基于51单片机智能停车场管理车位引导系统蓝牙手机通信proteus仿真原理图PCB

功能：
0.本系统采用STC89C52作为单片机
1.系统采用LCD1602液晶实时显示当前车位状态
2.蓝牙串口间隔5秒发送一次当前车位状态
3.车位检测传感器采用的是红外光电模块，该模块的检测距离可达到80cm左右，能满足该项目的需求。
4.采用DC002作为电源接口可直接输入5V给整个系统供电

原理图：

PCB ：

主程序：

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

sbit PARKING_SPACE_1 = P3^6; //接口定义
sbit PARKING_SPACE_2 = P3^5;
sbit PARKING_SPACE_3 = P3^4;


xdata unsigned char dis0[16]; //定义显示区域临时存储数组
xdata unsigned char dis1[16];

unsigned char disFlag = 0; //显示标志
unsigned char i;

bit reportFlag = 0;          //上报标志
unsigned char occupiedFlag1 = 0; //位置标志
unsigned char occupiedFlag2 = 0; //位置标志
unsigned char occupiedFlag3 = 0; //位置标志
unsigned char occupiedNum = 0;     //占用总数

void Timer0_Init(void); //函数声明
void UART_SendStr(unsigned char *s, unsigned char length);
void UART_Init(void);
void UART_SendByte(unsigned char dat);

void main(void)
{
    Timer0_Init(); //定时器0初始化
    UART_Init();

    LCD_Init();  //初始化液晶
    DelayMs(20); //延时有助于稳定
    LCD_Clear(); //清屏


    while (1)
    {
        if (PARKING_SPACE_1 == 0) //车位检测到
        {
            occupiedFlag1 = 1;
        } //标志
        else
        {
            occupiedFlag1 = 0;
        }

        if (PARKING_SPACE_2 == 0) //车位检测到
        {
            occupiedFlag2 = 1;
        } //标志
        else
        {
            occupiedFlag2 = 0;
        }

        if (PARKING_SPACE_3 == 0) //车位检测到
        {
            occupiedFlag3 = 1;
        } //标志
        else
        {
            occupiedFlag3 = 0;
        }

        if (disFlag == 1) //定时显示
        {
            disFlag = 0; //标志位清零
            if (occupiedFlag1 == 1)
            {
                LCD_DispStr(0, 1, "P ");
            } //显示占用
            else
            {
                LCD_DispStr(0, 1, "N ");
            }

            if (occupiedFlag2 == 1)
            {
                LCD_DispStr(2, 1, "P ");
            } //显示占用
            else
            {
                LCD_DispStr(2, 1, "N ");
            }

            if (occupiedFlag3 == 1)
            {
                LCD_DispStr(4, 1, "P ");
            } //显示占用
            else
            {
                LCD_DispStr(4, 1, "N ");
            }
            occupiedNum = occupiedFlag1 + occupiedFlag2 + occupiedFlag3;                      //占用总数
            sprintf(dis0, "1 2 3  P:%d  N:%d ", (int)occupiedNum, (int)(3 - occupiedNum)); //打印
            LCD_DispStr(0, 0, dis0);                                           //显示
        }

        if (reportFlag == 1) //入库上报一次数据
        {
            reportFlag = 0; //清楚标志
            sprintf(dis1, "P:%d  N:%d ", (int)occupiedNum, (int)(3 - occupiedNum)); //打印

            if (occupiedFlag1 == 1)
            {
                UART_SendStr("N01 Parking ", 12);
            } //发送占用
            else
            {
                UART_SendStr("N01 Void    ", 12);
            }
            UART_SendStr("\r\n", 2); //换行
            DelayMs(1);

            if (occupiedFlag2 == 1)
            {
                UART_SendStr("N02 Parking ", 12);
            } //发送占用
            else
            {
                UART_SendStr("N02 Void    ", 12);
            }
            UART_SendStr("\r\n", 2); //换行
            DelayMs(1);

            if (occupiedFlag3 == 1)
            {
                UART_SendStr("N03 Parking ", 12);
            } //发送占用
            else
            {
                UART_SendStr("N03 Void    ", 12);
            }
            UART_SendStr("\r\n", 2); //换行
            DelayMs(1);

            UART_SendStr(dis1, 9);
            UART_SendStr("\r\n", 2);
        }
    }
}

void Timer0_Init(void)
{
    TMOD |= 0x01;                //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响
    TH0 = (65536 - 18432) / 256; //重新赋值 20ms
    TL0 = (65536 - 18432) % 256;
    EA = 1;  //总中断打开
    ET0 = 1; //定时器中断打开
    TR0 = 1; //定时器开关打开
}

void Timer0_Interrupt(void) interrupt 1
{
    static unsigned int time_20ms = 0;


    TH0 = (65536 - 18432) / 256; //重新赋值 20ms
    TL0 = (65536 - 18432) % 256;

    time_20ms++;

    if (time_20ms > 500)
    {
        reportFlag = 1; //串口上报标志 调试使用的
        time_20ms = 0;
    }

    if (time_20ms % 50 == 0) //定时
    {
        disFlag = 1;
    }
}

void UART_Init(void)
{
    SCON = 0x50;  // SCON: 模式 1, 8-bit UART, 使能接收
    TMOD |= 0x20; // TMOD: timer 1, mode 2, 8-bit 重装
    TH1 = 0xFD;   // TH1:  重装值 9600 波特率 晶振 11.0592MHz
    TL1 = TH1;
    TR1 = 1; // TR1:  timer 1 打开
    EA = 1;  //打开总中断
    ES = 1;  //打开串口中断
}

void UART_SendByte(unsigned char dat)
{
    unsigned char time_out;
    time_out = 0x00;
    SBUF = dat;                       //将数据放入SBUF中
    while ((!TI) && (time_out < 100)) //检测是否发送出去
    {
        time_out++;
        DelayUs10x(2);
    }       //未发送出去 进行短暂延时
    TI = 0; //清除ti标志
}

void UART_SendStr(unsigned char *s, unsigned char length)
{
    unsigned char cnt;
    cnt = 0x00;
    while (cnt < length) //发送长度对比
    {
        UART_SendByte(*s); //放松单字节数据
        s++;              //指针++
        cnt++;            //下一个++
    }
}

void UART_Interrupt(void) interrupt 4 //串行中断服务程序
{
    unsigned char r_buf;
    if (RI) //判断是接收中断产生
    {
        RI = 0; //标志位清零
        r_buf = SBUF;
    }
    if (TI) //如果是发送标志位，清零
    {
        TI = 0;
    }
}

仿真演示视频：
https://www.bilibili.com/video/BV1Nd4y1z7rK/

实物演示视频：
https://www.bilibili.com/video/BV1MT4y1z7LS/