ultrasonic11.c

来自「LCD液晶驱动程序代码」· C语言 代码 · 共 113 行

#include<P89V51.H>
#include<LCD.C>
sbit P1_6 =P1^6;
sbit P1_7 =P1^7;
unsigned char a,b;
unsigned int c;
char count=0;
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);


/////////////////////////////////////////////////////
void timer0(void) interrupt 1 using 1	 //定时发射超声波250us//定时器0
	{
		count=count+1;
		if(count==1)
	  		P1_6=0;
		if(count>5)
			{	P1_6=1;
				count=0;
				TMOD=0x01;
	  	TH0=(65535-500)/256;
	  	TL0=(65535-500)%256;  //定时250us发送声波
		
	  	//IP=0x02;			  //中断优先级

	  	ET0=1;
	    TR0=1;
				//IT1=1;
				//EX1=1;
				//IE1=1;
					
			}

	}


//////////////////////////////////////////////////////


////////////////////////////////////////////////////////
void counter(void) interrupt 2 using 2	 //测出往返时间
	{
		IE1=0;
		TR0=0;

		a=TL0;
		b=TH0;

		TMOD=0x01;
	  	TH0=(65535-500)/256;
	  	TL0=(65535-500)%256;  //定时250us发送声波
		
	  	//IP=0x02;			  //中断优先级
 
	    TR0=1;
		ET0=1;
  		//EA=0;
		P1_7=!P1_7;
		//IE1=1;
	}


void Delay(unsigned char c,unsigned char d,unsigned char e)
{
 unsigned char i,j,k;
 for(i=0;i<=c;i++)
 {
   for(j=0;j<=d;j++)
    for(k=0;k<=e;k++);
 }
}
//////////////////////////////////////////////////////


main()
{	   



	PSB=1;
    RST=0;
	Delay(100,100,1);
	RST=1;
    Delay(100,100,1);
    EA=0;
	LCMInit();
	Delay(100,100,1);
	TMOD=0x01;
	  	TH0=(65535-500)/256;
	  	TL0=(65535-500)%256;  //定时250us发送声波
		
	  	//IP=0x02;			  //中断优先级
        EA=1;
	  	ET0=1;
	    TR0=1;

		P1_6=0;
	    P1_6=0;
   while(1)
	{
		;//P1_6=0;
		/*
     	c=((unsigned int)b<<8)+a; 
		DisplayOneChar(0,0,0x41);
		DisplayInt(1,0,c);
	    Delay(100,100,5);
		WriteCommandLCM(0x02,1);*/
	}


}