用24c04与1602液晶屏设计的简易加密电子锁程序+原理图+仿真下载 -

#include"LCD1602.h"
#include"AT24C04.h"
//上次按键和当前按键序号，该矩阵中序号范围为0~15，16表示无按键
INT8U Key_Value = 0xFF, Pre_KeyNo = 0xFF;
INT8U DSY_BUFFER[10]= ""; //显示缓冲区
INT8U UserPassword[7]; //用户输入密码
INT8U I2C_Password[7]; //从I2C存储器读取的密码
sbit LED_OPEN = P2^7; //开锁亮灯
sbit BEEP = P3^7; //蜂鸣器
void Beep();
void Clear_Pwd();
void Read_I2C_Pwd();
void Write_I2C_Pwd();
void Keys_Scan();
//----------主程序------------
void main()
{
INT8U i = 0;
INT8U IS_Valid_User = 0;
P0 = 0xFF; P1 = 0xFF; P2 = 0xFF;
Delay_ms(10);
Init_LCD(); //初始化LCD
Write_LCD_String(0, 0, "Your Password...");
Read_I2C_Pwd(); //将密码读入I2C
while(1)
{
P1 = 0x0F;
while(P1 == 0x0F); Keys_Scan();
Pre_KeyNo = Key_Value; //扫描键盘获取键序号
switch(Pre_KeyNo)
{
case 0: case 1: case 2: case 3: case 4:
case 5: case 6: case 7: case 8: case 9:
if(i <= 5)
{
//如果i为0则执行一次清屏
if(i == 0) Write_LCD_String(1, 0, " ");
UserPassword[i] = Pre_KeyNo + '0';
UserPassword[i+1] = '\0';
DSY_BUFFER[i] = '*';
DSY_BUFFER[i+1] = '\0'; i++;
Write_LCD_String(1, 0,DSY_BUFFER );
} break;
case 10: //按A键开锁
Read_I2C_Pwd(); //从I2C存储器读回密码
if(strcmp(UserPassword,I2C_Password) == 0)
{
LED_OPEN = 0; //点亮LED
Clear_Pwd();
Write_LCD_String(1, 0, "Unlock OK! ");
IS_Valid_User = 1;
}
else
{
LED_OPEN = 1; //关闭LED
Clear_Pwd();
Write_LCD_String(1, 0, "ERROR ! ");
IS_Valid_User = 0;
}
i = 0; break;
case 11: //按B键上锁
LED_OPEN = 1;
Clear_Pwd();
Write_LCD_String(0, 0, "Your Password... ");
Write_LCD_String(1, 0, " ");
i = 0; IS_Valid_User = 0; break;
case 12: //按C键设置新密码
//如果是合法用户则提示输入新密码
if(!IS_Valid_User)
Write_LCD_String(1, 0, "No right ! ");
else
{
i = 0; //密码输入缓冲索引归零
Write_LCD_String(0, 0, "New Password:... ");
Write_LCD_String(1, 0, " ");
} break;
case 13: //按D键保存新密码
if(!IS_Valid_User)
Write_LCD_String(1, 0, "No right ! ");
else
{
//写入新设置的密码，并重新读回
Write_I2C_Pwd(); Delay_ms(5); Read_I2C_Pwd();
i = 0; //密码输入缓冲索引归零
Write_LCD_String(0, 0, "Your Password ... ");
Write_LCD_String(1, 0, "Password Saved ! ");
} break;
case 14: //按E键消除所有输入
i = 0; Clear_Pwd();
Write_LCD_String(0, 0, "Your Password... ");
Write_LCD_String(1, 0, " ");
}
Beep(); Delay_ms(100);
while(P1 != 0xF0); //如果有键未释放则等待
}
}
//-----------蜂鸣器子程序------------
void Beep()
{
INT8U i;
for(i = 0; i < 100; i++)
{
Delay_ms(1);
BEEP = ~BEEP;
}
BEEP = 0;
}
//------------清除密码--------------
void Clear_Pwd()
{
UserPassword[0] = '\0';
DSY_BUFFER[0]='\0';
}
//----------读取密码字符串（以'\0'为结束标志）----------
void Read_I2C_Pwd()
{
INT8U i = -1; //只限于读取存储器前半部分
do { i++; I2C_Password[i] = Random_Read(0xA0,(INT16U)i); }
while(I2C_Password[i] != '\0' && i < 6);
//如果循环结束后未遇到结束标志，则直接在字符串末尾补上结束标志
if(I2C_Password[i] != '\0') I2C_Password[i] = '\0';
}
//----------写密码字符串(结束标志'\0'注意一并写入)---------
void Write_I2C_Pwd()
{
INT8U i = 0;
//循环写入密码字符，字符串末尾的'\0'也要写入，最多7个字符
while(i <= 6)
{
Random_Write(0xA0, i,UserPassword[i]); Delay_ms(5);
if(UserPassword[i] == '\0') break;
i++;
}
//如果循环结束时密码字符串末尾未遇到'\0'则直接向I2C补充写入'\0'
if(UserPassword[i] != '\0') Random_Write(0xA0, i,'\0');
}
//-----------------键扫描------------------------------------
void Keys_Scan()
{
/*列判断*/
P1 = 0x0F; Delay_ms(1);
if(P1 == 0x0F)
{
Key_Value = 0xFF; return;
}
switch(P1)
{
case 0x0E: Key_Value = 0; break;
case 0x0D: Key_Value = 1; break;
case 0x0B: Key_Value = 2; break;
case 0x07: Key_Value = 3; break;
default : Key_Value = 0xFF; return;
}
/*行判断*/
P1 = 0xF0; Delay_ms(1);
switch(P1)
{
case 0xE0: Key_Value += 0; break;
case 0xD0: Key_Value += 4; break;
case 0xB0: Key_Value += 8; break;
case 0x70: Key_Value += 12; break;
default : Key_Value = 0xFF;
}
}

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