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#include<reg51.h>
#include<intrins.h>
sbit RS=P3^1;
sbit RW=P3^2;
sbit E=P3^3;
void lcd_w_cmd(unsigned char com);//寫命令字函數
void lcd_w_dat(unsigned char dat);//寫數據函數
unsigned char lcd_r_start();//讀狀態函數
void lcd_int();//LCD初始化函數
void delay(unsigned int i);//可控延時函數
void delay1();//實現延時函數
char keyscan();//鍵盤掃描
void puts(unsigned char ch[]);
void set_pw();
unsigned char codekey_code[]={0xee,0xde,0xbe,0x7e,0xed,0xdd,0xbd,0x7d,0xeb,0xdb,0xbb,0x7b,0xe7,0xd7,0xb7,0x77};
unsigned char pw[6]={0,0,0,0,0,0,};
unsigned char pwnew[10]={0,0,0,0,0,0,0,0,0,0};
sbit P30=P3^0;
void puts(unsigned char ch[])
{
unsigned char i;
i=0;
while(ch[i]!='\0')
{
lcd_w_dat(ch[i]);
i++;
}
}
void set_pw()
{
unsigned char key,count;
lcd_w_cmd(0x01);
puts("password setup:");
lcd_w_cmd(0xc0);
while(1)
{
key=keyscan();
if(key>=0&&key<=9)
{
lcd_w_dat(key+0x30);
pw[count]=key;
count++;
if(count==6)break;
P2=0xf0;
while(P2!=0xf0);}
}
}
void main()
{
unsigned char i,count;
bit pw_flag;
P1=0xff;
lcd_int();
delay(255);
lcd_w_cmd(0x80);
puts("password:");
count=0;
while(1)
{
i=keyscan();
if(i!=-1)
{
if(i>=0&&i<=9)
{
pwnew[count]=i;
lcd_w_dat(i+0x30);
count++;
P2=0xf0;
while(P2!=0xf0);}
else if(i==10)
{
pw_flag=1;
if(count!=6)
pw_flag=0;
else
{
for(i=0;i<6;i++)
{
if(pw[i]!=pwnew[i])
{
pw_flag=0;break;}
}
}
if(pw_flag==1)
{
lcd_w_cmd(0xc0);
puts("pass");
P30=0;
P2=0xf0;
while(P2!=0xf0);
while(1)
{
i=keyscan();
if(i!=-1)
break;
}
P2=0xf0;
while(P2!=0xf0);
if(i==11)set_pw();
}
else
{
lcd_w_cmd(0xc0);
P30=1;
puts("error");}
count=0;
delay(50000);
lcd_w_cmd(0x01);
puts("password:");
}}}}
char keyscan()
{
char scan1,scan2,keycode,j,key;
key=-1;
P2=0xf0;
scan1=P2;
if(scan1!=0xf0)
{
delay(1200);
scan1=P2;
if(scan1!=0xf0)
{
P2=0x0f;
scan2=P2;
keycode=scan1|scan2;
for(j=0;j<16;j++)
{
if(keycode==codekey_code[j])
{
key=j;break;}
}}}
return(key);
}
void delay1()
{
_nop_();
_nop_();
_nop_();
}
void lcd_int()
{
lcd_w_cmd(0x3c);
lcd_w_cmd(0x0e);
lcd_w_cmd(0x01);
lcd_w_cmd(0x06);
lcd_w_cmd(0x80);
}
unsigned char lcd_r_start()
{
unsigned char s;
RW=1;
delay1();
RS=0;
delay1();
E=1;
delay1();
s=P1;
delay1();
E=0;
delay1();
RW=0;
delay1();
return(s);
}
void lcd_w_cmd(unsigned char com)
{
unsigned char i;
do{
i=lcd_r_start();
i&=0x80;
delay(2);
}
while(i!=0);
RW=0;
delay1();
RS=0;
delay1();
E=1;
delay1();
P1=com;
delay1();
E=0;
delay1();
RW=1;
delay(255);
}
void lcd_w_dat(unsigned char dat)
{
unsigned char i;
do{
i=lcd_r_start();
i&=0x80;
delay(2);
}
while(i!=0);
RW=0;
delay1();
RS=1;
delay1();
E=1;
delay1();
P1=dat;
delay1();
E=0;
delay1();
RW=1;
delay(255);
}
void delay(unsigned int i)
{unsigned int k;
for(k=0;k<i;k++);
}
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