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Diffstat (limited to 'sensors/barometer.vala')
-rw-r--r-- | sensors/barometer.vala | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sensors/barometer.vala b/sensors/barometer.vala new file mode 100644 index 0000000..5c1f4f9 --- /dev/null +++ b/sensors/barometer.vala @@ -0,0 +1,23 @@ +/* Copyright 2012, Sebastian Reichel <sre@ring0.de> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +public interface Barometer : Device { + public abstract int32 get_pressure() throws Error; + + public double get_altitude(int32 base_pressure) throws Error { + int32 p = get_pressure(); + return (44330.0 * (1.0 - Posix.pow(p / base_pressure, 1.0 / 5.255))); + } +} |