[SOLVED] Dfu-util does not recognize Photon on Arch Linux

Troubleshooting
1

Solution: Device must be in DFU mode (flashing yellow)

When connected via USB, dfu-util -l is supposed to list the Photon, but it does not on Arch Linux x86_64. There’s nothing wrong with the Photon; it works with the same version of dfu-util on the Mac.

The device is being created as crw-rw-rw- 1 root uucp 166, 0 Dec 15 04:44 /dev/ttyACM0.

`lsusb -v` shows it as:

`Bus 008 Device 004: ID 2b04:c006  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x2b04 
  idProduct          0xc006 
  bcdDevice            2.50
  iManufacturer           1 Particle
  iProduct                2 Photon
  iSerial                 3 2A0032001751353338363333
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           84
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          4 Composite
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass          2 Communications
      bFunctionSubClass       2 Abstract (modem)
      bFunctionProtocol       1 AT-commands (v.25ter)
      iFunction              10 Photon Serial
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol      1 AT-commands (v.25ter)
      iInterface             10 Photon Serial
      CDC Header:
        bcdCDC               1.10
      CDC Call Management:
        bmCapabilities       0x00
        bDataInterface          1
      CDC ACM:
        bmCapabilities       0x02
          line coding and serial state
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              16
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface             10 Photon Serial
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              9 Photon Control Interface
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0003
  Self Powered
  Remote Wakeup Enabled

Any ideas?

2

Is the Photon in DFU mode (blinking yellow) when you use dfu-util -l? It must be for that to work.

The lsusb above is what would be normally be displayed for a Photon in regular operating mode or listening mode (0x2b04:c006). It would be 0x2b04:d006 in DFU mode.

1 Like
3

Once you do get your Photon in DFU mode, you will need to use the following udev rules file if you want to be able to flash firmware without using sudo:

Also, if you want to be to easily build and flash firmware locally I would suggest trying po-util.

4

Ah. Operator error, sorry. Once it flashes yellow, I can see it with dfu-util -l, even from Arch running in VirtualBox on the Mac. Thanks!

2 Likes