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/********************************************************************************
* 描述：密碼鎖示例
* 備注：
* 1、用0～9的數(shù)字鍵輸入密碼，允許的密碼最大位數(shù)由PSW_MAX_LEN宏定義給出
* 2、用戶設(shè)定的密碼由EEPROM保存，并且用“累加和”校驗來保證數(shù)據(jù)的有效性
* 3、程序首次運(yùn)行時EEPROM中的數(shù)據(jù)無效，此時會提示“設(shè)置密碼”
* 4、設(shè)置密碼時需要用戶輸入兩次相同的密碼，以保證設(shè)置成功，設(shè)置后密碼自動保存
* 5、兩次輸入密碼不相同時，將導(dǎo)致密碼設(shè)置失敗，按回車鍵重新設(shè)置
* 6、密碼設(shè)置成功后，每次開機(jī)都會要求用戶輸入密碼，用戶鍵入密碼后，按回車鍵，
系統(tǒng)將鍵入的密碼與EEPROM中保存的密碼做對比，相同則系統(tǒng)解鎖，否則繼續(xù)鎖定
* 7、密碼輸入錯誤系統(tǒng)鎖定時，按回車鍵可以重新開始輸入密碼
* 8、密碼輸入正確系統(tǒng)解鎖時，按回車鍵可以進(jìn)入修改密碼的操作
* 9、當(dāng)忘記密碼時，可通過修改PSW_MAX_LEN或PSW_SAVE_ADDR宏定義的值來重置密碼
********************************************************************************/
#include <reg52.h>
#define PSW_MAX_LEN 13 //用宏定義出密碼最大長度（最大不超過16）
#define PSW_SAVE_ADDR 0x30 //用宏定義出密碼在EEPROM中的保存地址
sbit LED = P1^0;
sbit OPEN = P2^7;
unsigned char status = 0; //系統(tǒng)狀態(tài)字：0-輸入密碼，1-設(shè)置密碼，2-設(shè)置密碼確認(rèn)，
//3-密碼設(shè)置失敗，4-輸入的密碼正確，5-輸入的密碼錯誤
unsigned char PswCnt; //當(dāng)前輸入密碼位數(shù)的計數(shù)器
unsigned char PswSet[PSW_MAX_LEN]; //已設(shè)定的密碼數(shù)據(jù)
unsigned char PswBuf1[PSW_MAX_LEN]; //密碼輸入緩沖區(qū)1
unsigned char PswBuf2[PSW_MAX_LEN]; //密碼輸入緩沖區(qū)2
unsigned char T0RH = 0; //T0重載值的高字節(jié)
unsigned char T0RL = 0; //T0重載值的低字節(jié)
unsigned char code s0[][32]= {
/*-- 文字: 請 --*/
/*-- 宋體12; 此字體下對應(yīng)的點陣為：寬x高=16x16 --*/
0x40,0x42,0xCC,0x00,0x00,0x44,0x54,0x54,0x54,0x7F,0x54,0x54,0x54,0x44,0x40,0x00,
0x00,0x00,0x7F,0x20,0x10,0x00,0xFF,0x15,0x15,0x15,0x55,0x95,0x7F,0x00,0x00,0x00,
/*-- 文字: 輸 --*/
/*-- 宋體12; 此字體下對應(yīng)的點陣為：寬x高=16x16 --*/
0x88,0x68,0x1F,0xC8,0x08,0x10,0xC8,0x54,0x52,0xD1,0x12,0x94,0x08,0xD0,0x10,0x00,
0x09,0x19,0x09,0xFF,0x05,0x00,0xFF,0x12,0x92,0xFF,0x00,0x5F,0x80,0x7F,0x00,0x00,
…………限于本文篇幅余下代碼請從51黑下載附件…………
/*-- 文字: 開 --*/
/*-- 宋體12; 此字體下對應(yīng)的點陣為：寬x高=16x16 --*/
0x80,0x82,0x82,0x82,0xFE,0x82,0x82,0x82,0x82,0x82,0xFE,0x82,0x82,0x82,0x80,0x00,
0x00,0x80,0x40,0x30,0x0F,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,
};
unsigned char code s1[][16] = {
0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00, //*
};
bit flagOPEN = 0;
extern bit flagLED;
extern void KeyScan();
extern void KeyDriver();
extern void LCD_ST7567_INIT();
extern void Lcd12864_ON();
extern void Lcd12864_OFF();
extern void Lcd12864_ClearScreen();
extern void displayPhoto (unsigned char *pic);
extern void z1616(unsigned char plat, unsigned char column, unsigned char p);
extern void WRITE_STRING816(unsigned char plat, unsigned char column, unsigned char p, unsigned char x0[][16], unsigned char c);
extern void E2Read(unsigned char *buf, unsigned char addr, unsigned char len);
extern void E2Write(unsigned char *buf, unsigned char addr, unsigned char len);
void InputCode();
void SetCode();
void DelayM(int ms);
bit ReadPassword();
void ConfigTimer0(unsigned int ms);
void FillMemory(unsigned char *dest, unsigned char byt, unsigned char len);
void main()
{
EA = 1; //開總中斷
ConfigTimer0(1); //配置T0定時1ms
LCD_ST7567_INIT(); //初始化液晶
if (ReadPassword()) //讀取密碼并判斷是否有效
{
InputCode(); //有效時提示”請輸入密碼“
status = 4;
}
else
{
SetCode(); //提示”請設(shè)置密碼“
}
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
FillMemory(PswBuf2, '\0', PSW_MAX_LEN);
PswCnt = 0;
while(1)
{
KeyDriver();
if(flagLED)
{
LED = 0;
Lcd12864_ON();
}
else if(flagOPEN)
{
flagOPEN = 0;
Lcd12864_OFF();
LED = 1;
}
else if(status ==5)
{
Lcd12864_ClearScreen();
InputCode();
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
PswCnt = 0;
status = 0;
}
}
}
void SetCode()
{
z1616(1, 16, 0);
z1616(1, 32, 5);
z1616(1, 48, 6);
z1616(1, 64, 3);
z1616(1, 80, 4);
}
void InputCode()
{
z1616(1,16,0);
z1616(1,32,1);
z1616(1,48,2);
z1616(1,64,3);
z1616(1,80,4);
}
void DelayM(int ms)
{//延時函數(shù) 1MS/次
unsigned char i;
while( --ms != 0)
{
for(i = 0; i < 125; i++); //一個 ; 表示空語句,CPU空轉(zhuǎn)。
} //i 從0加到125，CPU大概就耗時1毫秒
}
/* 將一段內(nèi)存數(shù)據(jù)拷貝到另一處，dest-目的地址，src-源地址，len-數(shù)據(jù)長度 */
void CopyMemory(unsigned char *dest, unsigned char *src, unsigned char len)
{
while (len--)
{
*dest++ = *src++;
}
}
/* 用一個指定字節(jié)填充一段內(nèi)存，dest-目的地址，byt-填充用字節(jié)，len-數(shù)據(jù)長度 */
void FillMemory(unsigned char *dest, unsigned char byt, unsigned char len)
{
while (len--)
{
*dest++ = byt;
}
}
/* 內(nèi)存比較函數(shù)，比較兩個指針?biāo)赶虻膬?nèi)存數(shù)據(jù)是否相同，
ptr1-待比較指針1，ptr2-待比較指針2，len-待比較長度
返回值-兩段內(nèi)存數(shù)據(jù)完全相同時返回1，不同返回0 */
bit CmpMemory(unsigned char *ptr1, unsigned char *ptr2, unsigned char len)
{
while (len--)
{
if (*ptr1++ != *ptr2++) //遇到不相等數(shù)據(jù)時即刻返回0
{
return 0;
}
}
return 1; //比較完全部長度數(shù)據(jù)都相等則返回1
}
/* 將一段數(shù)據(jù)按字節(jié)累加，返回獲得的累加和，dat-數(shù)據(jù)指針，len-數(shù)據(jù)長度 */
unsigned char GetChkSum(unsigned char *dat, unsigned char len)
{
unsigned char sum = 0;
while (len--)
{
sum += *dat++;
}
return sum;
}
/* 從EEPROM中讀取保存的密碼數(shù)據(jù)，并對密碼進(jìn)行“累加和”校驗，
返回值-校驗通過返回 1，否則返回 0 */
bit ReadPassword()
{
unsigned char sum;
unsigned char buf[PSW_MAX_LEN+1];
E2Read(buf, PSW_SAVE_ADDR, PSW_MAX_LEN+1); //讀取密碼數(shù)據(jù)和校驗字節(jié)
sum = GetChkSum(buf, PSW_MAX_LEN); //計算密碼數(shù)據(jù)的累加和
if (buf[PSW_MAX_LEN] == ~sum) //校驗通過，即密碼有效時，拷貝密碼
{
CopyMemory(PswSet, buf, PSW_MAX_LEN);
return 1;
}
else //密碼數(shù)據(jù)無效時，緩沖區(qū)默認(rèn)成全0
{
FillMemory(PswSet, '\0', PSW_MAX_LEN);
return 0;
}
}
/* 將當(dāng)前的密碼數(shù)據(jù)保存到EEPROM中，同時添加校驗字節(jié) */
void SavePassword()
{
unsigned char buf[PSW_MAX_LEN+1];
CopyMemory(buf, PswSet, PSW_MAX_LEN); //復(fù)制密碼數(shù)據(jù)到緩沖區(qū)中
buf[PSW_MAX_LEN] = ~GetChkSum(buf, PSW_MAX_LEN); //填充最后的累加和校驗字節(jié)
E2Write(buf, PSW_SAVE_ADDR, PSW_MAX_LEN+1); //將密碼數(shù)據(jù)保存到EEPROM中
}
/* 在液晶上顯示與當(dāng)前輸入密碼位數(shù)相同的*，以指示當(dāng)前輸入的密碼位數(shù) */
void ShowPswCnt()
{
/* unsigned char buf[PSW_MAX_LEN+1];
FillMemory(buf, '*', PswCnt);
FillMemory(buf+PswCnt, '\0', sizeof(buf)-PswCnt);
LcdShowStr(0, 1, buf); */
WRITE_STRING816(2, PswCnt, 0, s1, 0);
}
/* 數(shù)字鍵動作函數(shù)，keycode-數(shù)字按鍵的ASCII值 */
void KeyNumAction(unsigned char keycode)
{
switch (status)
{
case 0: //輸入密碼狀態(tài)時，將輸入字符填充到PswBuf1
if (PswCnt < PSW_MAX_LEN)
{
PswBuf1[PswCnt] = keycode;
PswCnt++;
ShowPswCnt();
}
break;
case 1: //設(shè)置密碼狀態(tài)時，將輸入字符填充到PswBuf1
if (PswCnt < PSW_MAX_LEN)
{
PswBuf1[PswCnt] = keycode;
PswCnt++;
ShowPswCnt();
}
break;
case 2: //設(shè)置密碼確認(rèn)狀態(tài)時，將輸入字符填充到PswBuf2
if (PswCnt < PSW_MAX_LEN)
{
PswBuf2[PswCnt] = keycode;
PswCnt++;
ShowPswCnt();
}
break;
default: //其它狀態(tài)不予響應(yīng)
break;
}
}
/* 回車鍵動作函數(shù) */
void KeyEnterAction()
{
switch (status)
{
case 0: //檢查輸入的密碼是否正確
Lcd12864_ClearScreen();
if (CmpMemory(PswSet, PswBuf1, PSW_MAX_LEN))
{ //正確時顯示解鎖的提示
// LcdShowStr(0, 0, "Password Correct");
z1616(1,16,3);
z1616(1,32,4);
z1616(1,48,7); //提示 ”密碼正確“
z1616(1,64,8);
z1616(2, 64, 14);
z1616(2, 80, 13);
z1616(2, 96, 17);
z1616(2, 112, 18); //提示 ”鎖已打開“
OPEN = 0;
DelayM(2000);
OPEN = 1;
status = 5; //準(zhǔn)備下次密碼輸入狀態(tài)
}
else
{ //錯誤時顯示已鎖定的提示
// LcdShowStr(0, 0, "Password Wrong");
// LcdShowStr(0, 1, "system locked");
z1616(1, 16, 3);
z1616(1, 32, 4);
z1616(1, 48, 9); //提示”密碼錯誤“
z1616(1, 64, 10);
/* z1616(2, 0, 11);
z1616(2, 16, 12);
z1616(2, 32, 13);
z1616(2, 48, 14); //提示”系統(tǒng)已鎖“ */
status = 5; //進(jìn)入鎖定狀態(tài)
DelayM(2000);
}
break;
case 1: //進(jìn)入密碼設(shè)置的確認(rèn)步驟，即再輸入一次密碼
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Confirm Password");
z1616(1, 16, 0);
z1616(1, 32, 15);
z1616(1, 48, 16);
z1616(1, 64, 1);
z1616(1, 80, 2);
z1616(1, 96, 3); //提示”請再次輸入密碼“
z1616(1, 112, 4);
PswCnt = 0;
status = 2;
break;
case 2: //檢查兩次輸入的密碼是否一致
Lcd12864_ClearScreen();
if (CmpMemory(PswBuf1, PswBuf2, PSW_MAX_LEN))
{ //一致時保存設(shè)置的密碼
// LcdShowStr(0, 0, "Enter Password");
InputCode(); //提示”請輸入密碼“
CopyMemory(PswSet, PswBuf1, PSW_MAX_LEN);
SavePassword();
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
PswCnt = 0;
status = 0; //進(jìn)入密碼輸入狀態(tài)
}
else
{ //不一致時提示密碼設(shè)置錯誤
/* LcdShowStr(0, 0, "Confirm Password");
z1616(1, 0, 0);
z1616(1, 16, 15);
z1616(1, 32, 16);
z1616(1, 48, 1);
z1616(1, 64, 2);
z1616(1, 80, 3);
z1616(1, 90, 4); //提示”請再次輸入密碼“
// LcdShowStr(0, 1, "Failed"); */
z1616(1, 16, 3);
z1616(1, 32, 4);
z1616(1, 48, 5);
z1616(1, 64, 6);
z1616(1, 80, 9); //提示”密碼設(shè)置錯誤“
z1616(1, 96, 10);
status = 3; //進(jìn)入密碼設(shè)置錯誤狀態(tài)
}
break;
case 3: //重新提示設(shè)置密碼，進(jìn)入密碼設(shè)置狀態(tài)
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Set Password");
SetCode(); //提示”請設(shè)置密碼“
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
FillMemory(PswBuf2, '\0', PSW_MAX_LEN);
PswCnt = 0;
status = 1;
break;
case 4: //重新設(shè)置即修改密碼
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Set Password");
SetCode(); //提示”請設(shè)置密碼“
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
FillMemory(PswBuf2, '\0', PSW_MAX_LEN);
PswCnt = 0;
status = 1;
break;
case 5: //重新輸入密碼
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Enter Password");
InputCode(); //提示”請輸入密碼“
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
PswCnt = 0;
status = 0;
break;
default: //不予響應(yīng)
break;
}
}
/* Esc鍵動作函數(shù) */
void KeyEscAction()
{
// P2 = 0xFF;
switch (status)
{
case 0: //輸入密碼狀態(tài)時，清空當(dāng)前輸入以重新開始
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Enter Password");
InputCode(); //提示”請輸入密碼“
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
PswCnt = 0;
break;
case 1: //設(shè)置密碼狀態(tài)時，清空當(dāng)前輸入以重新開始
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Set Password");
SetCode(); //提示”請設(shè)置密碼“
FillMemory(PswBuf1, '\0', PSW_MAX_LEN);
PswCnt = 0;
break;
case 2: //設(shè)置密碼確認(rèn)狀態(tài)時，清空輸入并返回密碼設(shè)置狀態(tài)
Lcd12864_ClearScreen();
// LcdShowStr(0, 0, "Set Password");
SetCode(); //提示”請設(shè)置密碼“
…………限于本文篇幅余下代碼請從51黑下載附件…………

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