){ led=0; //判斷標(biāo)志位biao1 為1則密碼正確顯示ok
- writecom(0x80+0x40+10);
- writedat('O');
- writecom(0x80+0x41+10);
- writedat('K'); }
- else if(biao1==0){led=1; //biao1為0則顯示密碼錯(cuò)誤顯示no
- writecom(0x80+0x40+10);
- writedat('N');
- writecom(0x80+0x41+10);
- writedat('O');}
- }
- }
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