红外传感器简易停车场进出车位管理系统

利用红外传感器制作停车场进出车位管理系统

//代码/
#include<reg51.h>
sfr P0M0=0x93;
sfr P0M1=0x94;
sfr P1M0=0x91;
sfr P1M1=0x92;
sfr P2M0=0x95;
sfr P2M1=0x96;
sfr P3M0=0xb1;
sfr P3M1=0xb2;
const unsigned char seg7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
sbit car_in=P1^0;
sbit car_out=P1^1;
sbit en1=P2^6;
sbit en2=P2^7;
void ms_delay(unsigned int t)
{
unsigned int i;
for(t;t>0;t–)
for(i=110;i>0;i–)
;
}
void display(int n)
{
char b2,b1;
b2=n/10;
b1=n%10;
P0=seg7[b2];
en2=0;
ms_delay(10);
en2=1;
P0=seg7[b1];
en1=0;
ms_delay(10);
en1=1;
}
main()
{
int num=99;
P0M1=0xff;
P0M0=0xff;
P1M1=0x03;
P1M0=0x00;
display(num);
while(1)
{
if(car_in0)
{
ms_delay(100);
if(car_in0)
{
num–;
}
}
if(car_out0)
{
ms_delay(100);
if(car_out0)
{
num++;
}
}
if(num>99)
{
num=99;
}
else if(num<0)
{
num=0;
}
display(num);
}
} https://mermaidjs.github.io/