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feat(companion): double the GPS trail buffer (512 -> 1024 points)

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RAM headroom allows it: +8KB resident (TrailStore::_buf), pushing static RAM
to 73.0%/75.0% on GAT562/WioTrackerL1Eink respectively. On-disk snapshot
format is unaffected (count is a uint16_t, already asserted to fit far past
this); an old 512-point snapshot still loads fine on this firmware.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
MarekZegare4
2026-06-24 16:18:45 +02:00
parent b7e7e945d2
commit 4f175bda3c
1 changed files with 2 additions and 2 deletions
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4
examples/companion_radio/Trail.h
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@@ -8,7 +8,7 @@
#include "GeoUtils.h"
// RAM-only GPS trail ring buffer.
// Storage cost: CAPACITY(512) × sizeof(TrailPoint)(16 B, padded) = 8 KB,
// Storage cost: CAPACITY(1024) × sizeof(TrailPoint)(16 B, padded) = 16 KB,
// always resident (UITask::_trail member). The trail survives auto-off (only
// the display blanks) but is lost on reboot — user explicitly snapshots to a
// LittleFS slot before powering down to keep it.
@@ -24,7 +24,7 @@ static const uint8_t TRAIL_FLAG_SEG_START = 0x01;
class TrailStore {
public:
static const int CAPACITY = 512;
static const int CAPACITY = 1024;
// _count is serialised as uint16_t in the save header — fail the build loudly
// if CAPACITY is ever grown past what that can hold, rather than truncating.
static_assert(CAPACITY <= 0xFFFF, "TrailStore::CAPACITY must fit in the uint16_t save-header count");