Closed rscottm closed 10 years ago
Hey @rscottm,
I am definitely interested in getting some help on this. In particular, I'd like to get a USB adapter working and write at least on input adapter before releasing an alpha version of the gem. The USB adapter is a little tricky because the EV3 is a HID device, which prevents most (perhaps all) of the existing cross-platform usb libraries from working with it. Last I looked at it, I thought the easiest way forward would probably be wrapping hidapi.h
using ffi
in a separate gem, then using that gem to write an adapter similar to the wifi/bluetooth adapters. I started down that path, then other stuff kind of got in the way. I'd be happy to share that code if it's something you're interested in working on.
Justin
I don't have any experience with USB & HID, but I can give it a shot. I was looking at:
https://github.com/larskanis/libusb
It looks like it has some HID support.
On Sun, Aug 10, 2014 at 12:10 AM, jcnnghm notifications@github.com wrote:
Hey @rscottm https://github.com/rscottm,
I am definitely interested in getting some help on this. In particular, I'd like to get a USB adapter working and write at least on input adapter before releasing an alpha version of the gem. The USB adapter is a little tricky because the EV3 is a HID device, which prevents most (perhaps all) of the existing cross-platform usb libraries from working with it. Last I looked at it, I thought the easiest way forward would probably be wrapping hidapi.h using ffi in a separate gem, then using that gem to write an adapter similar to the wifi/bluetooth adapters. I started down that path, then other stuff kind of got in the way. I'd be happy to share that code if it's something you're interested in working on.
Justin
— Reply to this email directly or view it on GitHub https://github.com/jcnnghm/ruby-ev3/issues/1#issuecomment-51708110.
There may also be some tools to borrow from in the ev3dev repo: https://github.com/ev3dev/ev3dev although the approach there seems to be focused on command line tools.
How do you get this working on an EV3? Set up a debian install on a sim card, install ruby and then run it?
Really excited about this repo, BTW. Would love to help any way I can.
@jcnnghm @rscottm there's an old-ish repo for HID here: https://github.com/ozone1015/ruby-hidapi might be a starting point?
Update: NVM, looks like it's a dud, sorry
Another, more promising update: https://github.com/signal11/hidapi (arrived at via here: http://spin.atomicobject.com/2014/01/31/ruby-prototyping-ffi)
@grumpit asked: How do you get this working on an EV3? Set up a debian install on a sim card, install ruby and then run it?
I think you're asking about running this code on an EV3. It's not designed to do that. This code runs run on another machine to communicate with the EV3. I used it on a Mac communicating to the EV3 via bluetooth:
1) I used Ruby 2.1.2 2) gem install serialport 3) Clone the git repository 4) Change to the repository directory 5) rake console 6) require 'ev3/connections/bluetooth' 7) c = EV3::Connections::Bluetooth.new 8) b = EV3::Brick.new(c) 9) b.connect 10) b.beep
Hi @jcnnghm,
I came across your ruby-ev3 repository today, and am interested in helping out. I've been able to fire up the console, connect to a brick via bluetooth, and do the basics (beep & spin a motor). I'd love to help move this forward if you're interested.
I'm also interested in seeing if I can get his working with another project I work on ruboto (JRuby on Android):
https://github.com/ruboto/ruboto
Thanks, Scott