defs.h

 
//*****************************************************************************
//
// File Name  : 'avrlibdefs.h'
// Title    : AVRlib global defines and macros include file
// 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, regardless of specific implementation.
//
// This code is distributed under the GNU Public License
//    which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************
 
 
#ifndef AVRLIBDEFS_H
#define AVRLIBDEFS_H
 
//#define F_CPU 4000000
#define MEM_TYPE 1
 
// Code compatibility to new AVR-libc
// outb(), inb(), inw(), outw(), BV(), sbi(), cbi(), sei(), cli()
#ifndef outb
  #define outb(addr, data)  addr = (data)
#endif
#ifndef inb
  #define inb(addr)     (addr)
#endif
#ifndef outw
  #define outw(addr, data)  addr = (data)
#endif
#ifndef inw
  #define inw(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
 
//Math
#define sq(x) ((x)*(x))
#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
 
#endif