C51單片機密碼鎖的設(shè)計

1、#include #define uchar unsigned charuchar starbuf10;uchar wordbuf8;uchar pw8=1,2,3,4,5,6,7,8;uchar pwbuf8;uchar count=0; / 初始沒有輸入密碼，計數(shù)器設(shè)為0uchar inputflag=0; / 先處于密碼輸入狀態(tài)，非密碼修改狀態(tài)bit enterflag=0; / 沒有按下確認(rèn)鍵bit pwflag=0; / 密碼標(biāo)志先置為0sbit warn=P36;sbit deng=P35;#define lcd_data P0sbit rs=P27;sbit rw=P26;sbi

2、t e=P25;/LCD1602驅(qū)動程序/void delay_1602(unsigned int i) while(i-); void enrw() rs=0; rw=0; e=0; delay_1602(250); e=1;write_data(uchar c) lcd_data=c; rs=1; rw=0; e=0; delay_1602(250); e=1;init_lcd(void)/初始化 lcd_data=0 x01;/清屏幕 enrw(); lcd_data=0 x38;/數(shù)據(jù)長度為8位,雙行顯示,5*7字符。 enrw(); lcd_data=0 x0c;/打開顯示開關(guān) en

3、rw(); lcd_data=0 x06;/地址計數(shù)遞增，顯示屏不移動 enrw();write_cmd(uchar m)/寫命令，注意與寫數(shù)據(jù)的區(qū)別 lcd_data=m; enrw();display(uchar row,uchar colum,uchar *s)/行 列 字符 寫字符串，簡單的指針應(yīng)用 uchar p; if(row=1) p=0 x82+colum-1; else p=0 xC0+colum-1; write_cmd(p); for(;*s!=0;s+) write_data(*s);void lcd_display( unsigned char a, unsigned

4、 char b,unsigned char i) /行 列 數(shù) switch (i)case 0: display( a,b, 0) ;break;/* 0 */case 1: display( a,b, 1) ;break;/* 1 */case 2: display( a,b, 2) ;break;/* 2 */case 3: display( a,b, 3) ;break;/* 3 */case 4: display( a,b, 4) ;break;/* 4 */case 5: display( a,b, 5) ;break;/* 5 */case 6: display( a,b, 6)

5、 ;break;/* 6 */case 7: display( a,b, 7) ;break;/* 7 */case 8: display( a,b, 8) ;break;/* 8 */case 9: display( a,b, 9) ;break;/* 9 */default: break; /* 鍵消抖延時函數(shù) */void delay(unsigned int i) int j; for(;i0;i-) for(j=0;j100;j+);/* 鍵掃描函數(shù) */uchar keyscan(void)uchar scancode,tmpcode;P1 = 0 xf0; / 發(fā)全0行掃描碼if

6、 (P1&0 xf0)!=0 xf0)/ 若有鍵按下delay(2);/ 延時去抖動if (P1&0 xf0)!=0 xf0)/ 延時后再判斷一次，去除抖動影響scancode = 0 xfe; /第一行變低while(scancode&0 x10)!=0)/ 逐行掃描P1 = scancode;/ 輸出行掃描碼if (P1&0 xf0)!=0 xf0)/ 本行有鍵按下tmpcode = (P1&0 xf0)|0 x0f;/* 返回特征字節(jié)碼，為1的位即對應(yīng)于行和列 */return(scancode)+(tmpcode);else scancode = (scancode1)|0 x01;/

7、 行掃描碼左移一位return(0);/ 無鍵按下，返回值為0 /* 密碼比較函數(shù) */bit pwcmp(void)bit flag;uchar i;for (i=0;i8;i+)if (pwi=pwbufi)flag = 1;elseflag = 0;i=8;return(flag);/* 密碼清除函數(shù) */void pwclk(unsigned char k)unsigned char i;for (i=0;i8;i+)wordbufi = 0;/ 數(shù)碼管顯示00000000starbufi = 0;if(k=0) pwbufi = 0;/ 用FFFFFF清除已經(jīng)輸入的密碼else pw

8、i = 0;/ 用FFFFFF清除已經(jīng)輸入的密碼/* 按鍵聲響函數(shù) */void alarm() unsigned char i; for(i=0;i200;i+) warn=!warn;delay(1); /* 密碼報警函數(shù) */void alarm1() unsigned int i; for(i=0;i0) for(a=0;a150;a+) warn=!warn;delay(1); for(b=0;b150;b+) warn=!warn; delay(2); i-; /* 按鍵處理函數(shù) */void key_conduct(unsigned char a,unsigned char b)

9、 switch(a) case 0 x48:/ 1行1列，數(shù)字0if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 0;else pwcount = 0; wordbufcount = 0; lcd_display(2,count+1,wordbufcount);count+; alarm();break;case 0 x81:/ 1行2列，數(shù)字1if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 1;else pwcount = 1; wordbufco

10、unt = 1; lcd_display(2,count+1,wordbufcount);count+;alarm();break;case 0 x41:/ 1行3列，數(shù)字2if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 2;else pwcount = 2; wordbufcount = 2; lcd_display(2,count+1,wordbufcount);count+;alarm();break; case 0 x21:/ 1行4列，數(shù)字3if (count8)if(b=0) starbufcount = *

11、;/ 對應(yīng)密碼位上顯示* pwbufcount = 3;else pwcount = 3; wordbufcount = 3; lcd_display(2,count+1,wordbufcount);count+;alarm();break;case 0 x82:/ 2行1列，數(shù)字4if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 4;else pwcount = 4; wordbufcount = 4; lcd_display(2,count+1,wordbufcount);count+;alarm();break;ca

12、se 0 x42:/ 2行2列，數(shù)字5if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 5;else pwcount = 5; wordbufcount = 5; lcd_display(2,count+1,wordbufcount);count+;alarm();break;case 0 x22:/ 2行3列，數(shù)字6if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 6;else pwcount = 6; wordbufcount = 6; lcd_d

13、isplay(2,count+1,wordbufcount);count+;alarm();break;case 0 x84:/ 2行4列，數(shù)字7if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pwbufcount = 7;else pwcount = 7; wordbufcount = 7; lcd_display(2,count+1,wordbufcount);count+;alarm();break;case 0 x44:/ 3行1列，數(shù)字8if (count8)if(b=0) starbufcount = *;/ 對應(yīng)密碼位上顯示* pw

14、bufcount = 8;else pwcount = 8; wordbufcount = 8; lcd_display(2,count+1,wordbufcount);count+;alarm();break;case 0 x24:/ 3行2列，數(shù)字9if (count=3)/ 如果密碼輸入錯誤三次 init_lcd(); init_lcd(); display(1,0,No access!); alarm2(); while(1); while(inputflag=1) / 更改密碼模式 display(1,0,New password:); key = keyscan();/ 調(diào)用鍵盤掃描函數(shù) key_conduct(key,inputflag); if