Yes, The SPI interface would be preferred in my opinion. An SPI interface
for hostmot2 would allow the use of all sorts of hardware.
On Thu, Nov 25, 2010 at 9:56 AM, Peter C. Wallace <[email protected]> wrote:
> On Thu, 25 Nov 2010, Andy Pugh wrote:
>
> > Date: Thu, 25 Nov 2010 11:46:53 +0000
> > From: Andy Pugh <[email protected]>
> > Reply-To: EMC developers <[email protected]>
> > To: EMC developers <[email protected]>
> > Subject: [Emc-developers] 7i64
> >
> > I found a surprise package in my letterbox last night, a 7i64. This is
> > the 24 input / 24 output isolated IO board that communicates via the
> > same 5MBs serial protocol as the 8i20 motor driver.
> >
> > Two questions come to mind:
> >
> > 1) Does it make sense to create a fast-thread compatible function that
> > can link to the fast-thread Hostmot2 GPIO read/write functions?
>
>
> I dont think the maximum update rate of the 7I64 in serial mode (4 KHz or
> so)
> makes this of much use. The 7I64s SPI interface can update at around 200
> KHz
> so is suited to a fast base thread, but not the LBP serial.
>
> >
> > 2) Does it make sense to try to think of a way to assemble the pins
> > into variable-length bytes?
>
>
> Doesn't the weighted sum comp do that? (at least for inputs) dont know if
> the
> reverse function exists for outputs however
>
> >
> > --
> > atp
> >
>
> Peter Wallace
> Mesa Electronics
>
>
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