cyw43

Rust driver for the CYW43439 wifi+bluetooth chip. Implementation based on Infineon/wifi-host-driver.

Works on the following boards:

• Raspberry Pi Pico W (RP2040)
• Raspberry Pi Pico 2 W (RP2350A)
• Pimoroni Pico Plus 2 W (RP2350B)
• Any board with Raspberry Pi RM2 radio module.
• Any board with the CYW43439 chip, and possibly others if the protocol is similar enough.

Features

Working:

• WiFi support
  • Station mode (joining an AP).
  • AP mode (creating an AP)
  • Scanning
  • Sending and receiving Ethernet frames.
  • Using the default MAC address.
  • embassy-net integration.
  • RP2040 PIO driver for the nonstandard half-duplex SPI used in the Pico W.
  • Using IRQ for device events, no busy polling.
  • GPIO support (for LED on the Pico W).
• Bluetooth support
  • Bluetooth Classic + LE HCI commands.
  • Concurrent operation with WiFi.
  • Implements the bt-hci controller traits.
  • Works with the TrouBLE bluetooth LE stack. Check its repo for examples using cyw43.

Running the WiFi examples

• Install probe-rs following the instructions at https://probe.rs.
• cd examples/rp

Example 1: Scan the wifi stations

• cargo run --release --bin wifi_scan

Example 2: Create an access point (IP and credentials in the code)

• cargo run --release --bin wifi_ap_tcp_server

Example 3: Connect to an existing network and create a server

• cargo run --release --bin wifi_tcp_server

After a few seconds, you should see that DHCP picks up an IP address like this

11.944489 DEBUG Acquired IP configuration:
11.944517 DEBUG    IP address:      192.168.0.250/24
11.944620 DEBUG    Default gateway: 192.168.0.33
11.944722 DEBUG    DNS server 0:    192.168.0.33

This example implements a TCP echo server on port 1234. You can try connecting to it with:

nc 192.168.0.250 1234

Send it some data, you should see it echoed back and printed in the firmware's logs.