Add support for Spresense

[Teggu]

Please add support for Spresense

Document : https://developer.sony.com/develop/spresense/docs/home_en.html

[maxgerhardt]

Are you more interested in the Arduino core or Spresense SDK (aka, NuttX)?

[Teggu]

I'm interested in the Arduino core.

[maxgerhardt]

I've started working on https://github.com/maxgerhardt/platform-sonyspresense, but it's not finished yet.

[maxgerhardt]

@EguchiTomoaki The platform is ready for its first test with a real board, but I don't have one. Can you follow the instructions at https://github.com/maxgerhardt/platform-sonyspresense and see if arduino-blinky works?

[Teggu]

arduino-blinky worked on all cores.
Also, when I tried changing the LED_BUILTIN on line 3 to LED1, LED1 blinked normally. *(1)
I will try other sample programs from now.

↓ (1) Blinking of LED1

IMG_6051.MOV

[maxgerhardt]

That's great!

Does the Serial output from the arduino-blinky example also appear when using the "monitor" task?

And in the examples do the GNSS and multiprocessing-message examples work too? (Latter one has special instructions for flashing).

[Teggu]

I confirmed that arduino-blinky outputs serial every second as shown in the picture.

I also confirmed that GNSS successfully obtains location information from GPS.

And I confirmed that multiprocessing-message can communicate with the main core and all sub-cores as shown in the video below.

Untitled.mov

These three examples are working as well as they did when run on the Arduino ide so far.

[maxgerhardt]

Great, I'll add the MP3DEC downloader and MP3Player sample in a bit for you to test, but it seems it all works properly and is equal with the Arduino IDE featureset.

[Tanmax-Payne]

Thanks devs for supporting this not-so-mainstream MCU, is there any usable progress in the main for the main branch?

[maxgerhardt]

I've updated the project to use the latest SPresense Arduino core v3.2.0 and added more examples. (Update per instructions).