drv_tone_alarm.h File Reference

Driver for the PX4 audio alarm port, /dev/tone_alarm. More...

#include <lib/tunes/tune_definition.h>
#include <uORB/topics/tune_control.h>

Go to the source code of this file.

Macros
#define	CBRK_BUZZER_KEY   782097
#define	CBRK_OFF   0
#define	CBRK_ON   1
#define	CBRK_UNINIT   2
#define	_TONE_ALARM_BASE   0x7400
#define	TONE_SET_ALARM   _PX4_IOC(_TONE_ALARM_BASE, 1)
#define	TONE_ALARM0_DEVICE_PATH   "/dev/tone_alarm0"

Enumerations
enum	{   TONE_STOP_TUNE = 0, TONE_STARTUP_TUNE, TONE_ERROR_TUNE, TONE_NOTIFY_POSITIVE_TUNE,   TONE_NOTIFY_NEUTRAL_TUNE, TONE_NOTIFY_NEGATIVE_TUNE, TONE_ARMING_WARNING_TUNE, TONE_BATTERY_WARNING_SLOW_TUNE,   TONE_BATTERY_WARNING_FAST_TUNE, TONE_GPS_WARNING_TUNE, TONE_ARMING_FAILURE_TUNE, TONE_PARACHUTE_RELEASE_TUNE,   TONE_EKF_WARNING_TUNE, TONE_BARO_WARNING_TUNE, TONE_SINGLE_BEEP_TUNE, TONE_HOME_SET,   TONE_NUMBER_OF_TUNES }

Detailed Description

Driver for the PX4 audio alarm port, /dev/tone_alarm.

The tone_alarm driver supports a set of predefined "alarm" patterns and one user-supplied pattern. Patterns are ordered by priority, with a higher-priority pattern interrupting any lower-priority pattern that might be playing.

The TONE_SET_ALARM ioctl can be used to select a predefined alarm pattern, from 1 - <TBD>. Selecting pattern zero silences the alarm.

To supply a custom pattern, write an array of 1 - <TBD> tone_note structures to /dev/tone_alarm. The custom pattern has a priority of zero.

Patterns will normally play once and then silence (if a pattern was overridden it will not resume). A pattern may be made to repeat by inserting a note with the duration set to DURATION_REPEAT. This pattern will loop until either a higher-priority pattern is started or pattern zero is requested via the ioctl.