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desklock/firmware/sdkconfig.defaults
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jpmschweitzerandClaude Fable 5 ac9d24e0f9
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SDIO tuning for sustained audio-upload TX (the real wall)
Root cause of the "blue screen on tap": NOT a firmware bug. The touch
fix worked (reached "listening"), and the mic audio then streamed
upstream — which instantly triggered the upstream SDIO wedge (#167):

  sdio_write_task: Failed to send data: 258 (timeout) -> host restart

i.e. the same wedge we fought overnight, but now provoked reliably by
the sustained ~32KB/s mic upload instead of waiting minutes. The wedge
is a host->slave SDIO write timeout: the slave RX buffers fill because
its Wi-Fi TX cannot drain fast enough.

Attempt: restore the slave Wi-Fi TX path shrunk during the RAM hunt and
enlarge the SDIO queues so the burst is absorbed and drained:
- WIFI_RMT_DYNAMIC_TX_BUFFER_NUM 24->64, STATIC_RX 8->16, RX 24->32
- WIFI_RMT_TX_BA_WIN 16->32
- ESP_HOSTED_SDIO_TX_Q_SIZE / RX_Q_SIZE = 32
- SDIO clock 10->20 MHz for drain headroom (still 1-bit)
Boot verified: no RAM famine, connects clean. Whether it survives the
audio burst is the open question upstream has not solved.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-15 09:18:03 +02:00

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# Target: Waveshare ESP32-P4-WIFI6-Touch-LCD-3.4C
CONFIG_IDF_TARGET="esp32p4"
# 32 MB NOR flash
CONFIG_ESPTOOLPY_FLASHSIZE_32MB=y
CONFIG_PARTITION_TABLE_CUSTOM=y
CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
# PSRAM at 200 MHz — REQUIRED for the 800x800 MIPI-DSI framebuffer.
# 200 MHz is gated behind IDF_EXPERIMENTAL_FEATURES; without it the build
# silently falls back to 20 MHz and the DSI underruns (mirrors the official
# 08_lvgl_demo_v9 example config).
CONFIG_SPIRAM=y
CONFIG_IDF_EXPERIMENTAL_FEATURES=y
CONFIG_SPIRAM_SPEED_200M=y
CONFIG_SPIRAM_XIP_FROM_PSRAM=y
CONFIG_CACHE_L2_CACHE_256KB=y
CONFIG_CACHE_L2_CACHE_LINE_128B=y
CONFIG_COMPILER_OPTIMIZATION_PERF=y
CONFIG_FREERTOS_HZ=1000
# LVGL font for the bring-up placeholder face
CONFIG_LV_FONT_MONTSERRAT_48=y
# LVGL font for status/elapsed/clock chrome
CONFIG_LV_FONT_MONTSERRAT_28=y
# ESP-Hosted C6 radio
CONFIG_ESP_WIFI_SOFTAP_SUPPORT=y
# custom fonts are uncompressed, but enable the decoder as belt-and-braces
CONFIG_LV_USE_FONT_COMPRESSED=y
# ESP-Hosted board variant + wifi-remote data-path tuning (from factory brookesia config;
# without these the RPC control path works but data frames never flow)
CONFIG_SLAVE_IDF_TARGET_ESP32C6=y
CONFIG_ESP_HOSTED_CP_TARGET_ESP32C6=y
CONFIG_ESP_HOSTED_P4_DEV_BOARD_FUNC_BOARD=y
CONFIG_WIFI_RMT_STATIC_RX_BUFFER_NUM=16
CONFIG_WIFI_RMT_DYNAMIC_RX_BUFFER_NUM=32
CONFIG_WIFI_RMT_DYNAMIC_TX_BUFFER_NUM=64
CONFIG_WIFI_RMT_AMPDU_TX_ENABLED=y
CONFIG_WIFI_RMT_TX_BA_WIN=32
CONFIG_WIFI_RMT_AMPDU_RX_ENABLED=y
CONFIG_WIFI_RMT_RX_BA_WIN=16
# hosted task stacks MUST stay in internal RAM (PSRAM stacks assert on P4)
CONFIG_ESP_HOSTED_DFLT_TASK_FROM_SPIRAM=n
# hosted 2.x: keep internal RAM for task stacks; buffers go to PSRAM
CONFIG_ESP_HOSTED_MEMPOOL_PREFER_SPIRAM=y
# conservative SDIO clock for first data-path proof (raise after verification)
CONFIG_ESP_HOSTED_SDIO_CLOCK_FREQ_KHZ=20000
# headroom for diag event handlers that touch LVGL
CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
# 1-bit SDIO: fixes the "Unrecoverable host sdio state" wedge family
# (esp-hosted-mcu #167/#148); 2.5MB/s is ~80x what voice needs
CONFIG_ESP_HOSTED_SDIO_1_BIT_BUS=y
# absorb the mic-audio upstream burst without stalling the SDIO write
CONFIG_ESP_HOSTED_SDIO_TX_Q_SIZE=32
CONFIG_ESP_HOSTED_SDIO_RX_Q_SIZE=32