Ok, swapped over to cmsis-dap adapter and still no luck.
https://pastebin.com/6k6ULseG <https://pastebin.com/6k6ULseG>

Thanks for you help.


> On Jun 8, 2017, at 12:07 PM, Tomas Vanek <[email protected]> 
> wrote:
> 
> The cold-plug solution (4044) is for CMSIS-DAP adapter only.
> No wonder it does not work with J-Link.
> 
> On 08.06.2017 16:09, William Hanna wrote:
>> Tom,
>> I read your post, which I somehow missed when searching for a solution, and 
>> pulled the latest master. Changed atsamd91.c and cmsis_dap_usb.c to patch 
>> versions (4043 and 4044) and installed.
>> 
>> I got the following error:
>> https://pastebin.com/7L6i1TqW <https://pastebin.com/7L6i1TqW>
>> 
>> As I understand it the fix merged into the git master is for the DSU. Other 
>> patches are required for SAMD CPU extended reset.  
>> 
>> William
>> 
>> 
>> 
>>> On Jun 8, 2017, at 9:54 AM, Tomas Vanek < 
>>> <mailto:[email protected]>[email protected] 
>>> <mailto:[email protected]>> wrote:
>>> 
>>> On 08.06.2017 13:51, William Hanna wrote:
>>>> Has anyone had any success with using openocd to erase ATSAMDA1 or 
>>>> ATSAMC21 devices which have the security enabled?
>>>> 
>>>> The command:'at91samd chip-erase’ says it will erase the device when 
>>>> security enabled. However when the security is set openocd doesn’t appear 
>>>> to be able to run the ‘init’ command on the device successfully.
>>>> 
>>> Please see
>>> https://sourceforge.net/p/openocd/mailman/message/35704580/ 
>>> <https://sourceforge.net/p/openocd/mailman/message/35704580/>
>>> 
>>> http://openocd.zylin.com/4043 <http://openocd.zylin.com/4043> is already 
>>> merged  in git master.
>>> 
>>> Tom
>>> 
>> 
> 

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