I'll start reading the LDD book and I'll try to do what you described.
Thank you very much for your help!
--- In "Breton M. Saunders" <>
wrote:
>
> On 07/19/2010 04:00 PM, Simon wrote:
> > Awesome, I'll look into it.
> >
> > The hardware I'm communicating with is a 24-bit ADC chip (MAX11040) so I
> > need to be able to communicate at very high speeds if I want to take
> > advantage of its capabilities.
> >
> Funny.
>
> I was thinking of using one of those in a design.
>
> You will have to write a kernel driver; no user mode program will ever
> work at realtime rates for that chip.
>
> Use the SPI in PIO mode (e.g. not dma mode). You'll be doing about 3-4k
> interrupts per second, but the 9302 will handle that.
>
> The basic design is that you need a SPI driver writing into a ring
> buffer. The ring buffer must then be exposed to the user through a
> character driver interface.
>
> Cheers,
>
> -Brett
>
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