Re: [OpenOCD-devel] ftdi/xds100v2 connection issues

[Andreas F. <and...@gm...>]

On Fri, Jan 24, 2014 at 3:27 PM, Alex Züpke <ale...@hs...>wrote:

> Hi Paul,
>
> Am 18.01.2014 17:32, schrieb Paul Fertser:
>
>  Hi,
>>
>> Does http://openocd.zylin.com/1884 help with this?
>>
>>
> It's getting better, but putting
>   init; ftdi_set_signal PWR_RST 1
> at the end of my config file doesn't help.
> I need to restart openocd to get a connection on 2nd try.
>

Actually, that won't work. The PWR_RST pin probably have to be toggled to
get the adapter to work at all. Then it must be done *before* init, but
then we do not have the ability to set the pin. Catch 22.

That's why we need to add (or find) a hook that's run after the adapter
driver is initialized but before the chain is examined.


> I'm using GIT Head and the stock tcl/target/ti_tms570.cfg, so I tried to
> hook the FTDI-reset into JTAG's post-reset event (see attached patch) and
> it works reliably, but I don't know if this is the right hook for that?
>

No, that's far too late unfortunately. Or does "works reliably" mean that
you get it working at the first attempt without having to restart?? That
would be odd.

/Andreas