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/*
* Copyright © 2012 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#ifndef _AO_MICROPEAK_H_
#define _AO_MICROPEAK_H_
#define FILTER_SHIFT 3
#define SAMPLE_SLEEP AO_MS_TO_TICKS(96)
/* 16 sample, or about two seconds worth */
#define GROUND_AVG_SHIFT 4
#define GROUND_AVG (1 << GROUND_AVG_SHIFT)
/* Pressure change (in Pa) to detect boost */
#define BOOST_DETECT 120 /* 10m at sea level, 12m at 2000m */
/* Wait after power on before doing anything to give the user time to assemble the rocket */
#define BOOST_DELAY AO_SEC_TO_TICKS(30)
/* Pressure change (in Pa) to detect landing */
#define LAND_DETECT 12 /* 1m at sea level, 1.2m at 2000m */
/* Current sensor pressure value */
extern uint32_t pa;
/* IIR filtered pressure value */
extern uint32_t pa_avg;
/* Average pressure value on ground */
extern uint32_t pa_ground;
/* Minimum recorded filtered pressure value */
extern uint32_t pa_min;
/* Pressure values converted to altitudes */
extern alt_t ground_alt, max_alt;
/* max_alt - ground_alt */
extern alt_t ao_max_height;
#endif
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