source: rtos_arduino/trunk/arduino_lib/hardware/arduino/samd/cores/arduino/wiring_constants.h@ 136

/*
  Copyright (c) 2014 Arduino.  All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef _WIRING_CONSTANTS_
#define _WIRING_CONSTANTS_

#ifdef __cplusplus
extern "C"{
#endif // __cplusplus

#define true            (0x1)
#define false           (0x0)

#define PI 3.1415926535897932384626433832795
#define HALF_PI 1.5707963267948966192313216916398
#define TWO_PI 6.283185307179586476925286766559
#define DEG_TO_RAD 0.017453292519943295769236907684886
#define RAD_TO_DEG 57.295779513082320876798154814105
#define EULER 2.718281828459045235360287471352

#define SERIAL  0x0
#define DISPLAY 0x1

enum BitOrder {
        LSBFIRST = 0,
        MSBFIRST = 1
};

#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif // min

#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))
#endif // max

//#define abs(x) ((x)>0?(x):-(x))
#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
#define round(x)     ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
#define radians(deg) ((deg)*DEG_TO_RAD)
#define degrees(rad) ((rad)*RAD_TO_DEG)
#define sq(x) ((x)*(x))

#define interrupts() __enable_irq()
#define noInterrupts() __disable_irq()

#define lowByte(w) ((uint8_t) ((w) & 0xff))
#define highByte(w) ((uint8_t) ((w) >> 8))

#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
#define bitSet(value, bit) ((value) |= (1UL << (bit)))
#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
#define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit))

typedef unsigned int word;

#define bit(b) (1UL << (b))

// TODO: to be checked
typedef uint8_t boolean ;
typedef uint8_t byte ;

#ifdef __cplusplus
} // extern "C"
#endif // __cplusplus

#endif /* _WIRING_CONSTANTS_ */