功能介绍：
0.本系统采用STC89C52作为单片机
1.LCD12864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.系统通过LCD12864大屏显示车位的状态
4.采用DC002作为电源接口可直接输入5V给整个系统供电
5.车位的占有情况通过八个拨动开关来模拟，且每个车位附有一个LED作为指示灯
原理图：
PCB ：
主程序：
#include <reg52.h>#include <intrins.h>#include <stdio.h>#include "delay.h"#include "lcd12864.h"#define LED_PORT P1#define PARKING_SPACE_PORT P2xdata unsigned char dis1[19];unsigned char disFlag = 1; //显示标志unsigned char i;bit reportFlag = 1;//上报标志unsigned char parking_space_port_buf;unsigned char emptyCntA = 0; //空车位计数unsigned char emptyCntB = 0; //空车位计数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);unsigned char BitCount1(unsigned char n); //计算二进制1的个数void main(void){unsigned char Cnt = 0;Timer0_Init(); //定时器0初始化UART_Init();DelayMs(100); //延时有助于稳定LCD12864_Init();LCD12864_DrawHz(1, 0, "极寒钛停车场");LCD12864_DrawHz(0, 1, "车位总和: 8 ");LCD12864_DrawHz(0, 2, "A 区车位剩余: ");LCD12864_DrawHz(0, 3, "B 区车位剩余: ");while (1){LED_PORT = PARKING_SPACE_PORT;if (disFlag == 1) //定时显示{disFlag = 0; //标志位清零parking_space_port_buf = PARKING_SPACE_PORT;emptyCntA = BitCount1(parking_space_port_buf & 0x0F);sprintf(dis1, "%d ", (int)emptyCntA);LCD12864_DrawHz(7, 2, dis1);emptyCntB = BitCount1(parking_space_port_buf & 0xF0);sprintf(dis1, "%d ", (int)emptyCntB);LCD12864_DrawHz(7, 3, dis1);}if (reportFlag == 1) //入库上报一次数据{reportFlag = 0; //清楚标志sprintf(dis1, "A_Empty:%d B_Empty:%d", (int)emptyCntA, (int)emptyCntB); //打印UART_SendStr(dis1, 19);UART_SendStr("\r\n", 2);}}}unsigned char BitCount1(unsigned char n){unsigned char c =0 ; // 计数器for (c =0; n; n >>=1) // 循环移位c += n &1 ; // 如果当前位是1，则计数器加1return c ;}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 20msTL0 = (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 20msTL0 = (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 11.0592MHzTL1 = 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{if (RI) //判断是接收中断产生{RI = 0; //标志位清零}}
仿真演示视频：
/video/BV1ZP411j7TQ/
实物演示视频：
/video/BV1j24y1972k/
