Failed to run blinky under Ubuntu 12.04

[fff]

$ sudo ruby1.9.3 test.rb
/var/lib/gems/1.9.1/gems/libusb-0.2.2/lib/libusb/constants.rb:46:in `raise_error': LIBUSB::ERROR_IO in libusb_submit_transfer (LIBUSB::ERROR_IO)
    from /var/lib/gems/1.9.1/gems/libusb-0.2.2/lib/libusb/transfer.rb:135:in `submit!'
    from /var/lib/gems/1.9.1/gems/libusb-0.2.2/lib/libusb/transfer.rb:162:in `submit_and_wait!'
    from /var/lib/gems/1.9.1/gems/libusb-0.2.2/lib/libusb/dev_handle.rb:390:in `control_transfer'
    from /var/lib/gems/1.9.1/gems/libusb-0.2.2/lib/libusb/compat.rb:316:in `usb_control_msg'
    from /var/lib/gems/1.9.1/gems/blinky-0.0.12/lib/device_recipes/delcom_engineering/visual_indicator_gen_two.rb:35:in `set_colour'
    from /var/lib/gems/1.9.1/gems/blinky-0.0.12/lib/device_recipes/delcom_engineering/visual_indicator_gen_two.rb:27:in `off!'
    from /var/lib/gems/1.9.1/gems/blinky-0.0.12/lib/device_recipes/delcom_engineering/visual_indicator_gen_two.rb:22:in `warning!'
    from test.rb:5:in `<main>'

[  256.978955] usb 2-1.2: usbfs: process 3627 (ruby1.9.3) did not claim interface 0 before use

$ gem list

*** LOCAL GEMS ***

blinky (0.0.12)
chicanery (0.1.5)
ffi (1.9.3)
libusb (0.2.2)
mini_portile (0.5.3)
nokogiri (1.6.1)

$ dpkg -s libusb-1.0-0-dev
Package: libusb-1.0-0-dev
Status: install ok installed
Priority: optional
Section: libdevel
Installed-Size: 898
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Architecture: amd64
Source: libusb-1.0
Version: 2:1.0.9~rc3-2ubuntu1
Depends: libusb-1.0-0 (= 2:1.0.9~rc3-2ubuntu1), libc6-dev | libc-dev
Description: userspace USB programming library development files
 Library for programming USB applications without the knowledge
 of Linux kernel internals.
Homepage: http://www.linux-usb.org/
Original-Maintainer: Aurelien Jarno <aurel32@debian.org>

Not sure what's the cause

[perryn]

Hi there,

Sorry for the delay responding - did you manage to get it working at all?

cheers
Perryn

[fff]

Not really, we switched to host it in Windows, and it works fine.

[Aurenkin]

Hi,

I'm also experiencing this same issue. Sounds like you threw in the towel, fff, but were you able to make any progress before then?

Cheers,

John

[perryn]

Hi Aurekin

I'd like to get to the bottom of this - Would you be able to make code changes and try them out on your system?

Perryn

[Aurenkin]

I'd be happy to. Also not sure if this helps or if I'm going in totally the wrong direction but I noticed in my lsusb output for my build light:

Bus 001 Device 023: ID 0fc5:b080 Delcom Engineering 
Device Descriptor:
 .....removed for brevit....
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
Device Status:     0x0002
  (Bus Powered)
  Remote Wakeup Enabled

Looks like wMaxPacketSize is 8 bytes but libusb is sending:

submit transfer #<LIBUSB::Call::Transfer:0x00000004c72af0> buffer: #<FFI::Pointer address=0x007fd698131dc0> length: 16 status: :TRANSFER_COMPLETED callback: #<FFI::Function address=0x007fd6bf0c00c0> dev_handle: #<FFI::Pointer address=0x007fd6981309e0>

which seems to be 16 bytes?

Again, just messing around and clutching at straws but thought maybe it's useful.

[perryn]

heh - no idea :)

In the meantime try adding

begin
    @handle.usb_detach_kernel_driver_np(0)
 rescue LIBUSB::ERROR_NOT_FOUND
     # Already detached
 end
 @handle.set_configuration(device.configurations.first)
 @handle.usb_claim_interface(0)

after line 5 in light.rb?

Also, what version of Ubuntu are you running?

[Aurenkin]

I'm running 14.04.

I added your code and I'm now getting

ActionController::RoutingError (undefined local variable or method `device' for #<Blinky::Light:0x000000049fc8e8>):
  app/controllers/light_controller.rb:7:in `<class:LightController>'
  app/controllers/light_controller.rb:5:in `<top (required)>'

Sounds like it might relate to light.rb:11 (@handle.set_configuration(device.configurations.first))

Also as an aside, I'm a Melb based TWer, just started at the beginning of the year. I'm working with Ranjeet and he mentioned that he knew you when we came across this project. Small world!

[perryn]

doh

In that case, instead of calling device.open in LightFactory and constructing Light with the result, you'll need to construct Light with the device and call open to obtain the handle.

[Aurenkin]

Working like a charm, now. Posting my light_factory.rb and light.rb for reference:

light_factory.rb

module Blinky
  class LightFactory

    def self.detect_lights plugins, recipes
      lights = []
      found_devices = [] 
      USB.devices.each do |device| 
        found_devices << device  
        matching_recipe = recipes[device.idVendor][device.idProduct] 
        if matching_recipe
          lights << Light.new(device, matching_recipe, plugins)
        end
      end
      raise NoSupportedDevicesFound.new found_devices if lights.empty?
      lights
    end

  end
end

light.rb

module Blinky
  class Light

    def initialize device, recipe, plugins
      @handle = device.open
      begin
        @handle.usb_detach_kernel_driver_np(0)
      rescue LIBUSB::ERROR_NOT_FOUND
         # Already detached
      end
      @handle.set_configuration(device.configurations.first)
      @handle.usb_claim_interface(0)
      self.extend(recipe)   
      plugins.each do |plugin|
        self.extend(plugin)
      end    
      self.init      
    end

    def where_are_you?
      5.times do
        failure!
        sleep(0.5)
        success!
        sleep(0.5)
      end
      off!      
    end

  end
end

[perryn]

awesome, now we just need to make sure it still works on other platforms

[Aurenkin]

Sounds like a plan. I can check it on a Mac and possibly a Windows machine if that would help?

[perryn]

it would, but I bet it wont work ;)

[RReichert]

had the same issue with my linux x64 machine, with the patch you guys figured out, its now working like a charm. thanks