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/*
* softTone.c:
* For that authentic retro sound...
* Er... A little experiment to produce tones out of a Pi using
* one (or 2) GPIO pins and a piezeo "speaker" element.
* (Or a high impedance speaker, but don'y blame me if you blow-up
* the GPIO pins!)
* 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 Lesser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with wiringPi.
* If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#ifdef __cplusplus
extern "C" {
#endif
extern int softToneCreate (int pin) ;
extern void softToneStop (int pin) ;
extern void softToneWrite (int pin, int freq) ;
#ifdef __cplusplus
}
#endif
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