蓝桥杯单片机第十一届模拟题——智能门锁的程序以及设计思路

#include "intrins.h"

#define DELAY_TIME 5

#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1


sbit SDA = P2^1;  
sbit SCL = P2^0;  

void IIC_Delay(unsigned char i)
{
    do{_nop_();}
    while(i--);        
}

void IIC_Start(void)
{
    SDA = 1;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 0;
    IIC_Delay(DELAY_TIME);
    SCL = 0;	
}


void IIC_Stop(void)
{
    SDA = 0;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}


void IIC_SendAck(bit ackbit)
{
    SCL = 0;
    SDA = ackbit;  				
    IIC_Delay(DELAY_TIME);
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SCL = 0; 
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}


bit IIC_WaitAck(void)
{
    bit ackbit;
	
    SCL  = 1;
    IIC_Delay(DELAY_TIME);
    ackbit = SDA;
    SCL = 0;
    IIC_Delay(DELAY_TIME);
    return ackbit;
}

void IIC_SendByte(unsigned char byt)
{
    unsigned char i;

    for(i=0; i<8; i++)
    {
        SCL  = 0;
        IIC_Delay(DELAY_TIME);
        if(byt & 0x80) SDA  = 1;
        else SDA  = 0;
        IIC_Delay(DELAY_TIME);
        SCL = 1;
        byt <<= 1;
        IIC_Delay(DELAY_TIME);
    }
    SCL  = 0;  
}

unsigned char IIC_RecByte(void)
{
    unsigned char i, da;
    for(i=0; i<8; i++)
    {   
    	SCL = 1;
	IIC_Delay(DELAY_TIME);
	da <<= 1;
	if(SDA) da |= 1;
	SCL = 0;
	IIC_Delay(DELAY_TIME);
    }
    return da;    
}

#include<reg51.h>
#include<iic.c>
#define uchar unsigned char
#define uint unsigned int
sbit R1=P3^0;
sbit R2=P3^1;
sbit R3=P3^2;
sbit R4=P3^3;

sbit C1=P4^4;
sbit C2=P4^2;
sbit C3=P3^5;
sbit C4=P3^4;
unsigned char code shuzi[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0XBF,0XFF,0x86,0x8c,0xc8,0xc6};//前面是0-9，后面的16是-，17为全灭，18为E，19为P，20为n，21是大写的C
unsigned char code weizhi[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x00,0x00,0x00};//从左到右的数码管位置

int key[6]={17,17,17,17,17,17};//输入的数字数组
int key_edit[6]={17,17,17,17,17,17};//做修改的数字数组
int count=0;//用来统计按键共按了几次
int x=0;//就是用来进入按键模式的一个值，没啥意义
int password[6]={8,8,8,8,8,8};//这个是正确的密码
int minus=0;
uchar S7=0;//下面都是按键所代表的数值
uchar S11=1;
uchar S15=2;
uchar S19=3;
uchar S6=4;
uchar S10=5;
uchar S14=6;
uchar S18=7;
uchar S5=8;
uchar S9=9;
void input_fun();//输入功能
void edit_fun();//编辑功能
void write_eeprom(unsigned char add,unsigned char date);//写入eeprom数据，前面是地址，后面是数据
unsigned char read_eeprom(unsigned char add);//读eeprom的数据，括号里面写地址
void write_password();//保存修改的密码
void read_password();//给password密码数组赋值
void display_input();//显示输入的数字
void display_input_minus();//清除所有数字
void display_edit();//显示编辑密码的输入界面
void display_correct();//显示密码正确打开
void Init();//矩阵键盘的配置
void key_fun1(x);//第一行按键表示的数字
void key_fun2(x);//第二行按键表示的数字
void key_fun3(x);//第三行按键表示的数字，这么做是因为矩阵按键代码不能让某一个按键为低电平，所以分行检测
void Scan_keys1();//扫描第一行
void Scan_keys2();//扫描第二行
void Scan_keys3();//扫描第三行
void Scan_keys4();//扫描第四行
void Start();//开始进入输入状态
void delay_ms(int ms);//延时一毫秒
void shumaguan_control(uchar a,uchar b);//数码管显示函数，前面是位置，后面是数据
void allinit();//配置所有引脚
void allinit()//配置所有引脚
{
 P2=(P2&0x1f)|0x80;
 P0=0xff;
 P2&=0x1f;
 
 P2=(P2&0x1f)|0xA0;
 P0 = P0 & 0XAF; 
 P2&=0x1f;
 
 P2=(P2&0x1f)|0xc0;
 P0=0xff;
 P2&=0x1f;
 P2=(P2&0x1f)|0xe0;
 P0=0xFF;
 P2&=0x1f;
}
void shumaguan_control(uchar a,uchar b)//数码管显示函数，前面是位置，后面是数据
{
	delay_ms(1);
	P2=(P2&0X1f)|0xC0;P0=weizhi[a];
	P2=(P2&0X1f)|0xE0;P0=shuzi[b];
	delay_ms(1);
}
void delay_ms(int ms)//延时一毫秒
{
 int q,w;
 for(q = 0;q<ms;q++){
  for(w=845;w>0;w--);
 }
}
void write_eeprom(unsigned char add,unsigned char date)//写入eeprom数据，前面是地址，后面是数据
{
	IIC_Start();
	IIC_SendByte(0xa0);
	IIC_WaitAck();
	IIC_SendByte(add);
	IIC_WaitAck();
	IIC_SendByte(date);
	IIC_WaitAck();
	IIC_Stop();
}
unsigned char read_eeprom(unsigned char add)//读eeprom的数据，括号里面写地址
{
	unsigned char temp;
	EA = 0;
	IIC_Start();
	IIC_SendByte(0xa0);
	IIC_WaitAck();
	IIC_SendByte(add);
	IIC_WaitAck();

	IIC_Start();
	IIC_SendByte(0xa1);
	IIC_WaitAck();
	temp = IIC_RecByte();
	IIC_SendAck(1);
	IIC_WaitAck();
	IIC_Stop();
	EA = 1;
	return temp;
}
void write_password()//保存修改的密码
{
	write_eeprom(0x00,key_edit[0]);
		delay_ms(10);//如果不delay10秒就会出错，我也不知道为啥
	write_eeprom(0x01,key_edit[1]);
		delay_ms(10);
	write_eeprom(0x02,key_edit[2]);
		delay_ms(10);
	write_eeprom(0x03,key_edit[3]);
		delay_ms(10);
	write_eeprom(0x04,key_edit[4]);
		delay_ms(10);
	write_eeprom(0x05,key_edit[5]);
		delay_ms(10);
}
void read_password()//给password密码数组赋值
{
	password[0]=read_eeprom(0x00);
	delay_ms(10);
	password[1]=read_eeprom(0x01);
	delay_ms(10);
	password[2]=read_eeprom(0x02);
	delay_ms(10);
	password[3]=read_eeprom(0x03);
	delay_ms(10);
	password[4]=read_eeprom(0x04);
	delay_ms(10);
	password[5]=read_eeprom(0x05);
	delay_ms(10);
}
void display_input()//显示输入的数字
{
	P2=0x80;P0=0xbf;
	shumaguan_control(7,key[0]);
	shumaguan_control(6,key[1]);
	shumaguan_control(5,key[2]);
	shumaguan_control(4,key[3]);
	shumaguan_control(3,key[4]);
	shumaguan_control(2,key[5]);
	shumaguan_control(0,16);//最左边的-
}
void display_input_minus()//清除所有数字
{

	key[0]=key[1]=key[2]=key[3]=key[4]=key[5]=17;
	count=0;//从0开始
}
void display_edit()//显示编辑密码的输入界面
{
	P2=0x80;P0=0x7f;//L8亮灯
	key_edit[0]=key[0];
	key_edit[1]=key[1];
	key_edit[2]=key[2];
	key_edit[3]=key[3];
	key_edit[4]=key[4];
	key_edit[5]=key[5];
	shumaguan_control(0,21);
	shumaguan_control(7,key_edit[0]);
	shumaguan_control(6,key_edit[1]);
	shumaguan_control(5,key_edit[2]);
	shumaguan_control(4,key_edit[3]);
	shumaguan_control(3,key_edit[4]);
	shumaguan_control(2,key_edit[5]);
}
void display_correct()//显示密码正确打开
{
	shumaguan_control(0,0);
	shumaguan_control(4,0);
	shumaguan_control(5,19);
	shumaguan_control(6,18);
	shumaguan_control(7,20);
}
void Init()//矩阵按键配置
{
	R1=R2=R3=R4=1;
	C1=C2=C3=C4=1;
}
void key_fun1(x)//第一行按键表示的数字
{
	switch(count)
	{
		case 0:	key[0]=x;
						break;
		case 1: key[1]=key[0];
						key[0]=x;
						break;
		case 2: key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 3:	key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 4:	key[4]=key[3];
						key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 5:	key[5]=key[4];
						key[4]=key[3];
						key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		default: ;
						
	}
}
void key_fun2(x)//第二行表示的数字
{
	switch(count)
	{
		case 0:	key[0]=x;
						break;
		case 1: key[1]=key[0];
						key[0]=x;
						break;
		case 2: key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 3:	key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 4:	key[4]=key[3];
						key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 5:	key[5]=key[4];
						key[4]=key[3];
						key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		default: ;
						
	}
}
void key_fun3(x)//第三行表示的数字
{
	switch(count)
	{
		case 0:	key[0]=x;
						break;
		case 1: key[1]=key[0];
						key[0]=x;
						break;
		case 2: key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 3:	key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 4:	key[4]=key[3];
						key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		case 5:	key[5]=key[4];
						key[4]=key[3];
						key[3]=key[2];
						key[2]=key[1];
						key[1]=key[0];
						key[0]=x;
						break;
		default: ;
						
	}
}
void Scan_keys1()//扫描第一行，记得按键一定要防抖
{
	C1 = C2 = C4 = 1;
	if(C1 == 0)
	{
		delay_ms(50);
		if(C1 == 0)
		{
			if(R1==0) key_fun1(S7);
			count++;
			
		}
		while(C1 == 0);
	}
	else if(C2 == 0)
	{
		delay_ms(50);
		if(C2 == 0)
		{
				if(R1==0) key_fun1(S11);
				count++;
			
		}
		while(C2 == 0);
	}
	else if(C3 == 0)
	{
	delay_ms(50);
		if(C3 == 0)
		{
				if(R1==0) key_fun1(S15);
				count++;
			
		}
		while(C3 == 0);
	}
	else if(C4 == 0)
	{
		delay_ms(50);
		if(C4 == 0)
		{
				if(R1==0) key_fun1(S19);
				count++;
			
		}
		while(C4 == 0);
	}
}
void Scan_keys2()//扫描第二行
{
	C1 = C2 = C3 = C4 = 1;
	if(C1 == 0)
	{
		delay_ms(50);
		if(C1 == 0)
		{
				if(R2==0) key_fun2(S6);
				count++;
		}
		while(C1 == 0);
	}
	else if(C2 == 0)
	{
		delay_ms(50);
		if(C2 == 0)
		{
				if(R2==0) key_fun2(S10);
				count++;
		}
		while(C2 == 0);
	}
	else if(C3 == 0)
	{
	delay_ms(50);
		if(C3 == 0)
		{
				if(R2==0) key_fun2(S14);
				count++;
		}
		while(C3 == 0);
	}
	else if(C4 == 0)
	{
		delay_ms(50);
		if(C4 == 0)
		{
				if(R2==0) key_fun2(S18);
				count++;
		}
		while(C4 == 0);
	}
}
void Scan_keys3()//扫描第三行
{
	C1 = C2  = C4 = 1;
	if(C1 == 0)
	{
		delay_ms(50);
		if(C1 == 0)
		{
			if(R3==0) key_fun3(S5);
			count++;
		}
		while(C1 == 0);
	}
	else if(C2 == 0)
	{
		delay_ms(50);
		if(C2 == 0)
		{
			  if(R3==0) key_fun3(S9);
				count++;
		
		}
		while(C2 == 0);
	}
	else if(C3 == 0)
	{
		delay_ms(50);
		if(C3 == 0)
		{
			  
					P2=0x00;
		
		}
		while(C3 == 0);
	}
	else if(C4 == 0)
	{
		delay_ms(50);
		if(C4 == 0)
		{
			  
					P2=0x00;
		
		}
		while(C4 == 0);
	}

}
void Scan_keys4()//扫描第四行
{
	C1 = C2 = C3 = C4 = 1;
	if(C1 == 0)
	{
		delay_ms(50);
		if(C1 == 0)
		{
			
		}
		while(C1 == 0);
	}
	else if(C2 == 0)
	{
		delay_ms(50);
		if(C2 == 0)
		{
			if(R4==0)
			{
				display_input_minus();
			}
		}
		while(C2 == 0);
	}
	else if(C3==0)
	{
		while(C3 == 0);
	}
	else if(C4==0)
	{
		delay_ms(50);
		if(C4 == 0)
		{
				if(R4==0)
				{					
					if(key[0]==password[0]&&key[1]==password[1]&&key[2]==password[2]&&key[3]==password[3]&&key[4]==password[4]&&key[5]==password[5])//判定代码正确，每一位都相等
					{
						
						int i=500;//延时5s
						while(--i)
						{
								display_correct();
							
							if(C3==0)//如果S12按下，进入编辑状态
											{
												delay_ms(50);
													R1=R2=R3=1;
												if(C3==0)
													{
															
														display_input_minus();			
														while(1)
														{
															edit_fun();
															
															if(C3==0)
															{
																write_password();//写入eeprom密码
																delay_ms(10);
																read_password();//读取eeprom密码
																break;
															}
														}
														while(C3==0);
													}
														
											}
												display_input_minus();
										}
									}
							
							
						
					else //如果密码不正确，清零等5s跳出循环
					{
						display_input_minus();
								while(1)
								{
								P2=0x80;P0=0xfe;
								delay_ms(5000);
								break;
								}
					}
				}
		}
		while(C4 == 0);
	}
}
void Start()//开始进入输入状态
{
	R4=0;
	if(C4 == 0&&R4==0)//按下S16进入输入状态，且不能影响其他的行的电平，就只能这么判断
	{
		delay_ms(50);
		if(C4 == 0&&R4==0)
		{
			while(C4 == 0);
			while(1)
			{
				Init();
				input_fun();
			}
		}
		
	}
}
void input_fun()//输入模式
{		
		
		R1=0;
		Scan_keys1();
		R2=0;
		Scan_keys2();
		R3=0;
		Scan_keys3();
		R4=0;
		Scan_keys4();
		display_input();

}
void edit_fun()//编辑模式
{
		R1=0;
		R2=R3=R4=1;
		Scan_keys1();
		R2=0;
		R1=R3=R4=1;
		Scan_keys2();
		R3=0;
		R1=R2=R4=1;
		Scan_keys3();
		R4=0;
		R1=R2=R3=1;
		Scan_keys4();
		display_edit();

}
void main()//主函数
{
	while(1)
	{
		allinit();
		Init();
		Start();
	}
}