Re: [avrdude-dev] EDBG is up for testing

[Rick Mann]

That sounds great, Joerg!

Tell me, if I'm developing an Xmega-based board, what debug/programming related 
peripherals do I want to make accessible? USB and PDI?

-- 
Rick

On Feb 28, 2014, at 13:37 , Joerg Wunsch <address@hidden> wrote:

> Hello everyone,
> 
> implementation of the Atmel EDBG protocol is mostly done now.  All is
> in SVN, so anyone who wants (and can) is invited to test it.
> 
> Basically, the protocol is a wrapper around the old existing JTAGICE3
> protocol, so all the internals have not been touched. (*) The fact the
> debugger is using EDBG protocol is detected by the occurence of the
> substring "CMSIS-DAP" in the USB product string, as this is mandated
> by the CMSIS-DAP document.
> 
> (*) There's one difference, the SPI_MULTI command which AVRDUDE is so
> fond of is no longer supported in ISP mode.  I have yet to verify
> whether we would still want to use it somehow.
> 
> In order to allow for the JTAGICE3 with both, the old V2.x (non-EDBG)
> as well as the 3.x (EDBG) firmware to be detected, I extended the
> "usbpid" key in programmer definitions in the config file to allow a
> list of USB PIDs.  However, even though it's syntactically allowed,
> most programmer implementations ignore the list and only take the
> first USB PID that has been given in the file; only the "jtag3"
> programmer implementation has been extended to really handle the list.
> Each given USB PID is then probed successively, until a match was
> found (or none at all).  That way, one can always specify "-c jtag3"
> on the commandline, regardless of the firmware version (and thus
> different USB PID, 0x2110 vs. 0x2140).
> 
> Since the protocol is just the same, the new debug dongle called
> "Atmel-ICE" (**) is also supported that way.  (This refers to the AVR
> part, obviously.  Regarding the ARM part, I'd hope that a CMSIS-DAP
> aware OpenOCD would be able to talk to that.)
> 
> (**) 
> http://store.atmel.com/PartDetail.aspx?q=p:10500375;c:100112#tc:description
> 
> Also supported is the onboard EDBG chip that can be found on the new
> "Xplained Pro" evaluation boards.
> 
> If all goes well, I intend to roll a release anytime soon.
> 
> Not yet done: I didn't do any attempt to implement a Win32 variant
> that uses the Win32 API HID library.  By now, only the libusb backend
> is done.  If anyone wants to step forward and attempting an
> implementation based on the Win32 HID API, they are most welcome.  The
> advantage for Windows users there is that they don't need a separate
> driver.  (Windows doesn't offer a real generic USB driver as the
> various Unices do.)
> -- 
> cheers, Joerg               .-.-.   --... ...--   -.. .  DL8DTL
> 
> http://www.sax.de/~joerg/
> Never trust an operating system you don't have sources for. ;-)
> 
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-- 
Rick

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