Provide a way to identify board options via pluggable discovery

[cmaglie]

As per @PaulStoffregen comment:

How would you feel about extending Board Identification to allow JSON properties to match the menu options, so arduino-cli could know more of the FQBN?

VENDOR:ARCHITECTURE:BOARD_ID[:MENU_ID=OPTION_ID[,MENU2_ID=OPTION_ID ...]]

As I understand Board Identification, today arduino-cli can at best report the "VENDOR:ARCHITECTURE:BOARD_ID" portion of FQBN, because the spec only defines board.txt entries for matching the main part of FQBN.

If the Board Identification part of spec were extended slightly to specify boards.txt entries such as

{boardname}.menu.{menuname}.{menuoption}.upload_port.{identifier}=Value
{boardname}.menu.{menuname}.{menuoption}.upload_port.#.{identifier}=Value

then a discovery tools capable of detecting which menu options where used could report properties to match those lines. Future arduino-cli could use this property matching to give a more complete FQBN for the detected hardware. Then in an even farther future, the IDE could utilize the more specific FQBN to initialize those menu options when a user clicks the port+board from the toolbar's drop-down list.

I think it could be implemented exactly as described above.

[PaulStoffregen]

@cmaglie - Now with IDE 2.0-rc7 supporting pluggable monitor, I'm revisiting my package for Teensy to better integrate with IDE 2.0. Any chance some of this can get put into the Pluggable Discovery Specification with notes about future implementation? My hope is to implement it soon in my discovery tool, and sometime in the future CLI & IDE 2.0 will make use of the extra info.

[cmaglie]

Hi @PaulStoffregen

I've actually implemented it here: #1674
It's rebased on the current master, so it's up-to-date, but I've just barely tested, so weird things may happen...
If you want to try it here are the test builds: https://github.com/arduino/arduino-cli/actions/runs/2501986948

There are still some task to be done:

• add the documentation
• add more tests
• review the code

Considering my current priorities, this won't happen before July...

[PaulStoffregen]

Ran it here a few times and I'm happy to say Arduino CLI is picking it up the extra FQBN field nicely. So far my discovery tool is only detecting 1 of the FQBN menu parameters. Will try more soon...

In this run, IDE 1.8.19 programmed the hardware to be USB audio, and CLI board list is showing it properly with ":usb=audio" on the FQBN.

[ubidefeo]

@cmaglie @PaulStoffregen any updates on this one?

[PaulStoffregen]

@ubidefeo - I implemented this for Teensy's "USB Type" menu in version 1.57.0 of teensy-discovery. This is the package index to install 1.57.0, if you want to give it a try.

https://www.pjrc.com/teensy/td_156/package_teensy_index.json

Sadly, I haven't had time to add USB descriptors and code in teensy-discovery for Teensy's other 3 menus. Been crazy busy here dealing with supply chain problems. But teensy-discovery 1.57.0 definitely does support a "usbtype" property and package 1.57.0 has corresponding lines in boards.txt needed to build the FQBN with that menu setting, as in the screenshot above.