forked from Archive/PX4-Autopilot
129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/****************************************************************************
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*
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* Copyright (C) 2012 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/*
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* Driver for the PX4 audio alarm port, /dev/tone_alarm.
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*
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* The tone_alarm driver supports a set of predefined "alarm"
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* patterns and one user-supplied pattern. Patterns are ordered by
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* priority, with a higher-priority pattern interrupting any
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* lower-priority pattern that might be playing.
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*
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* The TONE_SET_ALARM ioctl can be used to select a predefined
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* alarm pattern, from 1 - <TBD>. Selecting pattern zero silences
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* the alarm.
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*
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* To supply a custom pattern, write an array of 1 - <TBD> tone_note
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* structures to /dev/tone_alarm. The custom pattern has a priority
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* of zero.
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*
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* Patterns will normally play once and then silence (if a pattern
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* was overridden it will not resume). A pattern may be made to
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* repeat by inserting a note with the duration set to
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* DURATION_REPEAT. This pattern will loop until either a
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* higher-priority pattern is started or pattern zero is requested
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* via the ioctl.
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*/
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#ifndef DRV_TONE_ALARM_H_
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#define DRV_TONE_ALARM_H_
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#include <sys/ioctl.h>
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#define _TONE_ALARM_BASE 0x7400
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#define TONE_SET_ALARM _IOC(_TONE_ALARM_BASE, 1)
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/* structure describing one note in a tone pattern */
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struct tone_note {
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uint8_t pitch;
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uint8_t duration; /* duration in multiples of 10ms */
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#define DURATION_END 0 /* ends the pattern */
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#define DURATION_REPEAT 255 /* resets the note counter to zero */
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};
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enum tone_pitch {
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TONE_NOTE_E4, /* E4 */
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TONE_NOTE_F4, /* F4 */
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TONE_NOTE_F4S, /* F#4/Gb4 */
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TONE_NOTE_G4, /* G4 */
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TONE_NOTE_G4S, /* G#4/Ab4 */
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TONE_NOTE_A4, /* A4 */
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TONE_NOTE_A4S, /* A#4/Bb4 */
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TONE_NOTE_B4, /* B4 */
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TONE_NOTE_C5, /* C5 */
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TONE_NOTE_C5S, /* C#5/Db5 */
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TONE_NOTE_D5, /* D5 */
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TONE_NOTE_D5S, /* D#5/Eb5 */
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TONE_NOTE_E5, /* E5 */
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TONE_NOTE_F5, /* F5 */
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TONE_NOTE_F5S, /* F#5/Gb5 */
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TONE_NOTE_G5, /* G5 */
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TONE_NOTE_G5S, /* G#5/Ab5 */
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TONE_NOTE_A5, /* A5 */
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TONE_NOTE_A5S, /* A#5/Bb5 */
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TONE_NOTE_B5, /* B5 */
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TONE_NOTE_C6, /* C6 */
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TONE_NOTE_C6S, /* C#6/Db6 */
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TONE_NOTE_D6, /* D6 */
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TONE_NOTE_D6S, /* D#6/Eb6 */
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TONE_NOTE_E6, /* E6 */
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TONE_NOTE_F6, /* F6 */
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TONE_NOTE_F6S, /* F#6/Gb6 */
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TONE_NOTE_G6, /* G6 */
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TONE_NOTE_G6S, /* G#6/Ab6 */
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TONE_NOTE_A6, /* A6 */
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TONE_NOTE_A6S, /* A#6/Bb6 */
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TONE_NOTE_B6, /* B6 */
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TONE_NOTE_C7, /* C7 */
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TONE_NOTE_C7S, /* C#7/Db7 */
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TONE_NOTE_D7, /* D7 */
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TONE_NOTE_D7S, /* D#7/Eb7 */
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TONE_NOTE_E7, /* E7 */
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TONE_NOTE_F7, /* F7 */
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TONE_NOTE_F7S, /* F#7/Gb7 */
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TONE_NOTE_G7, /* G7 */
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TONE_NOTE_G7S, /* G#7/Ab7 */
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TONE_NOTE_A7, /* A7 */
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TONE_NOTE_A7S, /* A#7/Bb7 */
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TONE_NOTE_B7, /* B7 */
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TONE_NOTE_C8, /* C8 */
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TONE_NOTE_C8S, /* C#8/Db8 */
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TONE_NOTE_D8, /* D8 */
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TONE_NOTE_D8S, /* D#8/Eb8 */
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TONE_NOTE_SILENCE,
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TONE_NOTE_MAX
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};
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#endif /* DRV_TONE_ALARM_H_ */
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