If you are modifying srst behavior can you add functionality so that I
can define how long is the srst reset as well as how long after srst
pulse JTAG controller waits before initiating scan?


On Mon, 2009-09-14 at 20:35 +0200, Øyvind Harboe wrote:
> On Mon, Sep 14, 2009 at 7:42 PM, David Brownell <[email protected]> wrote:
> > On Monday 14 September 2009, Ųyvind Harboe wrote:
> >> I suspect there are JTAG controllers that do not communicate when
> >> SRST is asserted, but do not pull TRST.
> >>
> >> srst_pulls_trst will kinda work on these devices i.MX27(??).
> >>
> >> The first thought that strikes me here is to split out srst_pulls_trst into
> >> two flags: pulls trst and no JTAG communication during srst....
> >
> > What code do we have which wants JTAG chitchat during SRST?
> 
> I thought arm7/9 did this, but I was wrong. I'm wondering if
> XScale needs this.
> 
> Turns out after some more testing that i.MX27 does appear to
> pull trst during srst.
> 
> > Or is the issue just that we haven't been able to grow such
> > code because of that issue?
> >
> > Just adding a new flag ought to suffice...
> 
> It's on my watch list, but the case I thought I had (i.MX27) turned
> out to be something else.
> 
> 

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