Re: [OpenOCD-user] nrf51 stlink reset question

[Angus G. <gu...@pr...>]

On Tue, Dec 09, 2014 at 09:56:16PM -0800, Myles Watson wrote:
> Thanks for responding.  I need to investigate a little more thoroughly.  I
> tried holding the reset low manually, and it didn't seem to work.  Until
> that works, automating it may be overkill :)

Fair enough :)

For what it's worth, I actually just realised that automating it won't
be as hard as I first thought. I somehow thought the STLINK idled
SWDCLK high, but it idles low. So if you put a diode between SRST and
DIO, SRST can pull DIO low but not drive it high. Then you can use the
standard reset_config & reset functions to first enable srst, then
issue a reset which will pull SWDIO/RESET low.

That's assuming the STLINK isn't driving the DIO line high at that
time, I don't think it would be but that's definitely worth checking...

Angus