ex.c

18b20温度采集,keil C51程序

#include "reg51.H"
#include "ZLG7290.H"

extern unsigned int GET_TEMPER();
extern unsigned char TEMPER_COV(unsigned int j);
void DELAY();
void DELAY1();
bujindainji() ;
sbit RES = P1^5;
sbit P10=P1^0;
sbit P12=P1^2;
sbit P11=P1^1;
sbit P13=P1^3;
sbit P14=P1^4;
void main( void )
{
unsigned int kk;
unsigned int k;
int t,x=0;



        RES = 1;
        while (1)
	{
                kk=GET_TEMPER();
                k=TEMPER_COV(kk);
                DELAY();
                ZLG7290_SendCmd(0x60,k%16);
		DELAY();
		ZLG7290_SendCmd(0x61,k/16);
		DELAY();
                t=k-12;    /*大于20°好使*/
                if( t>=30)
                {
                  x=1;
                  P14=0; 
                  bujindainji();

                  }
                else
                   {
                     
                     P14=0;
                     x=0;    
                   }
        }
}
void DELAY()
{
	unsigned char i,j;
	for(i=0;i<10;i++)
		for(j=0;j<10;j++);
}

bujindainji()
{
 //	while(1)
	{
		P1=0x08;	       //A
		DELAY1();
		P1=0x04;	       //B
		DELAY1();
                P1=0x02;	       //C
		DELAY1();
	        P1=0x01;	       //D
		DELAY1();

	}
}
void DELAY1()
{
unsigned char i,j;
	for(i=0;i<200;i++)
		for(j=0;j<250;j++);
}