Issue(s) with / ideas for the from-scratch section

[exo-cortex]

An issue I found is that when I add funtionality like in "pico_blinky.rs" I get errors, because "cortex_m" is not found and and "embedded_hal::digital::v2::OutputPin" does not work, because there seems to be no "v2" in there. (was there an update maybe that made parts of the code obsolete here?)

Another idea/suggestion i have for the from scratch example: it would be nice to include a directory tree of the from-scratch example (so there is also the memory.x and .cargo/config.toml) so it's easier to understand everything that is involved.

It would be nice for beginners if there would be one very simple example that works so that one can start from there.

I am unsure about which Cargo.toml is the one for pico_blinky.rs. I know there is the rp2040 project template, but that already seems to be very complicated compared to the from scratch-example. Especially the Cargo.toml's are really dense (what does "... = { workspace = true, optional = true } mean in this context?) Would it be possible to have just the most basic program explained completely somewhere? I feel the examples share the same Cargo.toml and therefor a lot of dependencies are not needed for

[9names]

"embedded_hal::digital::v2::OutputPin" does not work, because there seems to be no "v2"

If you are copying examples from a Rust project, it is very important to keep all the dependencies and features the same as what you are copying from - check the Cargo.toml! In this case, the examples + template are built primarily around embedded-hal 0.2 because that is what was available at the time they were written. I assume you've selected 1.0 or *, so it's not there any more.

Can I recommend, instead of starting from scratch and adding things until it works - start with the template and remove things until it stops working. Remember to build and run every time you remove something so you know what you need, and also what it looks like when it breaks.

[exo-cortex]

Hm that would work as well. I can try that. I started "from scratch" as that was a section in the Readme. Can you recommend a template - there is one, but as there are so many different repositories and interconnected Hal-related crates I am sometimes unsure about which are needed from which. Maybe the readme could also offer a link to the recommended base-template for the raspberry pi pico.

but thank you very much!

[9names]

https://github.com/rp-rs/rp2040-project-template

[ithinuel]

Remember to build and run every time you remove something so you know what you need

If you’re not already using it, I recommend cargo watch for that purpose. Fire cargo watch -x build from your project in a terminal, and enjoy modifying your files and see it being rebuilt any time you save.