63 lines
4.1 KiB
Markdown
63 lines
4.1 KiB
Markdown
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# Sources — fetched 2026-04-28
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All findings in this folder trace back to the URLs below. URLs are
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date-stamped because closed-source comments and forum threads do
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disappear; if you need to verify a quote, prefer the canonical
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documentation/source over the forum reproduction.
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## Primary sources (datasheets, spec)
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- [CYW43439 Datasheet v05.00 — Infineon](https://storage.googleapis.com/media.amperka.com/products/raspberry-pi-pico-w/media/infineon-cyw43439-datasheet.pdf)
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Official register map and gSPI protocol.
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- [CYW43439 Datasheet v03.00 — Mouser mirror](https://www.mouser.com/datasheet/2/196/Infineon_CYW43439_DataSheet_v03_00_EN-3074791.pdf)
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## Driver source — the "what does the host write" reference
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- [pico-sdk · `pico_cyw43_driver/cyw43_bus_pio_spi.c`](https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/pico_cyw43_driver/cyw43_bus_pio_spi.c)
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- [pico-sdk · `pico_cyw43_driver/cyw43_bus_pio_spi.pio`](https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/pico_cyw43_driver/cyw43_bus_pio_spi.pio)
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- [georgerobotics/cyw43-driver · `src/cyw43_ll.c`](https://github.com/georgerobotics/cyw43-driver/blob/main/src/cyw43_ll.c) — bus-init, IOCTL set
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- [georgerobotics/cyw43-driver · `src/cyw43_ctrl.c`](https://github.com/georgerobotics/cyw43-driver/blob/main/src/cyw43_ctrl.c) — control plane
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- [georgerobotics/cyw43-driver · firmware/](https://github.com/georgerobotics/cyw43-driver/tree/main/firmware) — the blob (do not redistribute)
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- [georgerobotics/cyw43-driver · README](https://github.com/georgerobotics/cyw43-driver/blob/main/README.md) — license terms
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## Alternate driver implementations (cross-checks)
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- [embassy-rs/cyw43 (archived; merged into embassy)](https://github.com/embassy-rs/cyw43)
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- [soypat/cyw43439 (TinyGo)](https://github.com/soypat/cyw43439)
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- [soypat/cyw43439 — WHD package docs](https://pkg.go.dev/github.com/soypat/cyw43439/whd)
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- [PicoWi part 1 — Iosoft blog (gSPI walk-through)](https://iosoft.blog/2022/12/06/picowi_part1/)
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- [PicoWi project page](https://iosoft.blog/2022/12/06/picowi/)
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## Emulator side
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- [wokwi/rp2040js — main repo](https://github.com/wokwi/rp2040js)
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- [wokwi/rp2040js — issue #134 "Is there a way to emulate cyw43 using nodejs?"](https://github.com/wokwi/rp2040js/issues/134) — open, no maintainer reply
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- [wokwi/rp2040js — releases](https://github.com/wokwi/rp2040js/releases)
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- [c1570/rp2040js fork (RP2350 support)](https://github.com/c1570/rp2040js)
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- [wokwi/wokwigw — Wokwi IoT network gateway](https://github.com/wokwi/wokwigw) — what we'd mirror for Tier 2 transport
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## Forum / discussion (lower confidence, useful for context)
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- [Custom code on the Pico W CYW43439 — RPi forums](https://forums.raspberrypi.com/viewtopic.php?t=336860)
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- [Register-level documentation for CYW43439 — RPi forums](https://forums.raspberrypi.com/viewtopic.php?t=336824)
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- [pico-sdk issue #2044 — CYW43 PIO ASM hardcoded for ARM](https://github.com/raspberrypi/pico-sdk/issues/2044)
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- [pico-sdk issue #1351 — Pico W SPI state machine](https://github.com/raspberrypi/pico-sdk/issues/1351)
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- [micropython issue #11247 — cyw43_spi_init bus_data assert](https://github.com/micropython/micropython/issues/11247)
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- [micropython PR #16915 — lost CYW43 events on dual-core](https://github.com/micropython/micropython/pull/16915)
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## Wokwi (closed source, observed behaviour only)
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- [Wokwi ESP32 WiFi guide](https://docs.wokwi.com/guides/esp32-wifi) — the model we'd mirror
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- [Pi Pico W on Wokwi (project listing)](https://wokwi.com/pi-pico)
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- [Pico W WiFi WORKING — sample project](https://wokwi.com/projects/383488063347027969)
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- [Pico W WiFi-NTP — sample project](https://wokwi.com/projects/360632327984826369)
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## Velxio internal (this repo)
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- `wokwi-libs/rp2040js/src/peripherals/pio.ts` — `RPPIO`, `StateMachine`
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- `wokwi-libs/rp2040js/src/gpio-pin.ts`
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- `frontend/src/simulation/RP2040Simulator.ts` — current wrapper
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- `frontend/src/simulation/MicroPythonLoader.ts` — current MP firmware loader
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- `frontend/src/types/board.ts` — `pi-pico-w` board declaration
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- `backend/app/services/esp32_worker.py` — the slirp pattern we'd copy
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