Re: [patch] NI DAQ-STC support for non-20MHz external timebase

On Wednesday 12 July 2006 02:51 am, you wrote:
> Thanks for the idea, Frank, but I don't think that will work for my
> application on the NI PXI-6031E (at least not conveniently or easily).
> I may not be understanding your idea fully/correctly, but it sounds like
> you're suggesting using GPTC resources to divide the external clock
> frequency to generate timing signals rather than using the existing
> frequency dividers already present in the various subdevices (e.g.
> analog in, analog out, etc).  That's not so great for me since I would
> need to use both of the 6031E's GPTCs (one for scan_begin and one for
> convert).  Please let me know if this is an incorrect interpretation.

No, that's not what I'm saying.  I'm saying I don't want different drivers 
coming up with different configuration instructions to perform the same 
function.

>
> AFAICT, INSN_CONFIG_TIMER_1 is not implemented in the NI drivers (it
> seems to only be implemented in cb_pcidas64.c), so it would still
> require a patch to the NI drivers.  Since I would need to use two GPTCs
> (again, please correct me if I've misinterpreted your idea), I think I
> would also need an INSN_CONFIG_TIMER_2.  Finally, if I use TRIG_OTHER
> for both scan_begin and convert, how would I tell the driver which timer
> to use for which?

That is what the data[1] element of INSN_CONFIG_TIMER_1 is for.  It 
specifies which trigger you are setting the divisor for.

-- 
Frank