On 3/4/2014 3:26 AM, alan.b.pearce@stfc.ac.uk wrote:
> And I don't follow your logic on how a timing loop causes a divide by 0 e=
rror. It just doesn't make sense.

The MDD (firmware) reads a variable 'N' from the SD card and then does x=20
=3D y/N. If it reads N=3D=3Dzero then I've got a divide by zero error. This=
 is=20
fundamentally bad programming to do a divide without checking the=20
denominator or having a way of nicely handling exceptions.

It's an issue with the SD card not being initialized properly.
I really like the fact that SD cards are so cheap, but they sure are=20
pretty terrible for embedded systems using them in SPI mode.

-
Martin K

--=20
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