Crate cyw43

cyw43

Rust driver for the CYW43439 wifi chip, used in the Raspberry Pi Pico W. Implementation based on Infineon/wifi-host-driver.

Current status

Working:

• 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
• GPIO support (for LED on the Pico W)

TODO:

• Setting a custom MAC address.
• Bus sleep (for power consumption optimization)

Running the examples

• cargo install probe-rs --features cli
• 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.

Structs

BssInfo

Wifi Scan Result

Control

Control driver.

ControlError

Control errors.

Runner

Driver communicating with the WiFi chip.

Scanner

WiFi network scanner.

State

Driver state.

Enums

AddMulticastAddressError

Multicast errors.

PowerManagementMode

Power management modes.

Traits

SpiBusCyw43

Custom Spi Trait that only supports the bus operation of the cyw43 Implementors are expected to hold the CS pin low during an operation.

Functions

new

Create a new instance of the CYW43 driver.

Type Aliases

NetDriver

Embassy-net driver.