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feat(ui): GPS breadcrumb phase 1 — storage, sampling, Summary view

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Adds Tools › Breadcrumb. Enter on the screen toggles tracking; while
active, UITask::loop samples GPS at the cadence chosen in settings
(default 1 min) and drops the point into a 256-entry RAM ring guarded
by a min-distance gate (default 25 m). A "G" indicator joins "A" in
the status bar with the same blink convention.

New storage:
- examples/companion_radio/Breadcrumb.h — BreadcrumbStore class
- 256 × 12 B = 3 KB RAM (survives auto-off, lost on reboot — explicit
  flash-slot save comes in phase 4)
- Haversine min-delta gate, total distance, elapsed seconds, current
  km/h, bounding-box helper

New screen:
- examples/companion_radio/ui-new/BreadcrumbScreen.h — Summary view
  with Status, Points, Dist (m or km), Time (h:mm), Speed; Enter
  toggles tracking, Esc returns to Tools

Schema bump 0xC0DE0002 → 0xC0DE0003 for two new NodePrefs bytes:
breadcrumb_interval_idx (1min default) and breadcrumb_min_delta_idx
(25m default). Older saves leave both at zero, which matches the new
defaults. DataStore::loadPrefsInt/savePrefs read/write the pair.

Logging on/off is a runtime flag inside BreadcrumbStore — not a
preference — so reboot returns to the off state cleanly; the user
will be able to persist a snapshot to a slot in phase 4.

Phase 2 (map view), 3 (point list), 4 (slot save/load, GPX export over
USB), and 5 (settings UI) follow incrementally.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-25 08:22:12 +02:00
co-authored by Claude Sonnet 4.6
parent ccf45f0c0c
commit adef2fceb9
8 changed files with 289 additions and 7 deletions
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examples/companion_radio/NodePrefs.h
+6 -1
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@@ -99,11 +99,16 @@ struct NodePrefs { // persisted to file
static const uint8_t FAVOURITE_PREFIX_LEN = 6;
uint8_t favourite_contacts[FAVOURITES_COUNT][FAVOURITE_PREFIX_LEN];
// GPS breadcrumb cadence — indices into BreadcrumbStore::intervalSecs / minDeltaMeters.
// Logging on/off is a runtime state (Tools › Breadcrumb), not a persisted preference.
uint8_t breadcrumb_interval_idx; // 0..3: 1min / 30s / 5min / 15min
uint8_t breadcrumb_min_delta_idx; // 0..2: 25m / 5m / 100m
// Tail sentinel written at the end of /new_prefs. Bump the low byte when
// adding/removing/reordering fields in DataStore::savePrefs/loadPrefsInt so
// older saves are detected on load and skipped (zero-init defaults kept).
// High 24 bits identify the file format; low byte is the schema revision.
static const uint32_t SCHEMA_SENTINEL = 0xC0DE0002;
static const uint32_t SCHEMA_SENTINEL = 0xC0DE0003;
// Bit-index for each home page. Used by page_order (entries store bit+1) and
// by home_pages_mask. Single source of truth — both HomeScreen::pageBit/bitToPage