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feat(l1): messages kept on flash across a power-off, and "Powered off" on e-ink

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Settings > Messages > Keep messages (Off, 500, 1000, 2500 in all; off by
default; HIST_FLASH, ui-core/HistoryLog.h). Two append-only logs on the QSPI
flash, channels and DMs, restored into the RAM rings at the start. A batch is
written a minute after the first unsaved change and at shutdown, as the L1's
power switch gives no warning. Each segment has a directory of its own: a
LittleFS 1.x commit erases one of a directory's two fixed blocks every time.

E-ink panels keep their last frame, so a shutdown now leaves "Powered off" on
it and puts the controller into deep sleep.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-10-30 09:46:43 +01:00
co-authored by Claude Opus 5.5
parent 751cbc1e79
commit bf7b262645
17 changed files with 407 additions and 13 deletions
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examples/companion_radio/ui-lvgl/HistoryStore.h
+1 -6
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@@ -46,12 +46,7 @@ struct Hdr {
uint32_t cap, head, count, next_id;
};
// FNV-1a over the channel's secret: renaming a channel keeps its archive.
static uint32_t chKey(const ChannelDetails& ch) {
uint32_t h = 2166136261u;
for (size_t i = 0; i < sizeof(ch.channel.secret); i++) { h ^= ch.channel.secret[i]; h *= 16777619u; }
return h;
}
static uint32_t chKey(const ChannelDetails& ch) { return channelKey(ch); }
// Earlier builds hashed the name in too (see migrateKeys()).
static uint32_t chKeyNamed(const ChannelDetails& ch) {
uint32_t h = 2166136261u;