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Adjust the depth for salt water dives.

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The Uwatec dive computers report the depth based on fresh water. Salt
water dives need a correction to take into account the salinity. There
is only a fresh/salt water flag present in the data, but Uwatec appears
to assume a salinity factor of 1.025.
This commit is contained in:
Jef Driesen 2015-05-16 22:47:43 +02:00
parent f59bad5260
commit 5ca1ef40c1
1 changed files with 28 additions and 2 deletions
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30
src/uwatec_smart_parser.c
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@ -51,6 +51,9 @@
#define NGASMIXES 3
#define FRESH 1.000
#define SALT 1.025
typedef enum {
PRESSURE_DEPTH,
RBT,
@ -74,6 +77,7 @@ typedef struct uwatec_smart_header_info_t {
unsigned int temp_maximum;
unsigned int temp_surface;
unsigned int tankpressure;
unsigned int salinity;
} uwatec_smart_header_info_t;
typedef struct uwatec_smart_sample_info_t {
@ -108,6 +112,7 @@ struct uwatec_smart_parser_t {
unsigned int oxygen[NGASMIXES];
unsigned int ntanks;
uwatec_smart_tank_t tank[NGASMIXES];
dc_water_t watertype;
};
static dc_status_t uwatec_smart_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
@ -134,6 +139,7 @@ uwatec_smart_header_info_t uwatec_smart_pro_header = {
UNSUPPORTED, /* temp_maximum */
UNSUPPORTED, /* temp_surface */
UNSUPPORTED, /* tankpressure */
UNSUPPORTED, /* salinity */
};
static const
@ -145,6 +151,7 @@ uwatec_smart_header_info_t uwatec_smart_galileo_header = {
28, /* temp_maximum */
32, /* temp_surface */
50, /* tankpressure */
94, /* salinity */
};
static const
@ -156,6 +163,7 @@ uwatec_smart_header_info_t uwatec_smart_aladin_tec_header = {
28, /* temp_maximum */
32, /* temp_surface */
UNSUPPORTED, /* tankpressure */
UNSUPPORTED, /* salinity */
};
static const
@ -167,6 +175,7 @@ uwatec_smart_header_info_t uwatec_smart_aladin_tec2g_header = {
28, /* temp_maximum */
32, /* temp_surface */
UNSUPPORTED, /* tankpressure */
UNSUPPORTED, /* salinity */
};
static const
@ -178,6 +187,7 @@ uwatec_smart_header_info_t uwatec_smart_com_header = {
UNSUPPORTED, /* temp_maximum */
UNSUPPORTED, /* temp_surface */
30, /* tankpressure */
UNSUPPORTED, /* salinity */
};
static const
@ -189,6 +199,7 @@ uwatec_smart_header_info_t uwatec_smart_tec_header = {
UNSUPPORTED, /* temp_maximum */
UNSUPPORTED, /* temp_surface */
34, /* tankpressure */
UNSUPPORTED, /* salinity */
};
static const
@ -335,6 +346,14 @@ uwatec_smart_parser_cache (uwatec_smart_parser_t *parser)
}
}
// Get the water type.
dc_water_t watertype = DC_WATER_FRESH;
if (header->salinity != UNSUPPORTED) {
if (data[header->salinity] & 0x10) {
watertype = DC_WATER_SALT;
}
}
// Cache the data for later use.
parser->trimix = trimix;
parser->ngasmixes = ngasmixes;
@ -345,6 +364,7 @@ uwatec_smart_parser_cache (uwatec_smart_parser_t *parser)
for (unsigned int i = 0; i < ntanks; ++i) {
parser->tank[i] = tank[i];
}
parser->watertype = watertype;
parser->cached = 1;
return DC_STATUS_SUCCESS;
@ -427,6 +447,7 @@ uwatec_smart_parser_create (dc_parser_t **out, dc_context_t *context, unsigned i
parser->tank[i].beginpressure = 0;
parser->tank[i].endpressure = 0;
}
parser->watertype = DC_WATER_FRESH;
*out = (dc_parser_t*) parser;
@ -459,6 +480,7 @@ uwatec_smart_parser_set_data (dc_parser_t *abstract, const unsigned char *data,
parser->tank[i].beginpressure = 0;
parser->tank[i].endpressure = 0;
}
parser->watertype = DC_WATER_FRESH;
return DC_STATUS_SUCCESS;
}
@ -496,6 +518,8 @@ uwatec_smart_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsi
if (rc != DC_STATUS_SUCCESS)
return rc;
double salinity = (parser->watertype == DC_WATER_SALT ? SALT : FRESH);
dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
dc_tank_t *tank = (dc_tank_t *) value;
@ -505,7 +529,7 @@ uwatec_smart_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsi
*((unsigned int *) value) = array_uint16_le (data + table->divetime) * 60;
break;
case DC_FIELD_MAXDEPTH:
*((double *) value) = array_uint16_le (data + table->maxdepth) / 100.0;
*((double *) value) = array_uint16_le (data + table->maxdepth) / 100.0 * salinity;
break;
case DC_FIELD_GASMIX_COUNT:
if (parser->trimix)
@ -671,6 +695,8 @@ uwatec_smart_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t
// Previous gas mix - initialize with impossible value
unsigned int gasmix_previous = 0xFFFFFFFF;
double salinity = (parser->watertype == DC_WATER_SALT ? SALT : FRESH);
int have_depth = 0, have_temperature = 0, have_pressure = 0, have_rbt = 0,
have_heartrate = 0, have_alarms = 0, have_bearing = 0;
@ -878,7 +904,7 @@ uwatec_smart_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t
}
if (have_depth) {
sample.depth = depth - depth_calibration;
sample.depth = (depth - depth_calibration) * salinity;
if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
}