delay.h

用按键来产生不同的频率

#ifndef DELAY_H
#define DELAY_H

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int


void Delay_xMs(uchar x)
{
	uchar i,j;
	for( i =0;i < x;i++ )for( j =0;j<3;j++ );
} 
#endif