4.c

上传一些

#include<reg52.h>
#include<intrins.h>
sbit m=P2^5;
sbit feng=P2^3;
unsigned char flag,flag1,flag2,flag3,h,t;
unsigned int x,y;
void main()
		{
			flag=0;
			m=1;
			t=0xff;
			h=0xfe;
			P1=0xff;
			feng=1;
			TMOD=0x01;
			EA=1;
			ET0=1;
			TH0=0x4c;
			TL0=0x00;
			TR0=1;
			while(1)
				{
					if(flag1==1)
						{
							flag1=0;
							P1=t;
							feng=0;				
						}
					feng=1;
				}
		}


void inter(void) interrupt 1 using 1
		{
		
			TH0=0x4c;
			TL0=0x00;
			flag++;
			if(flag==20)
				{
					flag=0;
					flag1=1;
					t--;
					if(t==0x00) t=0xff;
				}
		}