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基于51單片機(jī)的指紋鎖系統(tǒng)設(shè)計(jì)
在現(xiàn)代社會(huì)，隨著科技的不斷進(jìn)步，家庭安全變得越來越重要。傳統(tǒng)的機(jī)械鎖由于安全性低，已經(jīng)不能滿足人們對(duì)家庭安全的需求。因此，我們?cè)O(shè)計(jì)了一款基于51單片機(jī)的指紋鎖系統(tǒng)，該系統(tǒng)結(jié)合了指紋識(shí)別技術(shù)和密碼鎖的工作原理，提供了一種安全可靠、操作便捷的解決方案。
實(shí)物圖：
系統(tǒng)概述
本指紋鎖系統(tǒng)以STC89C52單片機(jī)為核心，輔以AS608指紋模塊、L298N電機(jī)驅(qū)動(dòng)芯片、LCD1602顯示屏等模塊。系統(tǒng)通過指紋驗(yàn)證或密碼輸入實(shí)現(xiàn)開鎖功能，具有操作簡(jiǎn)便、安全性高的特點(diǎn)。LCD顯示屏用于顯示系統(tǒng)狀態(tài)和用戶操作指引，而L298N芯片則用于驅(qū)動(dòng)鎖具的機(jī)械部分。
硬件設(shè)計(jì)
51單片機(jī)
51單片機(jī)是整個(gè)系統(tǒng)的核心，負(fù)責(zé)處理所有的邏輯控制和數(shù)據(jù)處理。STC89C52單片機(jī)具有足夠的I/O端口，可以連接多個(gè)外部設(shè)備，同時(shí)具備內(nèi)部Flash存儲(chǔ)器，便于程序的存儲(chǔ)和運(yùn)行。
AS608指紋模塊
AS608指紋模塊負(fù)責(zé)指紋的采集和識(shí)別。該模塊通過光學(xué)傳感器捕捉用戶的指紋圖像，并通過內(nèi)置算法進(jìn)行特征提取和比對(duì)。模塊通過串口與單片機(jī)通信，發(fā)送和接收控制指令。
L298N電機(jī)驅(qū)動(dòng)芯片
L298N芯片用于驅(qū)動(dòng)鎖具的電機(jī)，實(shí)現(xiàn)鎖舌的開啟和關(guān)閉。該芯片可以接收單片機(jī)的控制信號(hào)，驅(qū)動(dòng)電機(jī)正轉(zhuǎn)或反轉(zhuǎn)，從而控制鎖具的開閉狀態(tài)。
LCD1602顯示屏
LCD1602顯示屏用于顯示系統(tǒng)狀態(tài)和用戶操作指引。它能夠顯示多行文本信息，幫助用戶了解當(dāng)前的操作狀態(tài)，如指紋驗(yàn)證成功、密碼輸入錯(cuò)誤等提示信息。
軟件設(shè)計(jì)
軟件部分主要包括指紋模塊的驅(qū)動(dòng)程序、用戶界面的控制程序、密碼管理程序和主控制程序。
指紋模塊驅(qū)動(dòng)程序
//AS608?????￡?é
volatile unsigned char AS608_RECEICE_BUFFER[32]; //volatile:?μí3×üê???D?′ó?ü?ù?úμ??ú′??áè?êy?Y￡??′ê1?ü?°??μ???á?????′ó??′|?áè?1yêy?Y
//FINGERPRINTí¨D?D-òé?¨ò?
code unsigned char AS608_Get_Device[10] ={0x01,0x00,0x07,0x13,0x00,0x00,0x00,0x00,0x00,0x1b};//?úá??é?¤
code unsigned char AS608_Pack_Head[6] = {0xEF,0x01,0xFF,0xFF,0xFF,0xFF}; //D-òé°üí·
code unsigned char AS608_Get_Img[6] = {0x01,0x00,0x03,0x01,0x00,0x05}; //??μ?????í???
code unsigned char AS608_Get_Templete_Count[6] ={0x01,0x00,0x03,0x1D,0x00,0x21 }; //??μ??￡°?×üêy
code unsigned char AS608_Search[11]={0x01,0x00,0x08,0x04,0x01,0x00,0x00,0x03,0xE7,0x00,0xF8}; //???÷???????÷·??§0 - 999,ê1ó?BUFFER1?Dμ?ì??÷?????÷
code unsigned char AS608_Search_0_9[11]={0x01,0x00,0x08,0x04,0x01,0x00,0x00,0x00,0x13,0x00,0x21}; //???÷0-9o?????
code unsigned char AS608_Img_To_Buffer1[7]={0x01,0x00,0x04,0x02,0x01,0x00,0x08}; //??í???·?è?μ?BUFFER1
code unsigned char AS608_Img_To_Buffer2[7]={0x01,0x00,0x04,0x02,0x02,0x00,0x09}; //??í???·?è?μ?BUFFER2
code unsigned char AS608_Reg_Model[6]={0x01,0x00,0x03,0x05,0x00,0x09}; //??BUFFER1?úBUFFER2o?3éì??÷?￡°?
code unsigned char AS608_Delete_All_Model[6]={0x01,0x00,0x03,0x0d,0x00,0x11};//é?3y?????￡?éà??ùóDμ??￡°?
volatile unsigned char AS608_Save_Finger[9]={0x01,0x00,0x06,0x06,0x01,0x00,0x0B,0x00,0x19};//??BUFFER1?Dμ?ì??÷??′?·?μ????¨μ?????
//code unsigned char AS608_num_of_finger_in_lib1[7]={0x01,0x00,0x04,0x1F,0x00,0x00,0x24};//2é?′?????aμ??üá?
//code unsigned char AS608_num_of_finger_in_lib2[7]={0x01,0x00,0x04,0x1F,0x01,0x00,0x25};
//code unsigned char AS608_num_of_finger_in_lib3[7]={0x01,0x00,0x04,0x1F,0x02,0x00,0x26};
//code unsigned char AS608_num_of_finger_in_lib4[7]={0x01,0x00,0x04,0x1F,0x03,0x00,0x27};
//·￠?í°üí·
void AS608_Cmd_Send_Pack_Head(void)
{
int i;
for(i=0;i<6;i++) //°üí·
Uart_Send_Byte(AS608_Pack_Head[i]);
}
//·￠?í??á?
void AS608_Cmd_Check(void)
{
int i=0;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<10;i++)
Uart_Send_Byte(AS608_Get_Device[i]);
}
//?óê?·′à?êy?Y?o3?
void AS608_Receive_Data(unsigned char ucLength)
{
unsigned char i;
for (i=0;i<ucLength;i++)
AS608_RECEICE_BUFFER[i] = Uart_Receive_Byte();
}
//FINGERPRINT_??μ?????í????üá?
void AS608_Cmd_Get_Img(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<6;i++) //·￠?í?üá? 0x1d
Uart_Send_Byte(AS608_Get_Img[i]);
}
//??í???×a??3éì??÷??′?·??úBuffer1?D
void FINGERPRINT_Cmd_Img_To_Buffer1(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<7;i++) //·￠?í?üá? ??í???×a??3é ì??÷?? ′?·??ú CHAR_buffer1
Uart_Send_Byte(AS608_Img_To_Buffer1[i]);
}
//??í???×a??3éì??÷??′?·??úBuffer2?D
void FINGERPRINT_Cmd_Img_To_Buffer2(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<7;i++) //·￠?í?üá? ??í???×a??3é ì??÷?? ′?·??ú CHAR_buffer1
Uart_Send_Byte(AS608_Img_To_Buffer2[i]);
}
//???÷è?2?ó??§999??
void AS608_Cmd_Search_Finger(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<11;i++)
Uart_Send_Byte(AS608_Search[i]);
}
//×a??3éì??÷??
void AS608_Cmd_Reg_Model(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<6;i++)
Uart_Send_Byte(AS608_Reg_Model[i]);
}
//é?3y?????￡?éà?μ??ùóD?????￡°?
void FINGERPRINT_Cmd_Delete_All_Model(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<6;i++) //?üá?é?3y?????￡°?
Uart_Send_Byte(AS608_Delete_All_Model[i]);
}
//±￡′?????
void AS608_Cmd_Save_Finger( unsigned int storeID )
{
unsigned long temp = 0;
unsigned char i;
AS608_Save_Finger[5] =(storeID&0xFF00)>>8;
AS608_Save_Finger[6] = (storeID&0x00FF);
for(i=0;i<7;i++) //????D￡?éoí
temp = temp + AS608_Save_Finger[i];
AS608_Save_Finger[7]=(temp & 0x00FF00) >> 8; //′?·?D￡?éêy?Y
AS608_Save_Finger[8]= temp & 0x0000FF;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<9;i++)
Uart_Send_Byte(AS608_Save_Finger[i]); //·￠?í?üá? ??í???×a??3é ì??÷?? ′?·??ú CHAR_buffer1
}
//2é?′μ±?°?????a?D?????￡°?êy
int AS608_number_of_fingers()
{
int num=1;//??è??￡°??a?DóDò????￡°?
uchar i=0;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<6;i++)
Uart_Send_Byte(AS608_Get_Templete_Count[i]);
AS608_RECEICE_BUFFER[9]=1;//·?±?oóD??D??ê?·??óê?3é1|
AS608_Receive_Data(14);//?óê?êy?Y
if(AS608_RECEICE_BUFFER[9]==0) //?óê?3é1|
num=AS608_RECEICE_BUFFER[10]*256+AS608_RECEICE_BUFFER[11];//?′?ó?￡°?×ü??êy
return num;
}
//áíò???·?·¨2é?′?????a?Dê?·?óD?￡°? //±?à′ó|??2é?′?ùóD1000???￡°?????ê?·?′??ú?￡°?￡?μ?ò?°???ó?μ?μ??°256??￡?1ê′ó?ò
/*
bit AS608_notEmpty()
{
bit exist=0;
char i=0;
AS608_Cmd_Send_Pack_Head(); //·￠?íí¨D?D-òé°üí·
for(i=0;i<7;i++)
{
Uart_Send_Byte(AS608_num_of_finger_in_lib1[i]);
}
AS608_Receive_Data(10);//?óê??°10byteêy?Y,3yμú10×??úμ?è·è???ía￡???óàè?2??a?ú
if(AS608_RECEICE_BUFFER[9]==0) //?óê?3é1|
{
AS608_Receive_Data(32);//?óê?oóD?32byteêy?Y￡?′??′0~255???￡°??aê?·?′??ú?????￡°?μ?êy?Y
for(i=0;i<32;i++)//2é?′?a32byteêy?Y￡?è?o?ò???????′??ú?￡°??ò·μ???μ?a??￡?·??ò?a?ù
{
if(AS608_RECEICE_BUFFER[i])
exist=1;
}
return exist;
}
}
*/
//ìí?ó????
void AS608_Add_Fingerprint()
{
unsigned char id_show[]={0,0,0};
LCD1602_WriteCMD(0x01); //???á
while(1)
{
LCD1602_Display(0x80," Add finger ",0,16);
LCD1602_Display(0xc0," ID is ",0,16);
//°′·μ???ü?±?ó??μ??÷2?μ￥
if(KEY_CANCEL == 0)
{
Delay_ms(5);
if(KEY_CANCEL == 0)
{
while(KEY_CANCEL==0);
break;
}
}
//°′?D???ü????iD?μ?ó1
if(KEY_DOWN == 0)
{
Delay_ms(5);
if(KEY_DOWN == 0)
{
while(KEY_DOWN==0);
if(finger_id == 1000)
finger_id = 1;//±￡á?0o?2?±??2??
else
finger_id = finger_id + 1;
}
}
//????iD?μ??ê?′|àí
LCD1602_WriteCMD(0xc0+10);
LCD1602_Display_Number(finger_id);
//°′è·è??ü?aê???è?????D??￠
if(KEY_OK == 0)
{
Delay_ms(5);
if(KEY_OK == 0)
{
while(KEY_OK==0);
LCD1602_Display(0x80," Please finger ",0,16);
LCD1602_Display(0xc0," ",0,16);
while(KEY_CANCEL == 1)
{
//°′??·μ???üí?3???è?·μ??fingerIDμ÷??×′ì?
if(KEY_CANCEL == 0)
{
Delay_ms(5);
if(KEY_CANCEL == 0)
{
while(KEY_CANCEL==0);
break;
}
}
AS608_Cmd_Get_Img(); //??μ?????í???
AS608_Receive_Data(12);
//?D???óê?μ?μ?è·è???,μèóú0??????è?3é1|
if(AS608_RECEICE_BUFFER[9]==0)
{
Delay_ms(100);
FINGERPRINT_Cmd_Img_To_Buffer1();
AS608_Receive_Data(12);
LCD1602_Display(0x80,"Successful entry",0,16);
Beep_Times(1);
Delay_ms(1000);
LCD1602_Display(0x80," Please finger ",0,16);
LCD1602_Display(0xc0," ",0,16);
while(1)
{
if(KEY_CANCEL == 0)
{
Delay_ms(5);
if(KEY_CANCEL == 0)
{
while(KEY_CANCEL==0);
break;
}
}
AS608_Cmd_Get_Img(); //??μ?????í???
AS608_Receive_Data(12);
//?D???óê?μ?μ?è·è???,μèóú0??????è?3é1|
if(AS608_RECEICE_BUFFER[9]==0)
{
Delay_ms(200);
LCD1602_Display(0x80,"Successful entry",0,16);
LCD1602_Display(0xc0," ID is ",0,16);
//????iD?μ??ê?′|àí
LCD1602_WriteCMD(0xc0+10);
LCD1602_Display_Number(finger_id);
FINGERPRINT_Cmd_Img_To_Buffer2();
AS608_Receive_Data(12);
AS608_Cmd_Reg_Model();//×a??3éì??÷??
AS608_Receive_Data(12);
AS608_Cmd_Save_Finger(finger_id);
AS608_Receive_Data(12);
Beep_Times(1);
Delay_ms(1000);
finger_id=finger_id+1;
break;
}
}
break;
}
}
}
}
}
}
//???÷????
void AS608_Find_Fingerprint()
{
unsigned int find_fingerid = 0;
unsigned char id_show[]={0,0,0};
do
{
LCD1602_Display(0x80," Please finger ",0,16);
LCD1602_Display(0xc0," ",0,16);
AS608_Cmd_Get_Img(); //??μ?????í???
AS608_Receive_Data(12);
//?D???óê?μ?μ?è·è???,μèóú0??????è?3é1|
if(AS608_RECEICE_BUFFER[9]==0)
{
Delay_ms(100);
FINGERPRINT_Cmd_Img_To_Buffer1();
AS608_Receive_Data(12);
AS608_Cmd_Search_Finger();
AS608_Receive_Data(16);
if(AS608_RECEICE_BUFFER[9] == 0) //???÷μ?
{
//?a??3é1|//
LCD1602_Display(0x80," Search success ",0,16);
LCD1602_Display(0xc0," ID is ",0,16);
Beep_Times(1);
//?′?ó????IDêy
find_fingerid = AS608_RECEICE_BUFFER[10]*256 + AS608_RECEICE_BUFFER[11];
//????iD?μ??ê?′|àí
LCD1602_WriteCMD(0xc0+10);
LCD1602_Display_Number(find_fingerid);
//????IO?ú￡??′DD?a??2ù×÷
if(flag)
{
P1=0xfe;
Delay_ms(OpenTime*100);
P1=0xff; //μ??ˉ?úí￡?1×a?ˉ
Delay_ms(1000);
P1=0xfd; //μ??ˉ?ú·′×a?′??
Delay_ms(CloseTime*100);//μ??ú?y×a×èá|??′óóú·′×a￡?Dy×a?àí????èê±￡??y×aDèòa?ü?àê±??
P1=0xff; //μ??ˉ?úí￡?1×a?ˉ
}
flag=1; //?êDíoóD??à1?2ù×÷￡oìí?ó?òé?3y?????￡°?
break;
}
else //??óD?òμ?
{
LCD1602_Display(0x80," Search failed ",0,16);
LCD1602_Display(0xc0," ",0,16);
Beep_Times(3);
}
}
}while(KEY_CANCEL == 1);
}
//é?3y?ùóD′??üμ??????a
void AS608_Delete_All_Fingerprint()
{
unsigned char i=0;
LCD1602_Display(0x80," empty all ",0,16);
LCD1602_Display(0xc0," Yes or no ? ",0,16);
do
{
if(KEY_OK==0)
{
Delay_ms(5);
if(KEY_OK==0)
{
while(KEY_OK==0);
LCD1602_Display(0x80," emptying ",0,16);
LCD1602_Display(0xc0," ",0,16);
Delay_ms(300);
LCD1602_WriteCMD(0xc0);
for(i=0;i<16;i++)
{
LCD1602_WriteDAT(42);// ?′'*'
Delay_ms(100);
}
FINGERPRINT_Cmd_Delete_All_Model();
AS608_Receive_Data(12);
LCD1602_Display(0x80," All empty ",0,16);
LCD1602_Display(0xc0," ",0,16);
Beep_Times(3);
break;
}
}
}while(KEY_CANCEL==1);
}
該程序負(fù)責(zé)與AS608指紋模塊進(jìn)行通信，實(shí)現(xiàn)指紋的采集、特征提取和比對(duì)。程序通過串口發(fā)送指令，控制指紋模塊的工作狀態(tài)，并接收模塊返回的比對(duì)結(jié)果。
用戶界面控制程序
//òo?§·±?|?ì2a
void LCD1602_CheckBusy(void)
{
uchar busy;
DataPort=0xff;
RS=0;
RW=1;
do
{
EN=1;
busy=DataPort;
EN=0;
}while(busy&0x80);
}
//òo?§3?ê??ˉoˉêy
void LCD1602_Init(void)
{
Delay_ms(15); //é?μ??óê±15ms
LCD1602_WriteCMD(0x38); //D′??ê???á?(2??ì2a?|D?o?)
Delay_ms(5);
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x38); //D′??ê???á?
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x01); //???á
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x06); //??ê?1a±êò??ˉéè??
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x0c); //??ê??a?°1a±êéè??
}
//òo?§??ê?oˉêy è??ú2?êy￡oaddr?eê?μ??·￡?pointer????μ??·￡?index??±ê￡?num??êy
void LCD1602_Display(unsigned char addr,unsigned char* pointer,unsigned char index,unsigned char num)
{
unsigned char i;
LCD1602_CheckBusy(); //?D???|D?o?
LCD1602_WriteCMD(addr); //D′è?μ??·
for(i=0;i<num;i++) //D′è?êy?Y
{
LCD1602_CheckBusy(); //?D???|D?o?
LCD1602_WriteDAT(pointer[index+i]);//D′è?êy?Y
}
}
//òo?§??ê?????êy
void LCD1602_Display_Number(unsigned int num)
{
if(num/1000)
LCD1602_WriteDAT(num/1000+48);
LCD1602_WriteDAT(num%1000/100+48);
LCD1602_WriteDAT(num%100/10+48);
LCD1602_WriteDAT(num%10+48);
}
該程序負(fù)責(zé)控制LCD1602顯示屏，顯示系統(tǒng)狀態(tài)和用戶操作指引。程序根據(jù)系統(tǒng)的工作狀態(tài)，動(dòng)態(tài)更新顯示內(nèi)容，提供清晰的用戶交互界面。
主控制程序
//?÷oˉêy
void main()
{
finger_id=0;
I2C_init();//I2C3?ê??ˉ
LCD1602_Init(); //3?ê??ˉòo?§
LCD1602_Display(0x80," Designer : lsy ",0,16); //òo?§?a?ú??ê?????
Delay_ms(500);
LCD1602_Display(0x80,"Fingerprint Test",0,16); //òo?§?a?ú??ê?????
Uart_Init(); //3?ê??ˉ′??ú
Key_Init(); //3?ê??ˉ°′?ü
Delay_ms(200); //?óê±200MS￡?μè′y?????￡?é?′??
Device_Check(); //D￡???????￡?éê?·??óè??yè·￡?òo?§×?3??àó|μ?ìáê?
Delay_ms(1000); //???ó3é1|????í￡á?ò??¨ê±??
OpenTime=I2C_ReadData(254);//′óAT24C02μú254??μ￥?a?D?áè?êy?Y
CloseTime=I2C_ReadData(250);//′óAT24C02μú255??μ￥?a?D?áè?êy?Y
while(1)
{
/**************??è??÷1|?ü????****************/
LCD1602_Display(0x80," search finger ",0,16); //μúò?????ê????÷????
LCD1602_Display(0xc0," Add delete",0,16); //ìí?óoíé?3y????
switch(local_date)
{
case 0:
LCD1602_Display(0x80, " *",0,2);
LCD1602_Display(0xc0, " ",0,2);
LCD1602_Display(0xc0+8," ",0,2);
break;
case 1:
LCD1602_Display(0x80, " ",0,2);
LCD1602_Display(0xc0, " *",0,2);
LCD1602_Display(0xc0+8," ",0,2);
break;
case 2:
LCD1602_Display(0x80, " ",0,2);
LCD1602_Display(0xc0, " ",0,2);
LCD1602_Display(0xc0+8," *",0,2);
break;
}
//è·è??ü
if(KEY_OK == 0)
{
Delay_ms(5);
if(KEY_OK == 0)
{
while(KEY_OK == 0);//μè′y?é?a°′?ü
switch(local_date)
{
case 0: //???÷????
flag=1;
AS608_Find_Fingerprint();
break;
case 1: //ìí?ó????
flag=1; //flag=1￡?è??????a?a??￡??ò?éò??±?óìí?ó????
if(AS608_number_of_fingers())
{
flag=0;//flag??0óéá???×÷ó?￡o
//1?￠?????a?Dò?óD????￡??òDèòa???÷?￥??3é1|￡?óéAS608_Find_Fingerprint()??flag??1￡?2??üìí?ó????
//2?￠flag=0￡??ò?ú???÷????3é1|oó2??′DD?a??2ù×÷
AS608_Find_Fingerprint();
}
if(flag)
AS608_Add_Fingerprint();
break;
case 2: //????????
flag=0; //1?￠?ú???÷????3é1|oó2??′DD?a??2ù×÷￡?2?￠è????÷2?3é1|￡?2??′DD????2ù×÷
AS608_Find_Fingerprint();//???÷?￥??3é1|oó￡?oˉêy?ú2???flag??1￡?2??ü?????????a
if(flag)
AS608_Delete_All_Fingerprint();
break;
}
}
}
//?D???ü
if(KEY_DOWN == 0)
{
Delay_ms(5);
if(KEY_DOWN == 0)
{
while(KEY_DOWN == 0); //μè′y?é?a°′?ü
local_date++;
if(local_date==3)
local_date=0;
}
}
//°′Key_Mode??è?ê±??μ÷???￡ê?
if (KEY_Mode == 0)
{
Delay_ms(5);
if(KEY_Mode == 0)
{
while(KEY_Mode == 0);
flag=0;
AS608_Find_Fingerprint();
if(flag)
Refresh_time();
}
}
Delay_ms(100); //?óê±?D??100MS?ì2aò?′?
}
}
主控制程序負(fù)責(zé)協(xié)調(diào)各個(gè)模塊的工作，實(shí)現(xiàn)系統(tǒng)的開鎖邏輯。當(dāng)用戶進(jìn)行指紋驗(yàn)證或密碼輸入時(shí)，主程序會(huì)調(diào)用相應(yīng)的驅(qū)動(dòng)程序，根據(jù)驗(yàn)證結(jié)果控制L298N芯片，實(shí)現(xiàn)鎖具的開閉。
系統(tǒng)功能
本指紋鎖系統(tǒng)具備以下功能：
- 指紋開鎖：用戶可以通過驗(yàn)證指紋來開鎖。
- 狀態(tài)顯示：LCD顯示屏?xí)?shí)時(shí)顯示系統(tǒng)狀態(tài)，如開鎖成功、密碼錯(cuò)誤等。
- 安全報(bào)警：如果連續(xù)多次輸入錯(cuò)誤的指紋，系統(tǒng)會(huì)觸發(fā)報(bào)警。
結(jié)論
基于51單片機(jī)的指紋鎖系統(tǒng)設(shè)計(jì)，不僅提高了家庭安全的水平，也為用戶提供了便捷的開鎖方式。通過結(jié)合現(xiàn)代電子技術(shù)和生物識(shí)別技術(shù)，該系統(tǒng)在保證安全性的同時(shí)，也提供了良好的用戶體驗(yàn)。隨著技術(shù)的不斷進(jìn)步，未來指紋鎖系統(tǒng)將更加智能化、多樣化，為家庭安全提供更加可靠的保障。
原理圖
PCB設(shè)計(jì)
希望你喜歡這個(gè)項(xiàng)目，并在構(gòu)建過程中找到樂趣！如果你有任何問題或需要幫助，歡迎在評(píng)論區(qū)交流。
作者：Svan.
注意：本博文為不得在未經(jīng)本人同意進(jìn)行轉(zhuǎn)載或者二次創(chuàng)作，違者必究?。?！
博客主頁：https://blog.csdn.net/weixin_51141489，需要源碼或相關(guān)資料實(shí)物的友友請(qǐng)關(guān)注、點(diǎn)贊，私信吧！
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