On 26.03.2015 00:07, Andreas Fritiofson wrote:
>
>
> On Wed, Mar 25, 2015 at 11:26 PM, Michael Schwingen
> <mich...@schwingen.org <mailto:mich...@schwingen.org>> wrote:
>
> The results are:
> - Busblaster/KTLink works fine with a STM32F103 target, both with
> "reset_config none" and with "reset_config srst_only". When selecting
> srst_only, I can see a low-pulse on the reset line.
>
>
>
> - Busblaster/KTLink does not work at all with the LPC812. Even when
> selecting "reset_config srst_only", there is *no* reset pulse, the
> reset
> line stays high all the time.
>
>
> Well, I guess the obvious explanation would be that the reset line is
> either shorted high or broken on your LPC812 setup. But of course
> you've already checked that...
Nope - I hadn't, because on my previous attempts with the nucleo as
stlink, I had the LPC812 in reset continuously when connecting the line.
So, thanks for pointing out this possible problem - I just checked, and
the line is connected correctly (this is the target half of an LPC812
LPCXpresso board, with the useless lpc-link part cut off). When I pull
the pin on the connector low, the target is indeed in reset (the flashed
program stops and re-starts when releasing the line).
Even if I connect the SRESET output from the Busblaster-KTLink only to a
pullup and not to the target, the reset line stays high all the time
when trying to connect.
Now I am not sure if I *need* SRESET for the LPC812, but no signal when
I request "reset_config srst_only" at least looks a bit buggy to me.
cu
Michael
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