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Fix the gas change events for the Heinrichs Weikamp Frog.

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The Frog stores the index of the initial gas mix at the same location
as the OSTC, but the gas mix percentages are at a different offset, and
the number of gas mixes is different too. Parsing all the gas mixes in
advance makes the code easier to read and more future proof.
This commit is contained in:
Jef Driesen 2013-05-03 23:56:12 +02:00
parent c1893e9b0c
commit 86bdf0fbb4
1 changed files with 32 additions and 7 deletions
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39
src/hw_ostc_parser.c
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@ -31,6 +31,7 @@
#define ISINSTANCE(parser) dc_parser_isinstance((parser), &hw_ostc_parser_vtable)
#define NINFO 6
#define MAXGASMIX 5
typedef struct hw_ostc_parser_t hw_ostc_parser_t;
@ -53,6 +54,11 @@ typedef struct hw_ostc_layout_t {
unsigned int duration;
} hw_ostc_layout_t;
typedef struct hw_ostc_gasmix_t {
unsigned int oxygen;
unsigned int helium;
} hw_ostc_gasmix_t;
static dc_status_t hw_ostc_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
static dc_status_t hw_ostc_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
static dc_status_t hw_ostc_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value);
@ -321,6 +327,29 @@ hw_ostc_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t call
salinity = 100;
double hydrostatic = GRAVITY * salinity * 10.0;
// Get all the gas mixes.
unsigned int ngasmix = 0;
hw_ostc_gasmix_t gasmix[MAXGASMIX] = {{0}};
if (version == 0x22) {
ngasmix = 3;
for (unsigned int i = 0; i < ngasmix; ++i) {
gasmix[i].oxygen = data[25 + 2 * i];
gasmix[i].helium = 0;
}
} else {
ngasmix = 5;
for (unsigned int i = 0; i < ngasmix; ++i) {
gasmix[i].oxygen = data[19 + 2 * i + 0];
gasmix[i].helium = data[19 + 2 * i + 1];
}
}
// Get the index of the inital mix.
unsigned int initial = data[31];
if (initial < 1 || initial > ngasmix)
return DC_STATUS_DATAFORMAT;
initial--; /* Convert to a zero based index. */
// Get the extended sample configuration.
hw_ostc_sample_info_t info[NINFO];
for (unsigned int i = 0; i < NINFO; ++i) {
@ -359,14 +388,10 @@ hw_ostc_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t call
// Initial gas mix.
if (time == samplerate) {
unsigned int idx = data[31];
if (idx < 1 || idx > 5)
return DC_STATUS_DATAFORMAT;
idx--; /* Convert to a zero based index. */
sample.event.type = SAMPLE_EVENT_GASCHANGE2;
sample.event.time = 0;
sample.event.flags = 0;
sample.event.value = data[19 + 2 * idx] | (data[20 + 2 * idx] << 16);
sample.event.value = gasmix[initial].oxygen | (gasmix[initial].helium << 16);
if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
}
@ -439,13 +464,13 @@ hw_ostc_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t call
if (offset + 1 > size)
return DC_STATUS_DATAFORMAT;
unsigned int idx = data[offset];
if (idx < 1 || idx > 5)
if (idx < 1 || idx > ngasmix)
return DC_STATUS_DATAFORMAT;
idx--; /* Convert to a zero based index. */
sample.event.type = SAMPLE_EVENT_GASCHANGE2;
sample.event.time = 0;
sample.event.flags = 0;
sample.event.value = data[19 + 2 * idx] | (data[20 + 2 * idx] << 16);
sample.event.value = gasmix[idx].oxygen | (gasmix[idx].helium << 16);
if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
offset++;
}