WiringPi/wiringPi/wiringPi.h

/*
 * wiringPi:
 *	Arduino compatable (ish) Wiring library for the Raspberry Pi
 *	Copyright (c) 2012 Gordon Henderson
 ***********************************************************************
 * This file is part of wiringPi:
 *	https://projects.drogon.net/raspberry-pi/wiringpi/
 *
 *    wiringPi is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    wiringPi 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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
 ***********************************************************************
 */

// Handy defines

#define	NUM_PINS	17

#define	WPI_MODE_PINS		 0
#define	WPI_MODE_GPIO		 1
#define	WPI_MODE_GPIO_SYS	 2

#define	INPUT		 0
#define	OUTPUT		 1
#define	PWM_OUTPUT	 2

#define	LOW		 0
#define	HIGH		 1

#define	PUD_OFF		 0
#define	PUD_DOWN	 1
#define	PUD_UP		 2

// Function prototypes
//	c++ wrappers thanks to a commend by Nick Lott
//	(and others on the Raspberry Pi forums)

#ifdef __cplusplus
extern "C" {
#endif

extern int  wiringPiSetup     (void) ;
extern int  wiringPiSetupSys  (void) ;
extern int  wiringPiSetupGpio (void) ;

extern void wiringPiGpioMode  (int mode) ;

extern void pullUpDnControl   (int pin, int pud) ;
extern void pinMode           (int pin, int mode) ;
extern void digitalWrite      (int pin, int value) ;
extern void pwmWrite          (int pin, int value) ;
extern int  digitalRead       (int pin) ;

extern void         delay             (unsigned int howLong) ;
extern void         delayMicroseconds (unsigned int howLong) ;
extern unsigned int millis            (void) ;

#ifdef __cplusplus
}
#endif