1274
基于51单片机的指纹锁系统设计
在现代社会，随着科技的不断进步，家庭安全变得越来越重要。传统的机械锁由于安全性低，已经不能满足人们对家庭安全的需求。因此，我们设计了一款基于51单片机的指纹锁系统，该系统结合了指纹识别技术和密码锁的工作原理，提供了一种安全可靠、操作便捷的解决方案。
实物图：
系统概述
本指纹锁系统以STC89C52单片机为核心，辅以AS608指纹模块、L298N电机驱动芯片、LCD1602显示屏等模块。系统通过指纹验证或密码输入实现开锁功能，具有操作简便、安全性高的特点。LCD显示屏用于显示系统状态和用户操作指引，而L298N芯片则用于驱动锁具的机械部分。
硬件设计
51单片机
51单片机是整个系统的核心，负责处理所有的逻辑控制和数据处理。STC89C52单片机具有足够的I/O端口，可以连接多个外部设备，同时具备内部Flash存储器，便于程序的存储和运行。
AS608指纹模块
AS608指纹模块负责指纹的采集和识别。该模块通过光学传感器捕捉用户的指纹图像，并通过内置算法进行特征提取和比对。模块通过串口与单片机通信，发送和接收控制指令。
L298N电机驱动芯片
L298N芯片用于驱动锁具的电机，实现锁舌的开启和关闭。该芯片可以接收单片机的控制信号，驱动电机正转或反转，从而控制锁具的开闭状态。
LCD1602显示屏
LCD1602显示屏用于显示系统状态和用户操作指引。它能够显示多行文本信息，帮助用户了解当前的操作状态，如指纹验证成功、密码输入错误等提示信息。
软件设计
软件部分主要包括指纹模块的驱动程序、用户界面的控制程序、密码管理程序和主控制程序。
指纹模块驱动程序
//AS608Ö¸ÎÆÄ£¿é
volatile unsigned char AS608_RECEICE_BUFFER[32]; //volatile:ϵͳ×ÜÊÇÖØдÓËüËùÔÚµÄÄÚ´æ¶ÁÈ¡Êý¾Ý£¬¼´Ê¹ËüÇ°ÃæµÄÖ¸Áî¸Õ¸Õ´Ó¸Ã´¦¶ÁÈ¡¹ýÊý¾Ý
//FINGERPRINTͨÐÅÐÒ鶨Òå
code unsigned char AS608_Get_Device[10] ={0x01,0x00,0x07,0x13,0x00,0x00,0x00,0x00,0x00,0x1b};//¿ÚÁîÑéÖ¤
code unsigned char AS608_Pack_Head[6] = {0xEF,0x01,0xFF,0xFF,0xFF,0xFF}; //ÐÒé°üÍ·
code unsigned char AS608_Get_Img[6] = {0x01,0x00,0x03,0x01,0x00,0x05}; //»ñµÃÖ¸ÎÆͼÏñ
code unsigned char AS608_Get_Templete_Count[6] ={0x01,0x00,0x03,0x1D,0x00,0x21 }; //»ñµÃÄ£°æ×ÜÊý
code unsigned char AS608_Search[11]={0x01,0x00,0x08,0x04,0x01,0x00,0x00,0x03,0xE7,0x00,0xF8}; //ËÑË÷Ö¸ÎÆËÑË÷·¶Î§0 - 999,ʹÓÃBUFFER1ÖеÄÌØÕ÷ÂëËÑË÷
code unsigned char AS608_Search_0_9[11]={0x01,0x00,0x08,0x04,0x01,0x00,0x00,0x00,0x13,0x00,0x21}; //ËÑË÷0-9ºÅÖ¸ÎÆ
code unsigned char AS608_Img_To_Buffer1[7]={0x01,0x00,0x04,0x02,0x01,0x00,0x08}; //½«Í¼Ïñ·ÅÈëµ½BUFFER1
code unsigned char AS608_Img_To_Buffer2[7]={0x01,0x00,0x04,0x02,0x02,0x00,0x09}; //½«Í¼Ïñ·ÅÈëµ½BUFFER2
code unsigned char AS608_Reg_Model[6]={0x01,0x00,0x03,0x05,0x00,0x09}; //½«BUFFER1¸úBUFFER2ºÏ³ÉÌØÕ÷Ä£°æ
code unsigned char AS608_Delete_All_Model[6]={0x01,0x00,0x03,0x0d,0x00,0x11};//ɾ³ýÖ¸ÎÆÄ£¿éÀïËùÓеÄÄ£°æ
volatile unsigned char AS608_Save_Finger[9]={0x01,0x00,0x06,0x06,0x01,0x00,0x0B,0x00,0x19};//½«BUFFER1ÖеÄÌØÕ÷Âë´æ·Åµ½Ö¸¶¨µÄλÖÃ
//code unsigned char AS608_num_of_finger_in_lib1[7]={0x01,0x00,0x04,0x1F,0x00,0x00,0x24};//²é¿´Ö¸ÎÆ¿âµÄÃüÁî
//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};
//·¢ËÍ°üÍ·
void AS608_Cmd_Send_Pack_Head(void)
{
int i;
for(i=0;i<6;i++) //°üÍ·
Uart_Send_Byte(AS608_Pack_Head[i]);
}
//·¢ËÍÖ¸Áî
void AS608_Cmd_Check(void)
{
int i=0;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<10;i++)
Uart_Send_Byte(AS608_Get_Device[i]);
}
//½ÓÊÕ·´À¡Êý¾Ý»º³å
void AS608_Receive_Data(unsigned char ucLength)
{
unsigned char i;
for (i=0;i<ucLength;i++)
AS608_RECEICE_BUFFER[i] = Uart_Receive_Byte();
}
//FINGERPRINT_»ñµÃÖ¸ÎÆͼÏñÃüÁî
void AS608_Cmd_Get_Img(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<6;i++) //·¢ËÍÃüÁî 0x1d
Uart_Send_Byte(AS608_Get_Img[i]);
}
//½«Í¼Ïñת»»³ÉÌØÕ÷Âë´æ·ÅÔÚBuffer1ÖÐ
void FINGERPRINT_Cmd_Img_To_Buffer1(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<7;i++) //·¢ËÍÃüÁî ½«Í¼Ïñת»»³É ÌØÕ÷Âë ´æ·ÅÔÚ CHAR_buffer1
Uart_Send_Byte(AS608_Img_To_Buffer1[i]);
}
//½«Í¼Ïñת»»³ÉÌØÕ÷Âë´æ·ÅÔÚBuffer2ÖÐ
void FINGERPRINT_Cmd_Img_To_Buffer2(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<7;i++) //·¢ËÍÃüÁî ½«Í¼Ïñת»»³É ÌØÕ÷Âë ´æ·ÅÔÚ CHAR_buffer1
Uart_Send_Byte(AS608_Img_To_Buffer2[i]);
}
//ËÑË÷È«²¿Óû§999ö
void AS608_Cmd_Search_Finger(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<11;i++)
Uart_Send_Byte(AS608_Search[i]);
}
//ת»»³ÉÌØÕ÷Âë
void AS608_Cmd_Reg_Model(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<6;i++)
Uart_Send_Byte(AS608_Reg_Model[i]);
}
//ɾ³ýÖ¸ÎÆÄ£¿éÀïµÄËùÓÐÖ¸ÎÆÄ£°æ
void FINGERPRINT_Cmd_Delete_All_Model(void)
{
unsigned char i;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<6;i++) //ÃüÁîɾ³ýÖ¸ÎÆÄ£°æ
Uart_Send_Byte(AS608_Delete_All_Model[i]);
}
//±£´æÖ¸ÎÆ
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++) //¼ÆËãУÑéºÍ
temp = temp + AS608_Save_Finger[i];
AS608_Save_Finger[7]=(temp & 0x00FF00) >> 8; //´æ·ÅУÑéÊý¾Ý
AS608_Save_Finger[8]= temp & 0x0000FF;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<9;i++)
Uart_Send_Byte(AS608_Save_Finger[i]); //·¢ËÍÃüÁî ½«Í¼Ïñת»»³É ÌØÕ÷Âë ´æ·ÅÔÚ CHAR_buffer1
}
//²é¿´µ±Ç°Ö¸ÎÆ¿âÖÐÖ¸ÎÆÄ£°åÊý
int AS608_number_of_fingers()
{
int num=1;//ĬÈÏÄ£°å¿âÖÐÓÐÒ»¸öÄ£°å
uchar i=0;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<6;i++)
Uart_Send_Byte(AS608_Get_Templete_Count[i]);
AS608_RECEICE_BUFFER[9]=1;//·½±ãºóÐøÅжÏÊÇ·ñ½ÓÊճɹ¦
AS608_Receive_Data(14);//½ÓÊÕÊý¾Ý
if(AS608_RECEICE_BUFFER[9]==0) //½ÓÊճɹ¦
num=AS608_RECEICE_BUFFER[10]*256+AS608_RECEICE_BUFFER[11];//Æ´½ÓÄ£°å×ܸöÊý
return num;
}
//ÁíÒ»ÖÖ·½·¨²é¿´Ö¸ÎÆ¿âÖÐÊÇ·ñÓÐÄ£°å //±¾À´Ó¦¸Ã²é¿´ËùÓÐ1000¸öÄ£°åλÖÃÊÇ·ñ´æÔÚÄ£°å£¬µ«Ò»°ãÖ»Óõõ½Ç°256¸ö£¬¹Ê´Ó¼ò
/*
bit AS608_notEmpty()
{
bit exist=0;
char i=0;
AS608_Cmd_Send_Pack_Head(); //·¢ËÍͨÐÅÐÒé°üÍ·
for(i=0;i<7;i++)
{
Uart_Send_Byte(AS608_num_of_finger_in_lib1[i]);
}
AS608_Receive_Data(10);//½ÓÊÕÇ°10byteÊý¾Ý,³ýµÚ10×Ö½ÚµÄÈ·ÈÏÂëÍ⣬ÆäÓàÈ«²¿¶ªÆú
if(AS608_RECEICE_BUFFER[9]==0) //½ÓÊճɹ¦
{
AS608_Receive_Data(32);//½ÓÊÕºóÐø32byteÊý¾Ý£¬´Ë¼´0~255¸öÄ£°åΪÊÇ·ñ´æÔÚÖ¸ÎÆÄ£°åµÄÊý¾Ý
for(i=0;i<32;i++)//²é¿´Õâ32byteÊý¾Ý£¬ÈκÎÒ»¸öλÖôæÔÚÄ£°åÔò·µ»ØֵΪÕ棬·ñÔòΪ¼Ù
{
if(AS608_RECEICE_BUFFER[i])
exist=1;
}
return exist;
}
}
*/
//Ìí¼ÓÖ¸ÎÆ
void AS608_Add_Fingerprint()
{
unsigned char id_show[]={0,0,0};
LCD1602_WriteCMD(0x01); //ÇåÆÁ
while(1)
{
LCD1602_Display(0x80," Add finger ",0,16);
LCD1602_Display(0xc0," ID is ",0,16);
//°´·µ»Ø¼üÖ±½Ó»Øµ½Ö÷²Ëµ¥
if(KEY_CANCEL == 0)
{
Delay_ms(5);
if(KEY_CANCEL == 0)
{
while(KEY_CANCEL==0);
break;
}
}
//°´Çл»¼üÖ¸ÎÆiDÖµ¼Ó1
if(KEY_DOWN == 0)
{
Delay_ms(5);
if(KEY_DOWN == 0)
{
while(KEY_DOWN==0);
if(finger_id == 1000)
finger_id = 1;//±£Áô0ºÅ²»±»¸²¸Ç
else
finger_id = finger_id + 1;
}
}
//Ö¸ÎÆiDÖµÏÔʾ´¦Àí
LCD1602_WriteCMD(0xc0+10);
LCD1602_Display_Number(finger_id);
//°´È·Èϼü¿ªÊ¼Â¼ÈëÖ¸ÎÆÐÅÏ¢
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)
{
//°´Ï·µ»Ø¼üÍ˳ö¼Èë·µ»ØfingerIDµ÷Õû״̬
if(KEY_CANCEL == 0)
{
Delay_ms(5);
if(KEY_CANCEL == 0)
{
while(KEY_CANCEL==0);
break;
}
}
AS608_Cmd_Get_Img(); //»ñµÃÖ¸ÎÆͼÏñ
AS608_Receive_Data(12);
//ÅжϽÓÊÕµ½µÄÈ·ÈÏÂë,µÈÓÚ0Ö¸ÎÆ»ñÈ¡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(); //»ñµÃÖ¸ÎÆͼÏñ
AS608_Receive_Data(12);
//ÅжϽÓÊÕµ½µÄÈ·ÈÏÂë,µÈÓÚ0Ö¸ÎÆ»ñÈ¡³É¹¦
if(AS608_RECEICE_BUFFER[9]==0)
{
Delay_ms(200);
LCD1602_Display(0x80,"Successful entry",0,16);
LCD1602_Display(0xc0," ID is ",0,16);
//Ö¸ÎÆiDÖµÏÔʾ´¦Àí
LCD1602_WriteCMD(0xc0+10);
LCD1602_Display_Number(finger_id);
FINGERPRINT_Cmd_Img_To_Buffer2();
AS608_Receive_Data(12);
AS608_Cmd_Reg_Model();//ת»»³ÉÌØÕ÷Âë
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;
}
}
}
}
}
}
//ËÑË÷Ö¸ÎÆ
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(); //»ñµÃÖ¸ÎÆͼÏñ
AS608_Receive_Data(12);
//ÅжϽÓÊÕµ½µÄÈ·ÈÏÂë,µÈÓÚ0Ö¸ÎÆ»ñÈ¡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) //ËÑË÷µ½
{
//½âËø³É¹¦//
LCD1602_Display(0x80," Search success ",0,16);
LCD1602_Display(0xc0," ID is ",0,16);
Beep_Times(1);
//Æ´½ÓÖ¸ÎÆIDÊý
find_fingerid = AS608_RECEICE_BUFFER[10]*256 + AS608_RECEICE_BUFFER[11];
//Ö¸ÎÆiDÖµÏÔʾ´¦Àí
LCD1602_WriteCMD(0xc0+10);
LCD1602_Display_Number(find_fingerid);
//ÅäÖÃIO¿Ú£¬Ö´ÐпªËø²Ù×÷
if(flag)
{
P1=0xfe;
Delay_ms(OpenTime*100);
P1=0xff; //µç¶¯»úֹͣת¶¯
Delay_ms(1000);
P1=0xfd; //µç¶¯»ú·´×ª¸´Î»
Delay_ms(CloseTime*100);//µç»úÕýת×èÁ¦Ô¶´óÓÚ·´×ª£¬ÐýתÏàͬ½Ç¶Èʱ£¬ÕýתÐèÒª¸ü¶àʱ¼ä
P1=0xff; //µç¶¯»úֹͣת¶¯
}
flag=1; //ÔÊÐíºóÐøÏà¹Ø²Ù×÷£ºÌí¼Ó»òɾ³ýÖ¸ÎÆÄ£°å
break;
}
else //ûÓÐÕÒµ½
{
LCD1602_Display(0x80," Search failed ",0,16);
LCD1602_Display(0xc0," ",0,16);
Beep_Times(3);
}
}
}while(KEY_CANCEL == 1);
}
//ɾ³ýËùÓдæÖüµÄÖ¸ÎÆ¿â
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);// ¼´'*'
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);
}
该程序负责与AS608指纹模块进行通信，实现指纹的采集、特征提取和比对。程序通过串口发送指令，控制指纹模块的工作状态，并接收模块返回的比对结果。
用户界面控制程序
//Òº¾§·±Ã¦¼ì²â
void LCD1602_CheckBusy(void)
{
uchar busy;
DataPort=0xff;
RS=0;
RW=1;
do
{
EN=1;
busy=DataPort;
EN=0;
}while(busy&0x80);
}
//Òº¾§³õʼ»¯º¯Êý
void LCD1602_Init(void)
{
Delay_ms(15); //ÉϵçÑÓʱ15ms
LCD1602_WriteCMD(0x38); //дÏÔʾָÁî(²»¼ì²âæÐźÅ)
Delay_ms(5);
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x38); //дÏÔʾָÁî
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x01); //ÇåÆÁ
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x06); //ÏÔʾ¹â±êÒƶ¯ÉèÖÃ
LCD1602_CheckBusy();
LCD1602_WriteCMD(0x0c); //ÏÔʾ¿ª¼°¹â±êÉèÖÃ
}
//Òº¾§ÏÔʾº¯Êý Èë¿Ú²ÎÊý£ºaddrÆðʼµØÖ·£¬pointerÖ¸ÕëµØÖ·£¬indexϱ꣬num¸öÊý
void LCD1602_Display(unsigned char addr,unsigned char* pointer,unsigned char index,unsigned char num)
{
unsigned char i;
LCD1602_CheckBusy(); //ÅжÏæÐźÅ
LCD1602_WriteCMD(addr); //дÈëµØÖ·
for(i=0;i<num;i++) //дÈëÊý¾Ý
{
LCD1602_CheckBusy(); //ÅжÏæÐźÅ
LCD1602_WriteDAT(pointer[index+i]);//дÈëÊý¾Ý
}
}
//Òº¾§ÏÔʾËÄλÊý
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);
}
该程序负责控制LCD1602显示屏，显示系统状态和用户操作指引。程序根据系统的工作状态，动态更新显示内容，提供清晰的用户交互界面。
主控制程序
//Ö÷º¯Êý
void main()
{
finger_id=0;
I2C_init();//I2C³õʼ»¯
LCD1602_Init(); //³õʼ»¯Òº¾§
LCD1602_Display(0x80," Designer : lsy ",0,16); //Òº¾§¿ª»úÏÔʾ½çÃæ
Delay_ms(500);
LCD1602_Display(0x80,"Fingerprint Test",0,16); //Òº¾§¿ª»úÏÔʾ½çÃæ
Uart_Init(); //³õʼ»¯´®¿Ú
Key_Init(); //³õʼ»¯°´¼ü
Delay_ms(200); //ÑÓʱ200MS£¬µÈ´ýÖ¸ÎÆÄ£¿é¸´Î»
Device_Check(); //У¶ÔÖ¸ÎÆÄ£¿éÊÇ·ñ½ÓÈëÕýÈ·£¬Òº¾§×ö³öÏàÓ¦µÄÌáʾ
Delay_ms(1000); //¶Ô½Ó³É¹¦½çÃæÍ£ÁôÒ»¶¨Ê±¼ä
OpenTime=I2C_ReadData(254);//´ÓAT24C02µÚ254¸öµ¥ÔªÖжÁÈ¡Êý¾Ý
CloseTime=I2C_ReadData(250);//´ÓAT24C02µÚ255¸öµ¥ÔªÖжÁÈ¡Êý¾Ý
while(1)
{
/**************½øÈëÖ÷¹¦ÄܽçÃæ****************/
LCD1602_Display(0x80," search finger ",0,16); //µÚÒ»ÅÅÏÔʾËÑË÷Ö¸ÎÆ
LCD1602_Display(0xc0," Add delete",0,16); //Ìí¼ÓºÍɾ³ýÖ¸ÎÆ
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·Èϼü
if(KEY_OK == 0)
{
Delay_ms(5);
if(KEY_OK == 0)
{
while(KEY_OK == 0);//µÈ´ýËÉ¿ª°´¼ü
switch(local_date)
{
case 0: //ËÑË÷Ö¸ÎÆ
flag=1;
AS608_Find_Fingerprint();
break;
case 1: //Ìí¼ÓÖ¸ÎÆ
flag=1; //flag=1£¬ÈôÖ¸ÎÆ¿âΪ¿Õ£¬Ôò¿ÉÒÔÖ±½ÓÌí¼ÓÖ¸ÎÆ
if(AS608_number_of_fingers())
{
flag=0;//flagÖÃ0ÓÉÁ½ÖØ×÷Óãº
//1¡¢Ö¸ÎÆ¿âÖÐÒÑÓÐÖ¸ÎÆ£¬ÔòÐèÒªËÑË÷Æ¥Åä³É¹¦£¬ÓÉAS608_Find_Fingerprint()½«flagÖÃ1£¬²ÅÄÜÌí¼ÓÖ¸ÎÆ
//2¡¢flag=0£¬ÔòÔÚËÑË÷Ö¸ÎƳɹ¦ºó²»Ö´ÐпªËø²Ù×÷
AS608_Find_Fingerprint();
}
if(flag)
AS608_Add_Fingerprint();
break;
case 2: //Çå¿ÕÖ¸ÎÆ
flag=0; //1¡¢ÔÚËÑË÷Ö¸ÎƳɹ¦ºó²»Ö´ÐпªËø²Ù×÷£»2¡¢ÈôËÑË÷²»³É¹¦£¬²»Ö´ÐÐÇå¿Õ²Ù×÷
AS608_Find_Fingerprint();//ËÑË÷Æ¥Åä³É¹¦ºó£¬º¯ÊýÄÚ²¿½«flagÖÃ1£¬²ÅÄÜÇå¿ÕÖ¸ÎÆ¿â
if(flag)
AS608_Delete_All_Fingerprint();
break;
}
}
}
//Çл»¼ü
if(KEY_DOWN == 0)
{
Delay_ms(5);
if(KEY_DOWN == 0)
{
while(KEY_DOWN == 0); //µÈ´ýËÉ¿ª°´¼ü
local_date++;
if(local_date==3)
local_date=0;
}
}
//°´Key_Mode½øÈëʱ¼äµ÷Õûģʽ
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); //ÑÓʱÅжÏ100MS¼ì²âÒ»´Î
}
}
主控制程序负责协调各个模块的工作，实现系统的开锁逻辑。当用户进行指纹验证或密码输入时，主程序会调用相应的驱动程序，根据验证结果控制L298N芯片，实现锁具的开闭。
系统功能
本指纹锁系统具备以下功能：
- 指纹开锁：用户可以通过验证指纹来开锁。
- 状态显示：LCD显示屏会实时显示系统状态，如开锁成功、密码错误等。
- 安全报警：如果连续多次输入错误的指纹，系统会触发报警。
结论
基于51单片机的指纹锁系统设计，不仅提高了家庭安全的水平，也为用户提供了便捷的开锁方式。通过结合现代电子技术和生物识别技术，该系统在保证安全性的同时，也提供了良好的用户体验。随着技术的不断进步，未来指纹锁系统将更加智能化、多样化，为家庭安全提供更加可靠的保障。
原理图
PCB设计
希望你喜欢这个项目，并在构建过程中找到乐趣！如果你有任何问题或需要帮助，欢迎在评论区交流。
作者：Svan.
注意：本博文为不得在未经本人同意进行转载或者二次创作，违者必究！！！
博客主页：https://blog.csdn.net/weixin_51141489，需要源码或相关资料实物的友友请关注、点赞，私信吧！
阅读全文
