global.h

来自「ATmega s MMC/SD card C file」· C头文件 代码 · 共 44 行

//*****************************************************************************
//
// File Name	: 'global.h'
// Title		: AVR project global include 
// Author		: Pascal Stang
// Created		: 7/12/2001
// Revised		: 9/30/2002
// Version		: 1.1
// Target MCU	: Atmel AVR series
// Editor Tabs	: 4
//
//	Description : This include file is designed to contain items useful to all
//					code files and projects.
//
// This code is distributed under the GNU Public License
//		which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

#ifndef GLOBAL_H
#define GLOBAL_H

// global AVRLIB defines
#include "avrlibdefs.h"
// global AVRLIB types definitions
#include "avrlibtypes.h"

// project/system dependent defines

// CPU clock speed
#define F_CPU        18432000               		// 18.432MHz processor
//#define F_CPU        16000000               		// 16MHz processor
//#define F_CPU        14745000               		// 14.745MHz processor
//#define F_CPU        8000000               		// 8MHz processor
//#define F_CPU        7372800               		// 7.37MHz processor
//#define F_CPU        4000000               		// 4MHz processor
//#define F_CPU        3686400               		// 3.69MHz processor

// CYCLES_PER_US is used by some short delay loops
#define CYCLES_PER_US ((F_CPU+500000)/1000000) 	// cpu cycles per microsecond

#endif