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fix: parse CRSF battery as big-endian per protocol spec

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CRSF battery frame is big-endian: voltage(u16 BE 0.1V),
current(u16 BE 0.1A), capacity(u24 BE mAh), remaining(u8 %).

Previous code read little-endian with wrong byte count (7 vs 8)
and wrong scaling (/1000 vs /10), producing 9.98V for a 1S battery.
This commit is contained in:
portersky
2026-06-14 23:34:12 +02:00
parent ef5012b9d4
commit d67d9b29d2
4 changed files with 39 additions and 23 deletions
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tools/telemetry.c
+3 -3
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@@ -174,8 +174,8 @@ static void dashboard_update(dashboard_t* d, cel_telemetry const* telem,
break;
case CEL_TELEM_BATTERY:
d->has_batt = 1;
d->batt_v = telem->data.battery.voltage_mv / 1000.0f;
d->batt_a = telem->data.battery.current_ma / 1000.0f;
d->batt_v = telem->data.battery.voltage_x10 / 10.0f;
d->batt_a = telem->data.battery.current_x10 / 10.0f;
d->batt_mah = telem->data.battery.capacity_mah;
d->batt_pct = telem->data.battery.remaining_pct;
d->batt_t = now;
@@ -286,7 +286,7 @@ static void render_dashboard(dashboard_t const* d,
if (d->batt_v > 3.0f) ansi_green(); else ansi_red();
printf("%.2fV ", d->batt_v);
ansi_reset();
printf("%.1fA %dmah %d%%", d->batt_a, d->batt_mah, d->batt_pct);
printf("%.1fA %umah %d%%", d->batt_a, d->batt_mah, d->batt_pct);
print_age(now, d->batt_t);
} else {
ansi_dim(); printf("waiting..."); ansi_reset();