《C51单片机密码锁的设计》由会员分享，可在线阅读，更多相关《C51单片机密码锁的设计（13页珍藏版）》请在金锄头文库上搜索。
1、#include #define uchar unsigned charuchar starbuf10;uchar wordbuf8;uchar pw8=1,2,3,4,5,6,7,8;uchar pwbuf8;uchar count=0; / 初始没有输入密码，计数器设为0uchar inputflag=0; / 先处于密码输入状态，非密码修改状态bit enterflag=0; / 没有按下确认键bit pwflag=0; / 密码标志先置为0sbit warn=P36;sbit deng=P35;#define lcd_data P0sbit rs=P27;sbit rw=P26;sbi
2、t e=P25;/LCD1602驱动程序/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=0x01;/清屏幕 enrw(); lcd_data=0x38;/数据长度为8位,双行显示,5*7字符。 enrw(); lcd_data=0x0c;/打开显示开关 enrw(
3、); lcd_data=0x06;/地址计数递增，显示屏不移动 enrw();write_cmd(uchar m)/写命令，注意与写数据的区别 lcd_data=m; enrw();display(uchar row,uchar colum,uchar *s)/行 列 字符 写字符串，简单的指针应用 uchar p; if(row=1) p=0x82+colum-1; else p=0xC0+colum-1; write_cmd(p); for(;*s!=0;s+) write_data(*s);void lcd_display( unsigned char a, unsigned char
4、b,unsigned char i) /行 列 数 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) ;brea
5、k;/* 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; /* 键消抖延时函数 */void delay(unsigned int i) int j; for(;i0;i-) for(j=0;j100;j+);/* 键扫描函数 */uchar keyscan(void)uchar scancode,tmpcode;P1 = 0xf0; / 发全0行扫描码if (P1&0x
6、f0)!=0xf0)/ 若有键按下delay(2);/ 延时去抖动if (P1&0xf0)!=0xf0)/ 延时后再判断一次，去除抖动影响scancode = 0xfe; /第一行变低while(scancode&0x10)!=0)/ 逐行扫描P1 = scancode;/ 输出行扫描码if (P1&0xf0)!=0xf0)/ 本行有键按下tmpcode = (P1&0xf0)|0x0f;/* 返回特征字节码，为1的位即对应于行和列 */return(scancode)+(tmpcode);else scancode = (scancode1)|0x01;/ 行扫描码左移一位return(0)
7、;/ 无键按下，返回值为0 /* 密码比较函数 */bit pwcmp(void)bit flag;uchar i;for (i=0;i8;i+)if (pwi=pwbufi)flag = 1;elseflag = 0;i=8;return(flag);/* 密码清除函数 */void pwclk(unsigned char k)unsigned char i;for (i=0;i8;i+)wordbufi = 0;/ 数码管显示00000000starbufi = 0;if(k=0) pwbufi = 0;/ 用FFFFFF清除已经输入的密码else pwi = 0;/ 用FFFFFF清除已
8、经输入的密码/* 按键声响函数 */void alarm() unsigned char i; for(i=0;i200;i+) warn=!warn;delay(1); /* 密码报警函数 */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-; /* 按键处理函数 */void key_conduct(unsigned char a,unsigned char b) switch(a) case 0x
9、48:/ 1行1列，数字0if (count8)if(b=0) starbufcount = *;/ 对应密码位上显示* pwbufcount = 0;else pwcount = 0; wordbufcount = 0; lcd_display(2,count+1,wordbufcount);count+; alarm();break;case 0x81:/ 1行2列，数字1if (count8)if(b=0) starbufcount = *;/ 对应密码位上显示* pwbufcount = 1;else pwcount = 1; wordbufcount = 1; lcd_display
10、(2,count+1,wordbufcount);count+;alarm();break;case 0x41:/ 1行3列，数字2if (count8)if(b=0) starbufcount = *;/ 对应密码位上显示* pwbufcount = 2;else pwcount = 2; wordbufcount = 2; lcd_display(2,count+1,wordbufcount);count+;alarm();break; case 0x21:/ 1行4列，数字3if (count8)if(b=0) starbufcount = *;/ 对应密码位上显示* pwbufcount = 3;else pwcount = 3; wordbufcount = 3; lcd_display(2,count+1,wordbufcount);count+;alarm();break;case 0x82:/ 2行1列，数字4
