Cannot build Teensy20 project with USB Type: "MIDI"

[venelinpetrov]

Configuration

Operating system:
Windows 7 Professional

PlatformIO Version:
2.11.1

Description of problem

The build_flags = -USB_MIDI flag does not seem to take effect, because midi specific methods are not recognized during compilation (e.g. usbMIDI.sendControlChange();)

Steps to reproduce:

1. Initialize teensy20 project. You should have the following config:

   [env:teensy20]
   platform = teensy
   framework = arduino
   board = teensy20

2. Add this entry to platformio.ini

   build_flags = -USB_MIDI
   # or build_flags = -DUSB_MIDI

3. Execute

   pio run
   

Actual Results

Exception is thrown saying that usbMIDI is not recognized

Expected Results

Successful compilation

[ivankravets]

@valeros please re-assign this issue to me when will fix it. I'll add this info to docs.

[ivankravets]

Docs: http://docs.platformio.org/en/latest/platforms/teensy.html#teensy-2-0-and-usb

[venelinpetrov]

Just to avoid any misunderstanding I would like to underline that the problem (and the fix also) does not seem to depend on the teensy board version. I tested it now with teensy 3.0 project and the behavior is the exact same. You can unmention the version in the documentation if you like.

[ivankravets]

Thanks a lot! I've just updated the docs.

P.S: Does this build work with Teensy 2.0?

[venelinpetrov]

Yes, testing with the latest development version, the code compiles and uploads successfully to a physical board. Also needed to add the build_flags = -D USB_MIDI entry as the documentation suggests.
Thanks for the effort, really. Actually, I came up with a similar solution today, but couldn't find time to dig enough in the code in order to verify it.

[ivankravets]

Thank you, that reported!

Happy coding! 😊