单片机课程设计:基于LCD1602显示的51单片机密码锁设计

#include <reg52.h> //调用单片机头文件 #define uchar unsigned char //无符号字符型 宏定义 变量范围0~255 #define uint unsigned int //无符号整型 宏定义 变量范围0~65535 uchar value,i; //变量 sbit relay = P2^2; //继电器定义 sbit beep = P3^3; //蜂鸣器定义 sbit beiguan = P2^3; //背光 uint flag_time; uint flag_guan; uchar smg_i; uchar dis_smg[7]={0}; uchar password[7]={6,5,4,3,2,1}; //密码保存 uchar password_bj[7]={1,2,3,4,5,6}; //密码比较 uchar code password_r[6] = {1,2,3,1,2,3} ; uchar code password_gl[6] = {5,2,0,0,2,5} ; uchar password_xg[6]; //密码修改 uchar flag_password; //密码正确否 uchar flag_password_cichu1;//密码错误次数 bit flag_200ms=1; //200ms标志位 uchar key_can; uchar menu_1,menu_i; sbit scl = P2^1; //24C02 IO口定义 sbit sda = P2^0; //24C02 IO口定义 uchar code table_num[]="0123456789abcdefg"; sbit rs=P2^5; //寄存器选择信号 H:数据寄存器 L:指令寄存器 sbit rw=P2^6; //寄存器选择信号 H:数据寄存器 L:指令寄存器 sbit e =P2^7; //片选信号 下降沿触发 /***********************延时函数************************/ void delay_uint(uint q) { while(q--); } /***********************lcd1602写命令函数************************/ void write_com(uchar com) { e=0; rs=0; rw=0; P0=com; delay_uint(3); e=1; delay_uint(25); e=0; } /***********************lcd1602写数据函数************************/ void write_data(uchar dat) { e=0; rs=1; rw=0; P0=dat; delay_uint(3); e=1; delay_uint(25); e=0; } /*********************光标控制***********************/ void lcd1602_guanbiao(uchar open_off,uchar add) { if(open_off == 1) //开光标 { write_com(0x80+add); //将光标移动到秒个位 write_com(0x0f); //显示光标并且闪烁 } else { write_com(0x0c); //关光标 } } /***********************lcd1602上显示两位十进制数************************/ void write_sfm2(uchar hang,uchar add,uchar date) { uchar shi,ge; if(hang==1) write_com(0x80+add); else write_com(0x80+0x40+add); shi=date%100/10; ge=date%10; write_data(0x30+shi); write_data(0x30+ge); } /***********************lcd1602上显示这字符函数************************/ void write_string(uchar hang,uchar add,uchar *p) { if(hang==1) write_com(0x80+add); else write_com(0x80+0x40+add); while(1) { if(*p == '\0') break; write_data(*p); p++; delay_uint(50); } } /***********************lcd1602初始化设置************************/ void init_1602() { write_com(0x38); // delay_uint(100); write_com(0x38); delay_uint(100); write_com(0x0c); write_com(0x06); write_com(0x01); write_com(0x80); delay_uint(1000); write_string(1,0," Password Lock "); write_string(2,0," Input: "); lcd1602_guanbiao(1,7+0x40); //开光标 } /***************启始信号 ***************************/ void start() { sda = 1; scl = 1; sda = 0; scl = 0; } /****************结束信号 **************************/ void stop() { sda = 0; scl = 1; sda = 1; scl = 0; } /*****************检测应答*************************/ void ack() { uchar i; sda = 1; scl = 1; while((i < 100) & (sda == 1)) i++; scl =0; } void ack_zhuji() { sda = 0; scl = 1; scl = 0; sda = 1; } /*****************非应答*************************/ void no_ack() { sda = 1; scl = 1; scl = 0; } /*****************写一个字节*************************/ void write_iic(uchar dat) { uchar i; for(i=0;i<8;i++) { scl = 0; dat <<= 1 ; sda = CY; scl = 1; } scl = 0; } /*******************读一个字节***********************/ uchar read_iic() { uchar i,value; for(i=0;i<8;i++) { scl = 1; value <<= 1; if(sda == 1) value |= 0x01; scl = 0; } return value; } /*****************向24C02写一个字节进去*************************/ void write_24c02(uchar add,uchar dat) { start(); write_iic(0xa0); ack(); write_iic(add); ack(); write_iic(dat); no_ack(); stop(); } /******************从24C02读一个字节进去************************/ uchar read_24c02(uchar add) { uchar value; start(); write_iic(0xa0); ack(); write_iic(add); ack(); start(); write_iic(0xa1); ack(); value = read_iic(); no_ack(); stop(); return value; } /*****************向24C02写多个字节进去*************************/ void write_24c02_8(uchar n,uchar add,uchar *p) { uchar i; EA = 0; start(); write_iic(0xa0); ack(); write_iic(add); for(i=0;i<n;i++) { ack(); write_iic(*p); p++; } no_ack(); stop(); EA = 1; } /******************从24C02读多个字节进去************************/ void read_24c02_8(uchar n,uchar add,uchar *p) { uchar i; EA = 0; start(); write_iic(0xa0); ack(); write_iic(add); ack(); start(); write_iic(0xa1); ack(); for(i=0;i<n;i++) { p[i] = read_iic(); if(i == n-1) { ack(); stop(); } else ack_zhuji(); } EA = 1; } /***********************1ms延时函数*****************************/ void delay_1ms(uint q) { uint i,j; for(i=0;i<q;i++) for(j=0;j<120;j++); } void key() //独立按键程序 { static uchar key_new = 0, key_l; key_can = 20; //按键值还原 P1 = 0x0f; if((P1 & 0x0f) != 0x0f) //按键按下 { delay_1ms(1); //按键消抖动 if(((P1 & 0x0f) != 0x0f) && (key_new == 1)) { //确认是按键按下 key_new = 0; key_l = (P1 | 0xf0); //矩阵键盘扫描 P1 = key_l; switch(P1) { case 0xee: key_can = 1; break; //得到按键值 case 0xde: key_can = 4; break; //得到按键值 case 0xbe: key_can = 7; break; //得到按键值 case 0x7e: key_can = 10; break; //得到按键值 case 0xed: key_can = 0; break; //得到按键值 case 0xdd: key_can = 8; break; //得到按键值 case 0xbd: key_can = 5; break; //得到按键值 case 0x7d: key_can = 2; break; //得到按键值 case 0xeb: key_can = 3; break; //得到按键值 case 0xdb: key_can = 6; break; //得到按键值 case 0xbb: key_can = 9; break; //得到按键值 case 0x7b: key_can = 11; break; //得到按键值 case 0xe7: key_can = 15; break; //得到按键值 case 0xd7: key_can = 14; break; //得到按键值 case 0xb7: key_can = 13; break; //得到按键值 case 0x77: key_can = 12; break; //得到按键值 } } } else { key_new = 1; } } /***************把数组清空**********************/ void clear_shuzu(uchar *p) { for(i=0;i<7;i++) p[i] = 0; } /*************定时器0初始化程序***************/ void time_init() { EA = 1; //开总中断 TMOD = 0X01; //定时器0、工作方式1 ET0 = 1; //开定时器0中断 TR0 = 1; //允许定时器0定时 } /******************下载程序密码初始化**********************/ void password_chushifa() { scl = 0; value = read_24c02(10) ; if(value != 75) { value = 75; beep = 0; write_24c02(10,value); delay_1ms(200); write_24c02_8(6,0,password_r); delay_1ms(200); read_24c02_8(6,0,password); beep = 1; } } /****************按键功能处理********************/ void key_with() { static uchar value; if(key_can == 14) //手动关闭密码锁 relay = 1; if(menu_1 == 0) { if(key_can <= 9) if(menu_i < 6) //密码输入 { menu_i ++; if(menu_i > 6) menu_i = 6; smg_i = menu_i; for(i=6;i>0;i--) password_bj[i] = password_bj[i-1]; password_bj[0] = key_can; for(i=0;i<smg_i;i++) dis_smg[i] ='*';//0x30 + password_bj[i]; write_string(2,7,dis_smg); lcd1602_guanbiao(1,7 + menu_i + 0x40); //开光标 } if(key_can == 11) //密码删除 { for(i=0;i<menu_i;i++) password_bj[i] = password_bj[i+1]; menu_i --; password_bj[menu_i] = ' '; dis_smg[menu_i] = ' '; write_string(2,7,dis_smg); lcd1602_guanbiao(1,7 + menu_i