51 MCU project access control system

/**

 * Project Name: Access Control System

 * File name: main.h

 */

#ifndef _MAIN_H

#define _MAIN_H

sbit RELAY_PIN = P0^4;

sbit BUZZER_PIN = P0^6;

void sys_init();

void samplingDS1302();

void samplingUlt();

void initDispMode1();

void initDispMode2();

void initDispMode3();

void refreshTimeDisplay();

#endif

/**

 * Project Name: Access Control System

 * 

 * 7:00-22:00 works in mode 0 (automatic door state)

 * 22:00-7:00 works in mode 1 (password door state)

 * Difficulty: The relay disconnects after 5 seconds of connection

 * Buzzer alarm 3s

 * File name: main.c

 */

#include

#include

#include "stdint.h"

#include "timer.h"

#include "digitalTube.h"

#include "matrixKey.h"

#include "DS1302.h"

#include "EEPROM.h"

#include "ultrasonic.h"

#include "electromagneticDev.h"

#include "main.h"

volatile bit flag50ms = 0, flag200ms = 0, flag500ms = 0; //Task flag

bit workingMode = 1; //Working mode, initialization time is 06:59:00

uint8_t dispMode = 0; //Display mode in password door state {0, 1, 2, 3}

uint8_t code initPassword[7] = "654321"; //Initial password

uint8_t password[7]; //Current password

bit isOpen = 0; //Is the relay open?

volatile bit enBuzzer = 0;

sTime_t time;

static uint8_t wrongTimes = 0, passwdTmpIndex = 0; //!!!here

void main() {

    uint8_t cnt500ms = 0;

    sys_init();

    while (1) {

        if (flag50ms) {

            flag50ms = 0;

            keyDriver();

        }

        if (flag200ms) {

            flag200ms = 0;

            samplingDS1302();

            if (workingMode == 0) { //If working in automatic door state

                samplingUlt(); //Sampling ultrasonic module

            }

        }

        if (flag500ms) {

            flag500ms = 0;

            if (workingMode == 1) { //If working in password door state

                if (isOpen) { //If the door is detected to be open

                    if (cnt500ms == 10) {

                        cnt500ms = 0;

                        relay_off();

                        isOpen = 0;

                    } else {

                        cnt500ms++;

                    }

                }

            }

        }

    }

}

void sys_init() {

    tmr0_init(2);

    tmr1_specialInit();

    stc15_tmr2_init(1); //!!!

    DS1302_init();

    EEPROM_read(password, 0, sizeof (password)); //addr=0

    if (strncmp(password, "000000", 6) == 0) { //If it has not been initialized

        strncpy(password, initPassword, 6);

        EEPROM_write(initPassword, 0, sizeof (initPassword));

    }

}

void samplingDS1302() { //Sampling real time to control working mode

    static uint8_t preSec;

    DS1302_getRealTime(&time);

    if (time.hour == 0x07 && time.minute == 0x00) { //If it is 7:00

        workingMode = 0; //Working in automatic door state

        dispMode = 0; //!!!Display mode returns to 0

        wrongTimes = 0; //!!!

        passwdTmpIndex = 0; //!!!

    } else if (time.hour == 0x22 && time.minute == 0x00) { //If it is 22:00

        workingMode = 1; //Working in password door state

    }

    if (dispMode == 0) { //If the display mode is 0, update the display

        if (time.sec != preSec) { //Update the display if the seconds change

            preSec = time.sec;

            refreshTimeDisplay();

        }

    }

}

void samplingUlt() { //Working in the automatic door state, the distance measured by ultrasonic wave controls the opening and closing of the relay

    static uint8_t ultCnt200ms = 0;

    uint8_t dis;

    dis = ult_getDis();

    if (isOpen == 0) { //If it was closed before

        if (dis < 30) { //If the measured distance is less than 30cm

            relay_on();

            isOpen = 1;

        }

    } else if (isOpen == 1) {

        if (dis >= 30) {

            if (ultCnt200ms == 24) {

                ultCnt200ms = 0;

                relay_off();

                isOpen = 0;

            } else {

                ultCnt200ms++;

            }

        } else {

            ultCnt200ms = 0;

        }

    }

}

void keyAction(uint8_t keyCode) {    

    static uint8_t passwdTmp[7]; 

    if (workingMode == 0) //If working in automatic door mode, no response to buttons

        return;

    if (keyCode == 'q') { //If the confirm key is pressed

        if (passwdTmpIndex == 6) { //If a 6-digit password is entered

            passwdTmpIndex = 0; //!!!Reset write index

            if (dispMode == 1) { //If the current interface is the password verification interface

                if (strncmp(passwdTmp, password, 6) == 0) { //If the password matches successfully

                    dispMode = 0; //Return to the time display interface

                    refreshTimeDisplay(); //Redisplay the time

                    relay_on(); //Turn on the relay

                    isOpen = 1; //!!!!!!

                    wrongTimes = 0; //!!!The number of consecutive errors is reset to 0

                } else { //Password matching failed

                    if (wrongTimes >= 2) { //If the number of consecutive errors reaches 3 times

                        enBuzzer = 1;

                    } else {

                        wrongTimes++;

                    }

                    initDispMode1(); //Clear the input password

                }

            } else if (dispMode == 2) { //If the current page is the old password verification interface

                if (strncmp(passwdTmp, password, 6) == 0) { //If the password matches successfully

                    //passwdTmpIndex = 0; //reset

                    dispMode = 3; //Enter the new password input interface

                    initDispMode3();

                    wrongTimes = 0; //!!!The number of consecutive errors is reset to 0                    

                } else { //Password matching failed

                    if (wrongTimes == 2) { //If the number of errors reaches 3 times

                        enBuzzer = 1;

                        dispMode = 0; //!!! Return to the time display interface

                        refreshTimeDisplay();

                        wrongTimes = 0;

                    } else {

                        wrongTimes++;

                    }

                    initDispMode2(); //Clear the input password

                }

            } else if (dispMode == 3) { //If the current page is the new password input interface

                strncpy(password, passwdTmp, sizeof (passwdTmp)); //Update new password

                EEPROM_write(passwdTmp, 0, sizeof (passwdTmp)); //Write the new password to EEPROM

                dispMode = 0; //Return to the real-time display interface

                refreshTimeDisplay();

            }

        }

    } else if (keyCode == 's') { //If the setting key is pressed

        if (dispMode == 0) { //If it is a real-time display interface

            dispMode = 2; //Enter the old password verification interface

            initDispMode2();

        }

    } else if (keyCode == 'f') { //If the reset key is pressed

        strncpy(password, initPassword, 6); //Reset to the initial password

        EEPROM_write(initPassword, 0, sizeof (initPassword));

        wrongTimes = 0; //!!!The previous number of errors is reset to 0

    } else if (keyCode == 't') { //If the exit key is pressed

        if (dispMode == 2 || dispMode == 3) { //If in the old password verification interface or the new password input interface

            passwdTmpIndex = 0; //!!!

            dispMode = 0;

            refreshTimeDisplay();

        }

    } else if (0 <= keyCode && keyCode <= 9) { //If the number key pressed is 0-9

        if (dispMode == 0) { //If the previous display mode is 0, press any number key to enter the authentication interface

            dispMode = 1;

            initDispMode1();

        }

        if (passwdTmpIndex < 6) {

            passwdTmp[passwdTmpIndex] = keyCode + '0'; //!!!It is a character

            dspBuf[2 + passwdTmpIndex] = keyCode; //Update display

            passwdTmpIndex++; //!!!

        }

    }

}

void refreshTimeDisplay() {

    dspBuf[0] = time.hour >> 4;

    dspBuf[1] = time.hour & 0x0F;

    dspBuf[2] = 11; //delimiter

    dspBuf[3] = time.minute >> 4;

    dspBuf[4] = time.minute & 0x0F;

    dspBuf[5] = 11;

    dspBuf[6] = time.sec >> 4;

    dspBuf[7] = time.sec & 0x0F;

}

void initDispMode1() {

    dspBuf[0] = 11; //delimiter

    dspBuf[1] = 11;

    dspBuf[2] = 10;

    dspBuf[3] = 10;

    dspBuf[4] = 10;

    dspBuf[5] = 10;

    dspBuf[6] = 10;

    dspBuf[7] = 10;

}

void initDispMode2() {

    dspBuf[0] = 10; //Do not display

    dspBuf[1] = 11;

    dspBuf[2] = 10;

    dspBuf[3] = 10;

    dspBuf[4] = 10;

    dspBuf[5] = 10;

    dspBuf[6] = 10;

    dspBuf[7] = 10;

}

void initDispMode3() {

    dspBuf[0] = 11;

    dspBuf[1] = 10;

    dspBuf[2] = 10;

    dspBuf[3] = 10;

    dspBuf[4] = 10;

    dspBuf[5] = 10;

    dspBuf[6] = 10;

    dspBuf[7] = 10;

}

void tmr0_ISR() interrupt 1 {

    static uint8_t cnt2ms = 0, cnt1 = 0;

    TL0 = tmr0LowByte;

    TH0 = tmr0HighByte;

    if (cnt2ms == 99) {

        cnt2ms = 0;

        flag200ms = 1;

    } else {

        cnt2ms++;

    }

    if (cnt1 == 249) { //Timer 500ms

        cnt1 = 0;

        flag500ms = 1;

    } else {

        cnt1++;

    }

    if (cnt2ms % 25 == 0) {

        flag50ms = 1;

    }

    digitalTubeScan();

    if (cnt2ms & 1)

        keyScan();

}

/**

 * stc15 series MCU timer 2

 * Interrupt number 12

 * Function: drive buzzer

 */

void tmr2_ISR() interrupt 12 { //stc15 MCU timer 2

    static uint16_t cnt1ms = 0; //set to 3000ms

    if (enBuzzer) { //If the buzzer needs to sound

        buzzer_toggle();

        if (cnt1ms == 2999) { //If the buzzer sounds for 3 seconds

            enBuzzer = 0; //Disable the buzzer

            cnt1ms = 0;

        } else {

            cnt1ms++;

        }

    }

}