Re: [ADuC_ARM] Issue on JTAG with Eval-Board ADuC7026QPS
first of all, try to check JTAG connections (all pins).
Without starting debug, can you download program into the ARM?
The message "... could not halt ARM core",
in my case, it was due to absence of external crystal
- and it was little bit difficult to halt ARM core by software.
Since for debug work, I always use external crystal.
There is also possibility, that you previously downloaded "corrupted" program
into ARM which is lost somewhere - this means execution of instructions and it
is sometimes also impossible to stop ARM core via JTAG.
In this case it is helpful fe."SEGGER J-Link Commander", that can effectively
stop ARM core.
Sometimes helps restart of keil.
> Hello Everybody
> I have a problem when going trough the GetStarted Guide of the
> ADuC7026 QuickStart Plus. There is happening something unexpected.
> I have gone trough the GetStarted Guide and done everything as
> described, but when I want to configure the RDI Interface Driver, as
> is described on top of page 8, then I get an error message: "Unknown
> device found on JTAG chain" "Failed to reset target, could not halt
> ARM core".
> I ignored this message and proceeded since I still could finish the
> configuration as described in the guide.
> But then the samething happens when I want to launch the debugger as
> described on page 10 chapter 2.5.
> When I start the debugger the same message as above pops up. When I
> click ok to this message, then the following message appears: "Failed
> to prepare for programming. Could not read target memory. Not all
> breakpoints may be available. Please check your Flash settings!
> When I click ok to this message, then again a message appears similar
> to that one I mentioned first.
> In the end there is no program downloaded to the controller. Instead I
> have the message: RDI-error 5: RDIError_DataAbort in the output window
> of the Keil IDE.
> Can you help me please.
> Best regards