Re: [OpenOCD-devel] SAM3N with wrong device id

[Paul F. <fer...@gm...>]

On Sun, Dec 22, 2013 at 03:37:33PM +0100, axel wrote:
> My fault: JTAGSEL was high; I thought the JTAG is activated instead of
> IO operation.
> 
> Now the original 'at91sam3nXX.cfg' is working. But the error:

Ok, nice. So it presents the usual Cortex-M ID when it's not in JTAG
Boundary Scan mode.

> Warn : Invalid ACK 0x6 in JTAG-DP transaction
> Polling target at91sam3n.cpu failed, GDB will be halted. Polling again
> in 100ms
> Polling target at91sam3n.cpu failed, GDB will be halted. Polling again
> in 300ms
> __
> 
> still happens. Is it because of a virgin chip?

Might be so. Or probably the wires are too long. Or probably you need
to issue "reset halt" or "reset init" and it'll start working. You
should also consider physically connecting SRST and using
"reset_config srst_only".

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