avrlibdefs.h

来自「AVRMEG32编写的一个项目代码,里面包含一般应用的模块.」· C头文件 代码 · 共 76 行

/*! \file avrlibdefs.h \brief AVRlib global defines and macros. */
//*****************************************************************************
//
// File Name	: 'avrlibdefs.h'
// Title		: AVRlib global defines and macros include file
// Created		: 
// Revised		: 
// Version		: 1.0
// Target MCU	: Atmel AVR series
// Editor Tabs	: 4
//
//	Description : This include file is designed to contain items useful to all
//					code files and projects, regardless of specific implementation.
//
//*****************************************************************************


#ifndef AVRLIBDEFS_H
#define AVRLIBDEFS_H
// Code compatibility to new AVR-libc
// outb(), inb(), BV(), sbi(), cbi(), sei(), cli()
#ifndef outb
	#define	outb(addr, data)	addr = (data)
#endif
#ifndef inb
	#define	inb(addr)			(addr)
#endif
#ifndef BV
	#define BV(bit)			(1<<(bit))
#endif
#ifndef cbi
	#define cbi(reg,bit)	reg &= ~(BV(bit))
#endif
#ifndef sbi
	#define sbi(reg,bit)	reg |= (BV(bit))
#endif
#ifndef cli
	#define cli()			__asm__ __volatile__ ("cli" ::)
#endif
#ifndef sei
	#define sei()			__asm__ __volatile__ ("sei" ::)
#endif

// support for individual port pin naming in the mega128
// see port128.h for details

/*
#ifdef __AVR_ATmega128__
// not currently necessary due to inclusion
// of these defines in newest AVR-GCC
// do a quick test to see if include is needed
#ifndef PD0
	#include "port128.h"
#endif
#endif
*/

// use this for packed structures
// (this is seldom necessary on an 8-bit architecture like AVR,
//  but can assist in code portability to AVR)

//#define GNUC_PACKED __attribute__((packed))
/*
// port address helpers
#define DDR(x) ((x)-1)    // address of data direction register of port x
#define PIN(x) ((x)-2)    // address of input register of port x
*/
// MIN/MAX/ABS macros
#define MIN(a,b)			((a<b)?(a):(b))
#define MAX(a,b)			((a>b)?(a):(b))
#define ABS(x)				((x>0)?(x):(-x))
// constants
#define PI		3.14159265359

#endif