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Add EON Steel gas change event parsing

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The really sad part is that the EON Steel handles gas change events
correctly, by actually saying which cylinder it switches to.  But the
libdivecomputer interfaces are broken, and only contain the gas *mix*
you switch to, which is ambiguous since you could have the same mix in
multiple cylinders.

Maybe we could put the one-based cylinder index into the "flags" field?
With zero meaning "unknown". That would be a straightforward extension.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2015-01-02 22:23:40 -08:00 committed by Jef Driesen
parent 87e6940572
commit 7a7418421c
1 changed files with 22 additions and 0 deletions
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22
src/suunto_eonsteel_parser.c
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@ -289,6 +289,25 @@ static void sample_cylinder_pressure(struct sample_data *info, unsigned char idx
if (info->callback) info->callback(DC_SAMPLE_PRESSURE, sample, info->userdata);
}
static void sample_gas_switch_event(struct sample_data *info, unsigned short idx)
{
suunto_eonsteel_parser_t *eon = info->eon;
dc_sample_value_t sample = {0};
int o2, he;
if (idx < 1 || idx > eon->cache.ngases)
return;
// Horrible, broken, gas change events
o2 = 100 * eon->cache.gasmix[idx-1].oxygen;
he = 100 * eon->cache.gasmix[idx-1].helium;
sample.event.type = SAMPLE_EVENT_GASCHANGE2;
sample.event.value = o2 | (he << 16);
if (info->callback) info->callback(DC_SAMPLE_EVENT, sample, info->userdata);
}
static int traverse_samples(unsigned short type, const struct type_desc *desc, const unsigned char *data, int len, void *user)
{
struct sample_data *info = (struct sample_data *) user;
@ -309,6 +328,9 @@ static int traverse_samples(unsigned short type, const struct type_desc *desc, c
case 0x000a: // cylinder idx in first byte, pressure in next word
sample_cylinder_pressure(info, data[0], array_uint16_le(data+1));
break;
case 0x001d:
sample_gas_switch_event(info, array_uint16_le(data));
break;
}
return 0;
}