Performance analysis of SPI drivers for ATBEN

Ron K. Jeffries rjeffries at
Wed Apr 10 19:01:42 EDT 2013


What motivated you to conduct this investigation? Have you hooked up Ben NN
with some MCU-based system using SPI on the Ben? Or wa sthis mainly
targeted at using the atben 802.15.4 radio board you designed?


p.s. "DirtPAN" remains high on my list of creative protocol names. How
high? At the very top.

Ron K. Jeffries

On Wed, Apr 10, 2013 at 10:56 AM, Werner Almesberger <werner at
> wrote:

> Lluís Batlle i Rossell wrote:
> > It's not about general SPI.
> spi-jz4740-gpio.c is actually a fairly generic SPI master.
> It has only these constraints:
> - as the name suggests, the CPU must be a Jz4740,
> - MOSI, MISO, and SCLK must be on the same port,
> - there's a little extra delay for the AT86RF23x (which other
>   slaves would simply not notice).
> So yes, if you need a kernel SPI master and are using UBB or
> some similar Jz4740 setup, then you could use this one.
> - Werner
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