max/embassy
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Modern embedded framework, using Rust and async.
33 Commits 67 Branches 32 Tags 16 MiB
Rust 98.9%
Shell 0.9%
Python 0.2%
acaa8b3e8b
Go to file
Jan Niehusmann acaa8b3e8b Fix calculation of slice index 
total_len is already rounded up, so the `+ 3` is not needed.
And even if it was, the calculation should have been `((total_len + 3) / 4)`.

`(total_len + 3 / 4)` is equivalent to `total_len` and can overflow
the slice, leading to a panic which can easily be triggered by sending
large ICMP ECHO packets to the device.
2022-08-30 20:37:02 +00:00
.vscode Get wifi credentials from envvars in example. 2022-07-21 23:50:40 +02:00
examples/rpi-pico-w Update Embassy. 2022-08-23 01:06:14 +02:00
firmware Obtain the firmware blobs from the user instead of hardcoding magic flash addrs. 2022-07-17 00:33:30 +02:00
src Fix calculation of slice index 2022-08-30 20:37:02 +00:00
.gitignore Obtain the firmware blobs from the user instead of hardcoding magic flash addrs. 2022-07-17 00:33:30 +02:00
Cargo.toml Update Embassy. 2022-08-23 01:06:14 +02:00
LICENSE-APACHE Add LICENSEs 2022-07-11 22:53:57 +02:00
LICENSE-MIT Add LICENSEs 2022-07-11 22:53:57 +02:00
README.md Get wifi credentials from envvars in example. 2022-07-21 23:50:40 +02:00
rust-toolchain.toml update rust nightly to match embassy. 2022-07-13 21:22:52 +02:00
rustfmt.toml 🌈 2022-07-10 19:45:26 +02:00

README.md

cyw43

WIP 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).
  • Sending and receiving Ethernet frames.
  • Using the default MAC address.
  • embassy-net integration.

TODO:

  • AP mode (creating an AP)
  • GPIO support (used for the Pico W LED)
  • Scanning
  • Setting a custom MAC address.
  • RP2040 PIO driver for the nonstandard half-duplex SPI used in the Pico W. Probably porting this. (Currently bitbanging is used).
  • Using the IRQ pin instead of polling the bus.
  • Bus sleep (unclear what the benefit is. Is it needed for IRQs? or is it just power consumption optimization?)

Running the example

  • cargo install probe-run
  • cd examples/rpi-pico-w
  • WIFI_NETWORK=MyWifiNetwork WIFI_PASSWORD=MyWifiPassword cargo run --release

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

The 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.

License

This work is licensed under either of

at your option.