Add binding for setSerialMessageCallback

[paulyoung]

Adds bindings and an example for playdate->system->setSerialMessageCallback

Please also see https://devforum.play.date/t/feature-request-add-a-userdata-argument-to-setserialmessagecallback/17333

Thanks!

[paulyoung]

Relates to #283

[boozook]

Thank you so much! I have to play with it and think about it a little bit.

[boozook]

I reviewed your solution as well as entire task and have to say that I was wrong when suggested "typed storage".
There is should be solution dramatically simpler.
Also in my example all callbacks are "oneshot" and removing immediately after call with store.remove::<F>() and later entire storage with clean_store. That's not needed for this case. This is like update callback registering, so we should be able set callback, receive calls multiple times and optionally "unsubscribe".

I've tested it this way:

# Build, install, run:
cargo playdate run -p=playdate-system --example=set-serial-message-callback --features=sys/lang-items,sys/entry-point --device
--no-read

# Then send messages:
pdtool send msg "one" && pdtool read
pdtool send msg "two" && pdtool read
pdtool send msg "three" && pdtool read
# ...

# Output:
# serial_message_callback: one
# PANIC: [api/system/src/storage.rs@24] "missed callback"

---

I've created PR for your PR ;)

[paulyoung]

Strange, I'm running into #326 on this branch despite having pulled in the fixes for that issue.

[paulyoung]

For some reason I'm still hitting ERROR: missing field `serial_num` at line 31 column 9

[paulyoung]

@boozook thanks for the PR. I was thinking this should be similar to set_update_callback but have been sick for a few days and didn't follow up.

[paulyoung]

To clarify, when I run cargo playdate run -p=playdate-system --example=set-serial-message-callback --features=sys/lang-items,sys/entry-point --device --no-read I hit the ERROR: missing field serial_num at line 31 column 9 error but otherwise everything on this branch seems to work for me so I don't think that's related or should hold up merging this PR.

I can try again once it's on main and follow up in #326.

[boozook]

I hope you doing well.

Just to be sure that you're using latest version:
Did you install cargo-playdate from this branch? If not so, plz do cargo run -p=cargo-playdate -- run -p=playdate-system --example=set-serial-message-callback --features=sys/lang-items,sys/entry-point --device --no-read.

[paulyoung]

Did you install cargo-playdate from this branch?

@boozook I did. I'll try again now from main and report back in #326