SAMD Architecture Support

[Spegs21]

I see that there have been a lot of questions regarding support of other platform looking through the readme but one that hasn't come up is the SAMD architecture, specifically the SAMD21 chip.

I think this should meet the raw HID requirements that many of the other chips do not. One drawback I see is the lack of an EEPROM but this could be mitigated with a flash storage library or external EEPROM.

I've made some preliminary changes to the library but don't have anything that compiles yet.

[Legion2]

Can you provide a list of arduino board names, which I can use to test SAMD. I only need the names to setup the compiler in arduino IDE.

[Spegs21]

Sure,

Official Arduino Boards:

• Arduino Zero
• Arduino MKR Zero
• Arduino Nano 33 IoT
• Arduino MKR WAN 1300
• Arduino MKR WAN 1310
• Arduino MKR NB 1500
• Arduino MKR1000
• Arduino MKR WiFi 1010
• Arduino MKR GSM 1400
• Arduino MKR Vidor 4000

Adafruit Boards:

• Trinket M0
• Feather M0
• Metro M0
• Gemma M0
• ItsyBitsy M0

Add via: https://adafruit.github.io/arduino-board-index/package_adafruit_index.json

[Legion2]

OK the EEPROM api has to be abstracted from the code, so it can be replaced when needed.

[Spegs21]

Is that the only issue you've found? I edit the HID files to allow ARDUIINO_ARCH_SAMD and the compiler complains about lack of USB_Send and TRANSFER_RELEASE depending on which board I select.

[Legion2]

https://www.arduino.cc/en/Reference/HID here only 32u4 based board, a Due and a Zero are supported

[Spegs21]

Have you enabled your #if blocks in RawHID.h/.cpp by changing: #if defined(ARDUINO_ARCH_AVR) to #if defined(ARDUINO_ARCH_AVR) || #if defined(ARDUINO_ARCH_SAMD)

I'm trying to compile for Arduino Zero (Native USB Port).

[Legion2]

no I didn't started coding, can you share your changes and open a PR?

[Spegs21]

I added the PR. I don't have much experience with the USB API and HID libraries so I don't know how much help I'll be with this.