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| author |  Berthold Stoeger <bstoeger@mail.tuwien.ac.at> | 2021-07-20 12:28:34 +0200 |
|---|---|---|
| committer |  Dirk Hohndel <dirk@hohndel.org> | 2021-07-23 11:16:00 -0700 |
| commit | 0c84f369c35bf416071b9ef6d5a401b457fd4a38 (patch) | |
| tree | d5e3fd55c7c5113537d14a17ee2406ecbf4b1e19 /core/sample.h | |
| parent | 8ac0519a9954b58f43bc42dd70c5643169543999 (diff) | |
| download | subsurface-0c84f369c35bf416071b9ef6d5a401b457fd4a38.tar.gz | |
core: use int16_t for sensor-id
The sensor-id in the sample struct was a uint8_t, with all
the known problems of unsigned integers. In the rest of the
code cylinder ids are signed integers. To avoid confusion,
make it a signed int. int8_t should be enough (max. 127
cylinders). To allow for degenerate cases, use an int16_t.
16k cylinders should be enough for everyone.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Diffstat (limited to 'core/sample.h')
| -rw-r--r-- | core/sample.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/core/sample.h b/core/sample.h index 1732b4d02..55195288d 100644 --- a/core/sample.h +++ b/core/sample.h @@ -9,7 +9,7 @@ extern "C" { #endif #define MAX_SENSORS 2 -#define NO_SENSOR ((uint8_t)-1) +#define NO_SENSOR -1 struct sample // BASE TYPE BYTES UNITS RANGE DESCRIPTION { // --------- ----- ----- ----- ----------- @@ -21,18 +21,18 @@ struct sample // BASE TYPE BYTES UNITS RANGE depth_t depth; // int32_t 4 mm (0-2000 km) dive depth of this sample depth_t stopdepth; // int32_t 4 mm (0-2000 km) depth of next deco stop temperature_t temperature; // uint32_t 4 mK (0-4 MK) ambient temperature - pressure_t pressure[MAX_SENSORS]; // int32_t 4 mbar (0-2 Mbar) cylinder pressures (main and CCR o2) + pressure_t pressure[MAX_SENSORS]; // int32_t 2x4 mbar (0-2 Mbar) cylinder pressures (main and CCR o2) o2pressure_t setpoint; // uint16_t 2 mbar (0-65 bar) O2 partial pressure (will be setpoint) - o2pressure_t o2sensor[3]; // uint16_t 6 mbar (0-65 bar) Up to 3 PO2 sensor values (rebreather) + o2pressure_t o2sensor[3]; // uint16_t 3x2 mbar (0-65 bar) Up to 3 PO2 sensor values (rebreather) bearing_t bearing; // int16_t 2 degrees (-1 no val, 0-360 deg) compass bearing - uint8_t sensor[MAX_SENSORS]; // uint8_t 1 sensorID (0-254) ID of cylinder pressure sensor - uint16_t cns; // uint16_t 1 % (0-64k %) cns% accumulated + int16_t sensor[MAX_SENSORS]; // int16_t 2x2 sensorID (0-16k) ID of cylinder pressure sensor + uint16_t cns; // uint16_t 2 % (0-64k %) cns% accumulated uint8_t heartbeat; // uint8_t 1 beats/m (0-255) heart rate measurement volume_t sac; // 4 ml/min predefined SAC bool in_deco; // bool 1 y/n y/n this sample is part of deco bool manually_entered; // bool 1 y/n y/n this sample was entered by the user, // not calculated when planning a dive -}; // Total size of structure: 57 bytes, excluding padding at end +}; // Total size of structure: 63 bytes, excluding padding at end extern void add_sample_pressure(struct sample *sample, int sensor, int mbar); |