1 files changed, 39 insertions, 0 deletions
diff --git a/thirdparty/raspberrypi/includes/softTone.h b/thirdparty/raspberrypi/includes/softTone.h
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+++ b/thirdparty/raspberrypi/includes/softTone.h
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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