基于ds18b20的溫度檢測

ID:657857 · 發(fā)表于 2019-12-6 21:55

部分代碼：
#include <reg51.h>

#define uchar unsigned char
#define uint unsigned int

//--定義使用的IO口--//
#define GPIO_DIG P1 //段選
#define GPIO_PLACE P2 //位選

sbit K1=P3^6;
sbit K2=P3^7;

sbit DS=P3^0;          //define interface
signed long int temp;          // variable of temperature

uchar state=0;

unsigned char code DIG_PLACE[8] = {
0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//位選控制查表的方法控制
unsigned char code DIG_CODE[] = {
0xFC,  //"0"
            0x60,  //"1"
            0xDA,  //"2"
            0xF2,  //"3"
            0x66,  //"4"
            0xB6,  //"5"
            0xBE,  //"6"
            0xE0,  //"7"
            0xFE,  //"8"
            0xF6,  //"9"
            0xEE,  //"A"
            0x3E,  //"B"
            0x9C,  //"C"
            0x7A,  //"D"
            0x9E,  //"E"
            0x8E,  //"F"
            0x6E,  //"H"
            0x1C,  //"L"
            0xEC,  //"n"
            0x7C,  //"u"
            0xCE,  //"P"
            0x3A,  //"o"
            0x02,  //"-"
            0x00,  //熄滅
            0x00  //自定義
                     };
unsigned char DisplayData[8];
//用來存放要顯示的8位數(shù)的值

void delay(uint count)    //delay
{
  uint i;
  while(count)
  {
i=200;
while(i>0)
i--;
count--;
  }
}
void dsreset(void)    //send reset and initialization command
{
  uint i;
  DS=0;
  i=103;
  while(i>0)i--;
  DS=1;
  i=4;
  while(i>0)i--;
}

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