main.h

超声波的发射和接收

#ifndef __MAIN_H__
#define __MAIN_H__

#define  _Nop()  _nop_()
#define uint  unsigned int
#define uchar unsigned char

sbit ad_A=P3^0;    //A
sbit ad_B=P3^1;    //B
sbit ad_C=P3^2;    //C
sbit START=P3^6;    //WR
sbit OE=P3^7;       //RD
sbit EOC=P3^3;      //EOC  CS-GND  CLK-ALE

/********************键盘接口*************************/
#define KEY1   (!(P3_5))
#define KEY2   (!(P3_6))
#define KEY3   (!(P3_7))

#endif