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標(biāo)題: 基于單片機(jī)的病房呼叫系統(tǒng)（十六個(gè)床位） [打印本頁]

作者: 努力努力在努力z 時(shí)間: 2019-7-8 22:57
標(biāo)題: 基于單片機(jī)的病房呼叫系統(tǒng)（十六個(gè)床位）
#include <reg51.h>
#define uint unsigned int
#define uchr unsigned char
sbit led0=P2^2;
sbit buzzer=P2^3;
sbit dula=P2^6;             //聲明段選線選通端
sbit wela=P2^7;             //聲明位選線選通端
sbit clear=P3^4;
uchr key,shi,ge,count;
uchr code tab[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,
0x76,0x79,0x38,0x3f};
/*延時(shí)子函數(shù)，xms為形參*/
void delay(uint xms)
{
uint x,y;
for(x=xms;x>0;x--)
      for(y=110;y>0;y--);
}

/*矩陣鍵盤掃描子程序*/
void matrixkeyscan()
{
uint temp;
P3=0xf7;                            //給P3口賦值
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)                      //檢測(cè)是否有鍵按下
{
      delay(6);                      //延時(shí)去抖
      temp=P3;
      temp=temp&0xf0;
      if(temp!=0xf0)                //再次檢測(cè)是否有鍵按下
      {
         temp=P3;
         switch(temp)
         {
            case 0x77:
                  key=1;
                  break;
            case 0xb7:
                  key=2;
                  break;
            case 0xd7:
                  key=3;
                  break;
            case 0xe7:
                  key=4;
                  break;             //判斷按下的是哪個(gè)鍵
         }
         while(temp!=0xf0)
         {
            temp=P3;
            temp=temp&0xf0;
         }                         //等待按鍵釋放
      }
}
P3=0xfb;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
      delay(6);
      temp=P3;
      temp=temp&0xf0;
      if(temp!=0xf0)
      {
         temp=P3;
         switch(temp)
         {
case 0x7b:
                  key=5;
                  break;
            case 0xbb:
                  key=6;
                  break;
            case 0xdb:
                  key=7;
                  break;
            case 0xeb:
                  key=8;
                  break;
         }
         while(temp!=0xf0)
         {
            temp=P3;
            temp=temp&0xf0;
         }
      }
}
P3=0xfd;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
      delay(6);
      temp=P3;
      temp=temp&0xf0;
      if(temp!=0xf0)
      {
         temp=P3;
         switch(temp)
         {
            case 0x7d:
                  key=9;
                  break;
            case 0xbd:
                  key=10;
                  break;
            case 0xdd:
                  key=11;
                  break;
            case 0xed:
                  key=12;
                  break;
         }
         while(temp!=0xf0)
         {
            temp=P3;
            temp=temp&0xf0;
         }
      }
}
P3=0xfe;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
      delay(6);
      temp=P3;
      temp=temp&0xf0;
      if(temp!=0xf0)
      {
         temp=P3;
         switch(temp)
         {
            case 0x7e:
                  key=13;
                  break;
            case 0xbe:
                  key=14;
                  break;
            case 0xde:
                  key=15;
                  break;
            case 0xee:
                  key=16;
                  break;
         }
         while(temp!=0xf0)
         {
            temp=P3;
            temp=temp&0xf0;
         }
      }
}
}
/*主函數(shù)*/
void alarm()
{
buzzer=~buzzer;
led0=~led0;
delay(30);
}
void display(uchr num)
{
if(key!=0)          //若有鍵按下，則進(jìn)入該循環(huán)進(jìn)行處理
      {

         dula=1;
         P0=tab[num/10];
         dula=0;
         P0=0x00;
         wela=1;
         P0=0xfe;
         wela=0;
         delay(100);

         dula=1;
         P0=tab[num%10];
         dula=0;
         P0=0x00;
   wela=1;
   P0=0xfd;
   wela=0;
   delay(100);
   alarm();
}
}
void main()
{
P0=0x00;
while(1)
{
matrixkeyscan();
display(key);
}
}

作者: admin 時(shí)間: 2019-7-10 18:19
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