mydef.h

基于AVR的超声波测距程序

#ifndef _MyDef_h_
#define _MyDef_h_

#define FREQ 8     	//系统时钟 8M

#define P0 0
#define P1 1
#define P2 2
#define P3 3
#define P4 4
#define P5 5
#define P6 6
#define P7 7

#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long

#define Debug 1       // 串口调试开启

void delay_nms(uint ms); //若干毫秒延时
void delay_nus(uint us); //若干微秒延时 晶振4M 8M 12M 16M 有效



#endif