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Joeandclaude-flow
00737441c4
Every C6 node spends coexistence time-slicing on 802.15.4 -- a single 2.4 GHz transceiver is shared between WiFi, BLE and 15.4 -- against a receive path that provably delivers nothing. That time competes directly with CSI capture, which is the node's entire purpose, and it matters most on a large fleet where the 50 Hz receive gate is already the binding constraint. The evidence that it cannot receive is upstream's own (ADR-110 D1, ruvnet/RuView#762): five configurations tested -- channel 15 and 26, OpenThread on and off, promiscuous on and off, PAN-matched and broadcast -- and every one gave rx=0 while TX stayed 100% reliable on IDF v5.4. ESP-NOW shipped as the workaround and is what this firmware actually syncs on. The stack was nonetheless still initialised at boot and beaconing every 100 ms. Safe to remove: the ADR-018 byte 19 bit 4 "sync valid" flag is ORed from both transports and the 15.4 branch is #ifdef-gated on this symbol, so the working ESP-NOW path keeps setting it. c6_timesync_init is gated on the same symbol and is no longer called. Co-Authored-By: claude-flow <ruv@ruv.net>
99 lines
4.1 KiB
Plaintext
99 lines
4.1 KiB
Plaintext
# ESP32-C6 CSI Node — Target overlay (ADR-110)
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#
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# Auto-applied by ESP-IDF when CONFIG_IDF_TARGET=esp32c6.
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# Layered on top of sdkconfig.defaults — only the differences live here.
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#
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# Build:
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# idf.py set-target esp32c6
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# idf.py build
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#
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# Hardware: stock ESP32-C6 dev board with 4 MB or 8 MB embedded flash.
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# Confirmed on COM6: ESP32-C6 (QFN40) rev v0.2, 8 MB flash, 320 KiB SRAM.
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# ── Target ──
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CONFIG_IDF_TARGET="esp32c6"
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# ── Flash & partitions (4 MB — common across C6 dev boards) ──
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CONFIG_PARTITION_TABLE_CUSTOM=y
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CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_4mb.csv"
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CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
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CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
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# ── CSI (required) ──
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CONFIG_ESP_WIFI_CSI_ENABLED=y
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# ── ADR-110 P2 & P3: Wi-Fi 6 / iTWT ──
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# IDF v5.4 exposes neither ESP_WIFI_11AX_SUPPORT nor ESP_WIFI_ITWT_SUPPORT as
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# user Kconfig — they're SoC capabilities (SOC_WIFI_HE_SUPPORT) auto-enabled
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# on chips that have HE support (C6/C5). WPA3 is opt-in:
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CONFIG_ESP_WIFI_ENABLE_WPA3_SAE=y
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# ── ADR-110 P4: 802.15.4 (raw, no OpenThread) ──
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# IEEE 802.15.4 PHY enabled for our raw beacon protocol in c6_timesync.c.
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# OpenThread is DISABLED — empirically (ch15 + ch26 tested with the same
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# negative result), enabling OpenThread MTD caused our weak-symbol overrides
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# of esp_ieee802154_receive_done/transmit_done to never fire, breaking
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# leader election. Raw 802.15.4 mode is what we actually need: a private
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# mesh protocol on a private channel, no Thread network attach.
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CONFIG_IEEE802154_ENABLED=y
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CONFIG_OPENTHREAD_ENABLED=n
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# ADR-110 P4: 802.15.4 channel override.
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# Default Kconfig value is 15 (2425 MHz). On the 2.4 GHz radio that's
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# directly under WiFi channel 5 (2432 MHz). Channel 26 = 2480 MHz is on
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# the WiFi guard band above channel 14, giving the 15.4 path room to RX
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# without competing with WiFi traffic for radio time.
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CONFIG_C6_TIMESYNC_CHANNEL=26
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# ── ADR-110 P5: LP-core (deep-sleep coprocessor) ──
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# Enable the LP RISC-V core so c6_lp_core.c can ship a wake-on-motion stub.
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CONFIG_ULP_COPROC_ENABLED=y
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CONFIG_ULP_COPROC_TYPE_LP_CORE=y
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CONFIG_ULP_COPROC_RESERVE_MEM=8192
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# ── No display, no WASM, no mmWave on the C6 research target ──
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# Display (ADR-045) needs 8 MB + native USB-OTG framebuffer hooks.
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# WASM3 (ADR-040) needs PSRAM for hot-loadable modules.
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# mmWave (Seeed MR60BHA2 on COM4) is a separate board.
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# CONFIG_DISPLAY_ENABLE is not set
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# CONFIG_WASM_ENABLE is not set
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# Physical Tier 2 qualification on ESP32-C6 rev 0.2 converges at 8 Hz while
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# leaving the raw network CSI stream independent at roughly 30-40 pps.
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CONFIG_EDGE_DSP_SAMPLE_HZ=8
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# ── Compiler ──
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CONFIG_COMPILER_OPTIMIZATION_SIZE=y
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# ── Logging ──
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CONFIG_BOOTLOADER_LOG_LEVEL_WARN=y
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CONFIG_LOG_DEFAULT_LEVEL_INFO=y
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# ── lwIP / FreeRTOS — same as S3 path ──
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CONFIG_LWIP_SO_RCVBUF=y
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CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
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CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=8192
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# ── Power: keep CPU at max 160 MHz (C6 ceiling) for DSP throughput ──
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CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_160=y
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CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ=160
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# ADR-110 D1 / ruvnet/RuView#762: the 802.15.4 RX path never delivers a
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# protocol frame on IDF v5.4. Upstream tested five configurations -- channel
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# 15 and 26, OpenThread on and off, promiscuous on and off, PAN-matched and
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# broadcast -- and every one gave rx=0 with TX at 100% reliability. ESP-NOW
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# shipped as the workaround and is what this firmware actually syncs on
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# (measured 99.56% cross-board delivery, 104 us smoothed offset).
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#
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# The C6 has a single 2.4 GHz transceiver shared by WiFi, BLE and 802.15.4,
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# so leaving the 15.4 stack running costs coexistence time-slicing against
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# the CSI capture that is the entire point of the node -- beaconing every
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# 100 ms and listening on a radio that provably returns nothing. Disable it
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# and give the airtime back to WiFi, which matters most at nine nodes where
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# the 50 Hz receive gate is already the binding constraint.
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#
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# Safe to turn off: the ADR-018 byte 19 bit 4 "sync valid" flag is ORed from
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# both transports and the 15.4 branch is #ifdef-gated on this symbol, so the
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# working ESP-NOW path keeps setting it.
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CONFIG_C6_TIMESYNC_ENABLE=n
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