RAK4631 board:
- SX126X_POWER_EN on P1.05 driven HIGH at init (radio is power-gated;
without this the chip has no power and SPI hangs)
- HFXO + LFXO external crystals in embassy_nrf::Config (USB CDC-ACM
needs +/- 500 ppm which the internal RC oscillator can't provide)
- SoftwareVbusDetect(true, true) so USB enumerates without needing a
CLOCK_POWER interrupt handler
- Green LED on P1.03 via SimpleLed (RAK19007 Base LED1, active HIGH)
- driver/mod.rs: open simple_led feature gate for rak_wisblock_4631
- Spim::new pin-order comment on SPI setup (arg order is sck/miso/mosi,
not sck/mosi/miso — easy to get wrong)
debug-checkpoint instrumentation (feature-gated, zero cost in release):
- radio.rs: debug_blink::set(N) at each TX-phase boundary, filling in
the long-aspirational blink-map doc
- debug_blink.rs: checkpoint 19 between prepare_for_cad and cad(), so
future bring-ups can distinguish modem-setup hang from DIO1-wait hang
justfile + mise.toml:
- set shell := ["mise", "exec", "--", "sh", "-c"] so recipes
always resolve tools through mise, not whatever happens to be on PATH
- replace per-board := vars + long if/elif _info chain with a single
case statement — one place per board, two lists (names + metadata)
- new flash-dfu recipe using adafruit-nrfutil via uvx, with VID:PID
(239a:0029) port autodetect for the Adafruit nRF52 bootloader
- mise.toml: rust pins now carry ARM targets + clippy, so 'mise install'
is sufficient bootstrapping (no extra rustup target add steps)
Verified TX on real hardware (RAK19007 Base + RAK4631 Core + RAK1921
OLED, US915 band): ADVERT round-trip with an external receiver.
swaits
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