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[avrdude-dev] [bug #40615] Doesn't work with JTAGICE3 firmware 3.18

From: Dennis Lambe Jr.
Subject: [avrdude-dev] [bug #40615] Doesn't work with JTAGICE3 firmware 3.18
Date: Mon, 18 Nov 2013 01:09:43 +0000
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:24.0) Gecko/20100101 Firefox/24.0


                 Summary: Doesn't work with JTAGICE3 firmware 3.18
                 Project: AVR Downloader/UploaDEr
            Submitted by: malsyned
            Submitted on: Mon 18 Nov 2013 01:09:42 AM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Dennis Lambe
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any



I used Atmel Studio 6.1 to upgrade the firmware on my JTAGICE3 from 2.15 to
3.8. After doing so, AVRDUDE begins reporting:

avrdude: usbdev_open(): did not find any (matching) USB device "usb:"

I investigated, and it turns out that the USB descriptors for firmware 3.8 are
completely different from 2.15.

The Product ID has changed from 0x2110 to 0x2140. There are now two
interfaces: one HID interface named "JTAGICE3 CMSIS-DAP" (the same name as in
the iProduct string) with an Interrupt endpoint IN/OUT pair; and one
vendor-specific interface named "JTAGICE3 Data Gateway" with a Bulk endpoint
IN/OUT pair.

I have attached the output of lsusb on the device.

This forum thread suggests that the Data Gateway interface isn't needed for
AVR programming:

I haven't been able to dig up any information about whether the protocol on
the HID Interrupt endpoints has anything at all to do with the 2.x USB

Maybe there are some clues in this release notice:


File Attachments:

Date: Mon 18 Nov 2013 01:09:42 AM GMT  Name: lsusb-jtag3-3.8.txt  Size: 4kB  
By: malsyned



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