基于单片机设计的指纹锁(读取、录入、验证指纹)

#include <reg52.h>
#include <stdio.h>
#include <intrins.h>
#include "lcd1602.h"

#define uchar unsigned char
#define uint unsigned int

// 指纹识别相关定义
#define FINGERPRINT_ADD    0x01   // 添加指纹命令
#define FINGERPRINT_DEL    0x02   // 删除指纹命令
#define FINGERPRINT_VERIFY 0x03   // 验证指纹命令
#define FINGERPRINT_SUCCESS 0x00  // 指纹验证成功返回值
#define FINGERPRINT_FAIL 0x01     // 指纹验证失败返回值

// 步进电机相关定义
sbit IN1 = P2^0;
sbit IN2 = P2^1;
sbit IN3 = P2^2;
sbit IN4 = P2^3;

// 按键相关定义
sbit Key1 = P1^0;  // 录入指纹按键
sbit Key2 = P1^1;  // 删除指纹按键

uchar comdata[19] = {0};   // 串口接收数据缓冲区
uchar fingerStatus = 0;   // 指纹识别状态，0：未识别，1：已识别
uchar fingerprintIndex = 1;  // 指纹索引

void delay(uint ms) {
    while(ms--) {
        uint xms = 120;  // 延时大概1ms
        while(xms--);
    }
}

void uartInit() {
    TMOD = 0x20;   // 设置T1工作在方式2，8位定时/计数器
    SCON = 0x50;  // 设置串口工作在模式1，波特率9600
    TH1 = 0xFD;   // 波特率为9600时的T1重装值
    TL1 = 0xFD;
    TR1 = 1;      // 启动T1
}

void uartSendByte(uchar dat) {
    SBUF = dat;   // 将数据送入UART发送缓冲区
    while(!TI);   // 等待UART发送完毕
    TI = 0;       // 清除发送完成标志位
}

void uartSendString(uchar *str) {
    while(*str) {
        uartSendByte(*str);
        str++;
    }
}

void uartInterrupt() interrupt 4 using 1 {
    uchar c;
    if (RI) {  // 接收到了数据
        RI = 0;  // 清除接收中断标志位
        c = SBUF;  // 读取接收到的数据

        if (c == 0xEF && comdata[0] != 0xEF) {  // 接收到帧头
            comdata[0] = 0xEF;
            comdata[1] = c;
        } 
        else if (comdata[1] == 0x01 && comdata[2] == 0xF5) {  // 接收到返回数据长度
            comdata[2] = c;
        }
        else if (comdata[2] != 0) {  // 接收到数据
            comdata[comdata[2]] = c;
            if (comdata[2] == 18) {  // 数据接收完毕
                fingerStatus = comdata[9];
            }
        }
    }
}

void fingerPrintAdd(uchar index) {
    uchar temp[] = {0xEF, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0x00, 0x07, 0x09, index, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x1E, 0x00, 0x2C};
    uchar checkSum = 0;
    
    for (uint i = 2; i < 19; i++) {
        checkSum += temp[i];
        uartSendByte(temp[i]);
    }
    
    temp[19] = (~checkSum) + 1;
    uartSendByte(temp[19]);
}

void fingerPrintDelete(uchar index) {
    uchar temp[] = {0xEF, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0x02, 0x00, 0x03, 0x0C, index, 0x00, 0x10};
    uchar checkSum = 0;
    
    for (uint i = 2; i < 13; i++) {
        checkSum += temp[i];
        uartSendByte(temp[i]);
    }
    
    temp[13] = (~checkSum) + 1;
    uartSendByte(temp[13]);
}

void fingerPrintVerify() {
    uchar temp[] = {0xEF, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0x03, 0x00, 0x03, 0x03, 0x00, 0x07};
    uchar checkSum = 0;
    
    for (uint i = 2; i < 12; i++) {
        checkSum += temp[i];
        uartSendByte(temp[i]);
    }
    
    temp[12] = (~checkSum) + 1;
    uartSendByte(temp[12]);
}

void stepperMotorRotate(uint steps, uchar direction) {
    uint i;

    for (i = 0; i < steps; i++) {
        IN1 = 1;
        delay(1);
        IN1 = 0;
        IN2 = 1;
        delay(1);
        IN2 = 0;
        IN3 = 1;
        delay(1);
        IN3 = 0;
        IN4 = 1;
        delay(1);
        IN4 = 0;
    }

    delay(1000);

    if (direction == 1) {  // 正转
        for (i = 0; i < 512; i++) {
            IN4 = 1;
            delay(1);
            IN4 = 0;
            IN3 = 1;
            delay(1);
            IN3 = 0;
            IN2 = 1;
            delay(1);
            IN2 = 0;
            IN1 = 1;
            delay(1);
            IN1 = 0;
        }
    } else {  // 反转
        for (i = 0; i < 512; i++) {
            IN1 = 1;
            delay(1);
            IN1 = 0;
            IN2 = 1;
            delay(1);
            IN2 = 0;
            IN3 = 1;
            delay(1);
            IN3 = 0;
            IN4 = 1;
            delay(1);
            IN4 = 0;
        }
    }
}

void main() {
    lcdInit();
    uartInit();

    EA = 1;   // 开启总中断
    ES = 1;   // 开启串口中断

    while (1) {
        if (Key1 == 0) {  // 录入指纹按键按下
            fingerPrintAdd(fingerprintIndex);
            lcdClear();
            lcdSetCursor(0, 0);
            lcdPrint("Add Finger");
            delay(1000);
            if (fingerStatus == FINGERPRINT_SUCCESS) {  // 指纹录入成功
                lcdClear();
                lcdSetCursor(0, 0);
                lcdPrint("Add Success");
                delay(1000);
                fingerprintIndex++;
            } else {  // 指纹录入失败
                lcdClear();
                lcdSetCursor(0, 0);
                lcdPrint("Add Fail");
                delay(1000);
            }
            while (Key1 == 0);  // 等待按键释放
        }

        if (Key2 == 0) {  // 删除指纹按键按下
            fingerPrintDelete(fingerprintIndex - 1);
            lcdClear();
            lcdSetCursor(0, 0);
            lcdPrint("Del Finger");
            delay(1000);
            if (fingerStatus == FINGERPRINT_SUCCESS) {  // 指纹删除成功
                lcdClear();
                lcdSetCursor(0, 0);
                lcdPrint("Del Success");
                delay(1000);
                if (fingerprintIndex > 1) {
                    fingerprintIndex--;
                }
            } else {  // 指纹删除失败
                lcdClear();
                lcdSetCursor(0, 0);
                lcdPrint("Del Fail");
                delay(1000);
            }
            while (Key2 == 0);  // 等待按键释放
        }

        fingerPrintVerify();
        if (fingerStatus == FINGERPRINT_SUCCESS) {  // 指纹验证成功
            lcdClear();
            lcdSetCursor(0, 0);
            lcdPrint("Success");
            delay(500);
            stepperMotorRotate(64, 1);  // 正转开锁
        } else if (fingerStatus == FINGERPRINT_FAIL) {  // 指纹验证失败
            lcdClear();
            lcdSetCursor(0, 0);
            lcdPrint("Fail");
            delay(500);
        }
    }
}