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fix(l2): WiFi fails to start or join - big statics and task stacks to PSRAM

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WiFi starts and joins on internal RAM: ~42 KB the first time, ~25 KB after,
more for WPA. Free internal RAM had shrunk to ~20 KB after opening the map
(the tile decoder's 12 KB stack, the 32 KB I-cache, the DMA draw buffers,
UI statics), so a scan failed at once (esp_wifi_init: no memory) and a join
during a tile download timed out (AUTH_EXPIRE).

- ESP-IDF: CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY, and the esp_timer
  task stack 8 -> 4 KB (it uses ~0.4 KB). Rebuild the framework libs:
  pio run -e Wio_Tracker_L2_idf_libs.
- PSRAM_BSS (EXT_RAM_BSS_ATTR) on the UI's big statics: QR codes, map
  state, charts, lists. .dram0.bss 115 -> 66 KB.
- The tile decoder's and fetcher's task stacks in PSRAM.

Free internal RAM, idle: 48 -> 105 KB; WiFi up: 57 KB, 29 KB at the
lowest while downloading tiles.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-10-14 17:23:29 +02:00
co-authored by Claude Opus 5.5
parent 3825dcc077
commit 2f2db6045c
17 changed files with 49 additions and 29 deletions
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solo/wio-tracker-l2/idf/sdkconfig
+7
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@@ -25,3 +25,10 @@ CONFIG_ESP_WIFI_DYNAMIC_TX_BUFFER=y
CONFIG_ESP_WIFI_DYNAMIC_TX_BUFFER_NUM=32
CONFIG_ESP_WIFI_RX_BA_WIN=6
CONFIG_LWIP_TCP_OOSEQ_MAX_PBUFS=4
# Internal RAM is what WiFi starts and joins on (~25 KB, more for WPA): big
# zero-initialised statics marked EXT_RAM_BSS_ATTR (QR codes, map state,
# charts...) go to PSRAM instead.
CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY=y
# Its callbacks are short (~0.4 KB of stack used): half the framework's 8 KB.
CONFIG_ESP_TIMER_TASK_STACK_SIZE=4096