基于51单片机简单病床呼叫系统

Posted 2021-09-13 perseverance52

基于51单片机简单病床呼叫系统

• 基于51单片机设计
• 主要硬件：AT89C52 扬声器、按键
• 采用16个按键控制16个床位系统设计
  

实现代码

#include<reg51.h>
#define uchar unsigned char
#define uint insigned int
uchar code LED[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};//共阴数码管断码
uchar Buffer[]={0x3F,0x3F};
sbit CLAER=P3^1;
sbit BUZZ=P3^0;
uchar key_scan();
void key_count(uchar num);
void disp();
void delay(uchar s);
void buzz_on();
void main()
{
uchar temp;
while(1)
	{
disp();
temp=key_scan();
	if(temp!=0xFF)
	  {
		  key_count(temp+1);
			while(CLAER==1)
			{
			buzz_on();
			disp( );
			}
		Buffer[0]=0x3F;
		Buffer[1]=0x3F;
		BUZZ=1;
		}
	}
}
void disp()
{
	uchar i,w;
	w=0x01;
  for(i=0;i<2;i++)
    {
    P2=~w;
    w<<=1;
    P0=Buffer[i];
    delay(10);
    P2=0xFF;
    }
}		
uchar key_scan(void)
{
	uchar key=0xFF,cord_h,cord_1;
	P1=0x0F;
	cord_h=P1&0x0F;
	if(cord_h!=0x0F)
	{
	delay(10);
	if(cord_h!=0x0F)
	  { 
		cord_h=P1&0x0F;
		P1=0xF0;
		cord_1=P1&0xF0;
		while((P1&0xF0)!=0xF0);
		switch(cord_h+cord_1)
			{
			case 0xEE:key=0;break;//S1
			case 0xED:key=1;break;//S2
			case 0xEB:key=2;break;//S3
			case 0xE7:key=3;break;//S4
			case 0xDE:key=4;break;//S5
			case 0xDD:key=5;break;//S6
			case 0xDB:key=6;break;//S7
			case 0xD7:key=7;break;//S8
			case 0xBE:key=8;break;//S9
			case 0xBD:key=9;break;//S10
			case 0xBB:key=10;break;//S11
			case 0xB7:key=11;break;//S12
			case 0x7E:key=12;break;//S13
			case 0x7D:key=13;break;//S14
			case 0x7B:key=14;break;//S15
			case 0x77:key=15;break;//S16
			default: key=0xFF;break;
			}
		}
	}
	  return(key);
  }
void key_count(uchar num)
 {
	Buffer[0]=LED[num/10];
	Buffer[1]=LED[num%10];
  }
void buzz_on()
{
BUZZ=0;
delay(1);
BUZZ=1;
delay(1);
}
void delay(uchar s)
{
	int j;
while(s--)
	for(j=0;j<20;j++);
  }

• 编译信息

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链接：https://pan.baidu.com/s/15ylev1-18hXnk8fKSQ-C1A 
提取码：78i7