Re: trying to "reverse engineer" protocol from USB Ir dongle

On 8/17/07, [email protected] <[email protected]> wrote:
> I'm a newbie here, and don't really know if I have the right list.  I
> apologize if I am screwing up.

Try the lirc_mceusb2 driver.

There is a specialized mailing list for remote controls.
https://lists.sourceforge.net/lists/listinfo/lirc-list

>
> ----------------------------------------------------------------------------
> I have an infrared remote control and an accompanying USB connected
> receiver.  It's a small box on the end of a cable, which I suppose is
> called a dongle?
>
> lsusb gives me this:
>
> Bus 001 Device 005: ID 0609:031d SMK Manufacturing, Inc.
> Device Descriptor:
>   bLength                18
>   bDescriptorType         1
>   bcdUSB               1.10
>   bDeviceClass            0 (Defined at Interface level)
>   bDeviceSubClass         0
>   bDeviceProtocol         0
>   bMaxPacketSize0        16
>   idVendor           0x0609 SMK Manufacturing, Inc.
>   idProduct          0x031d
>   bcdDevice            0.00
>   iManufacturer           1 SMK
>   iProduct                2 eHome Infrared Transceiver
>   iSerial                 3 SM003J61
>   bNumConfigurations      1
>   Configuration Descriptor:
>     bLength                 9
>     bDescriptorType         2
>     wTotalLength           32
>     bNumInterfaces          1
>     bConfigurationValue     1
>     iConfiguration          0
>     bmAttributes         0xa0
>       (Bus Powered)
>       Remote Wakeup
>     MaxPower              100mA
>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        0
>       bAlternateSetting       0
>       bNumEndpoints           2
>       bInterfaceClass       255 Vendor Specific Class
>       bInterfaceSubClass    255 Vendor Specific Subclass
>       bInterfaceProtocol    255 Vendor Specific Protocol
> ...
>
>
> I haven't been able to find a driver for it.  I've seen screen-shots of
> Windows systems call it a HID device, but, as far as I can tell, Linux
> does not recognize it as such.  From what I can gather, the device's
> protocol hasn't been disclosed.  (from above: Vendor Specific Protocol)
>
> I hacked up the usb-skeleton driver so that it binds to this device, and
> so that I can read from it in user-space.  My little user-space program
> then prints a hex dump, one byte byte at a time and one line for each
> complete read() call.  Here's an example of the output:
>
> (start reading...  then I quickly press and release button #1:)
>
> 84 b6 10 8b 07
> 84 8a 07 8b 10
> 84 8a 10 9c 10
> 84 8a 08 8a 07
> 84 8b 07 8a 08
> 84 8a 07 8a 08
> 84 8a 07 8a 08 84 8a 08 89 08
> 84 93 08 89 08
> 84 8a 08 8a 10
> 84 8a 08 89 08 84 8a 08 8a 08
> 84 92 11 89 08
> 84 8a 08 8a 08 84 89 08 8a 08
> 84 89 08 8a 08
> 84 8a 08 92 7f
> 84 7f 7f 7f 7f
> 84 7f 7f 7f 7f
> 84 7f 7f 7f 7f
> 83 7f 7f 5f 9f 01 01 9f 15 00 00 80
>
>
> I've been looking at the device output for couple days and, while I have
> found some (obvious) patterns, I haven't found anything in the output
> that I can use to reliably determine which button has been pressed.
>
> I hope someone out there might have experience figuring out this sort of
> thing, because I don't and I could use some help/guidence.
>
> Thanks,
>
> - Chris
>
>
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-- 
Jon Smirl
[email protected]

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