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Shearwater: extract tank sensor data for log version 7

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The first dive computer to support this is the Perdix AI. Interestingly,
this keeps track of two sensors at all times. I haven't seen data with
two sensors active, yet.

[Jef Driesen: Update to the latest documentation.]

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2017-07-07 07:05:53 -07:00 committed by Jef Driesen
parent 9f754dc563
commit 7f22f4ac86
1 changed files with 28 additions and 0 deletions
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28
src/shearwater_predator_parser.c
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@ -522,6 +522,34 @@ shearwater_predator_parser_samples_foreach (dc_parser_t *abstract, dc_sample_cal
sample.deco.time = data[offset + 9] * 60;
if (callback) callback (DC_SAMPLE_DECO, sample, userdata);
// for logversion 7 and newer (introduced for Perdix AI)
// detect tank pressure
if (parser->logversion >= 7) {
// Tank pressure
// Values above 0xFFF0 are special codes:
// 0xFFFF AI is off
// 0xFFFE No comms for 90 seconds+
// 0xFFFD No comms for 30 seconds
// 0xFFFC Transmitter not paired
// For regular values, the top 4 bits contain the battery
// level (0=normal, 1=critical, 2=warning), and the lower 12
// bits the tank pressure in units of 2 psi.
unsigned int pressure = array_uint16_be (data + offset + 27);
if (pressure < 0xFFF0) {
pressure &= 0x0FFF;
sample.pressure.tank = 0;
sample.pressure.value = pressure * 2 * PSI / BAR;
if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
}
pressure = array_uint16_be (data + offset + 19);
if (pressure < 0xFFF0) {
pressure &= 0x0FFF;
sample.pressure.tank = 1;
sample.pressure.value = pressure * 2 * PSI / BAR;
if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
}
}
offset += parser->samplesize;
}