我就是這樣接的只不過我接的5k電阻
#include<reg51.h>
#include<string.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define LCDIO P0
//#define delay4us() _nop_();_nop_();_nop_();_nop_();
uchar buffer[6]={0};
sbit sda=P3^7;
sbit scl=P3^6;
sbit beep=P2^7;
sbit jdq=P2^6;
bit flag=0,aa; //用戶蹲淵義定時溢出標志位
uchar DSY_BUFFER[16]=" ";
uchar DSY_BUFFER1[16]=" ";
uchar Userpassword[6]={0};
sbit rs=P2^0;
sbit rd=P2^1;
sbit lcden=P2^2;
uchar code table2[]="123456";
uchar code table[]="Your Password...";
void delayms(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com)
{
rs=0;
rd=0;
lcden=0;
P0=com;
delayms(5);
lcden=1;
delayms(5);
lcden=0;
}
void write_date(uchar date)
{
rs=1;
rd=0;
lcden=0;
P0=date;
delayms(5);
lcden=1;
delayms(5);
lcden=0;
}
void Display_String(uchar *p,uchar com)
{ uchar i;
write_com(com);
for(i=0;i<16;i++)
{
write_date(p);
}
}
void init_lcd()
{
lcden=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
Display_String(table,0x80);
Display_String("It is Locked! ",0xc0);
}
//**************************************//I2C通信協議
void nop()
{
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
}
void start()//開始信號
{
sda=1;
nop();
scl=1;
nop();
sda=0;
nop();
}
void stop()//停止
{
sda=0;
nop();
scl=1;
nop();
sda=1;
nop();
}
void respons()//應答
{
unsigned char i;
scl=1;
nop();
while((sda==1)&&(i<250))
{
i++;
}
scl=0;
nop();
}
void init()//初始化函數
{
sda=1;
scl=1;
}
void write_byte(unsigned char dat)//寫一字節
{
unsigned char i;
scl=0;
for(i=0;i<8;i++)
{
dat=dat<<1;
sda=CY;
scl=1;
nop();
scl=0;
nop();
}
}
unsigned char read_byte()//讀取一字節
{
unsigned char i,k;
for(i=0;i<8;i++)
{
scl=1;
nop();
k=(k<<1)|sda;
scl=0;
nop();
}
return k;
}
void write(unsigned char address,unsigned char dat)//向AT24C02地址中寫數據
{
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
write_byte(dat);
respons();
stop();
}
unsigned char read(unsigned char address)//從AT24C02地址中讀出數據
{
unsigned char dat;
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
start();
write_byte(0xa1);
respons();
dat=read_byte();
stop();
return dat;
}
//**************************************//
void clear_password()
{ uchar i;
for(i=0;i<6;i++)
{
Userpassword=' ';
}
for(i=0;i<16;i++)
{
DSY_BUFFER=' ';
}
}
uchar Keys_Scan()
{
uchar temp,keynum;
P1=0x0F;
delayms(5);
temp=P1^0x0F;
switch(temp)
{
case 1:keynum=0;break;
case 2:keynum=1;break;
case 4:keynum=2;break;
case 8:keynum=3;break;
break;
}
P1=0xF0;
delayms(5);
temp=P1>>4^0x0F;
switch(temp)
{
case 1:keynum+=0;break;
case 2:keynum+=4;break;
case 4:keynum+=8;break;
case 8:keynum+=12;break;
break;
}
delayms(600);
return keynum;
}
void main()
{ uchar temp,i=0,j=0,k=0,n;
uchar IS_valid_user;
beep=1;
init();
init_lcd();
delayms(5);
write(0x00,table2[0]);
delayms(10);
write(0x01,table2[1]);
delayms(10);
write(0x02,table2[2]);
delayms(10);
write(0x03,table2[3]);
delayms(10);
write(0x04,table2[4]);
delayms(10);
write(0x05,table2[5]);
delayms(10);
buffer[0]=read(0x00);
delayms(10);
buffer[1]=read(0x01);
delayms(10);
buffer[2]=read(0x02);
delayms(10);
buffer[3]=read(0x03);
delayms(10);
buffer[4]=read(0x04);
delayms(10);
buffer[5]=read(0x05);
delayms(10);
P1=0x0f;
while(1)
{
if(P1!=0x0f)
{
temp=Keys_Scan();
switch(temp)
{
case 0: case 1: case 2: case 3: case 4:
case 5: case 6: case 7: case 8: case 9:
if (i<=5) //密碼限制在6位以內
{
Userpassword=temp;
DSY_BUFFER='*';
Display_String(DSY_BUFFER,0xc0);
i++;
}
break;
case 10: //按A鍵開鎖
for(k=0;k<=5;k++)
{ flag=flag&&(buffer[k]==Userpassword[k]);}
if (flag)
{ flag=0;
i=0;
jdq=0; //點亮LED
clear_password();
Display_String("OPEN OK! ",0xc0);
IS_valid_user = 1;
j=0;
}
else
{
j++;
jdq=1; //關閉LED
clear_password();
Display_String("ERROR!Have try ",0xc0);
write_com(0xcf);
write_date(0x30+j);
IS_valid_user=0;
}
i=0;
break;
case 11: //按B鍵上鎖
jdq=1;
clear_password();
Display_String(table,0x80);
Display_String("Lock OK! ",0xc0);
i=0;
IS_valid_user=0;
break;
case 12: //按C鍵設置新密碼
//如果是合法用戶則提示輸入新密碼
if ( !IS_valid_user)
{
i=0;
Display_String("No rights ! ",0xc0);
delayms(1000);
Display_String("Your Password...",0x80);
Display_String("Lock OK! ",0xc0);
}
else
{
i=0;
Display_String("New Password: ",0x80);
Display_String(" ",0xc0);
}
break;
case 13: //按D鍵保存新密碼
if ( !IS_valid_user)
{ i=0;
Display_String("No rights ! ",0xc0);
delayms(1000);
Display_String("Your Password...",0x80);
Display_String("Lock OK! ",0xc0);
}
else
{i = 0;
init();
delayms(5);
for(k=0;k<6;k++)
{
Userpassword[k]=Userpassword[k];
}
write(0x00,Userpassword[0]);
delayms(10);
write(0x01,Userpassword[1]);
delayms(10);
write(0x02,Userpassword[2]);
delayms(10);
write(0x03,Userpassword[3]);
delayms(10);
write(0x04,Userpassword[4]);
delayms(10);
write(0x05,Userpassword[5]);
delayms(10);
buffer[0]=read(0x00);
delayms(10);
buffer[1]=read(0x01);
delayms(10);
buffer[2]=read(0x02);
delayms(10);
buffer[3]=read(0x03);
delayms(10);
buffer[4]=read(0x04);
delayms(10);
buffer[5]=read(0x05);
delayms(10);
clear_password();
Display_String(table,0x00);
Display_String("Password Saved! ",0xc0);
delayms(1000);
Display_String("Do lock agian ? ",0xc0);
}
break;
case 14: //按E鍵消除所有輸入
i=0;
clear_password();
Display_String(" ",0xc0);
break;
case 15: //清除一位
if(i!=0)i--;
for(n=0;n<i;n++)
{
DSY_BUFFER1[n]='*';
}
Display_String(DSY_BUFFER1,0xc0);
}
P1=0x0f;
}
if(j==3)
{ Display_String("THIEF!!!THIEF!!!",0xc0);
j=0;
beep=0;
}
}
}
這是全部程序，改完了以后輸入123456也不對輸入000000也不對了 |
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