On Wed, Jan 11, 2012 at 05:21:24PM +0000, Wayne Tams wrote:
> Hi,
> 
> Just wondering if this is normal behaviour. When I do a SPI read to my
> slave device I get the data I want all seems fine.
> 
> When I look at the SPI bus on a logic analyser, after I write to MOSI
> to tell the device I am going to read I can see that my MOSI line has
> the same number bytes as those being read on MISO only that they are
> all NULL.

All SPI transfers are bidirectional.  For every bit clocked out you will get a 
bit clocked in.

g.

> 
> Thanks
> 
> Wayne
> 
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