IIC driver which supports microcode patch

[Dan Winkler]

I've attached an iic driver which is a modified
version of the one by Dan Malek and Kim Jorgensen.
Thanks for the initial effort.  After many hours of
trying different scenarios I've finally found the
trick to the microcode patch.  What you have to
understand with the microcode path is that the
parameter ram is relocated and you must initialize the
Rx/Tx parameters manually (i.e. the init Tx/Rx command
is not available due to the relocation).  Info on the
microcode patch can be found at
http://www.mot.com/SPS/ADC/pps/subpgs/etoolbox/8XX/i2c_spi.html.
 Attached is the updated iic driver and a spi driver
in development.  The spi driver is from Matthew Locke
over at Montevista.  I've been working on this spi
driver for quite a while and am having trouble with it
in interrupt driven mode.  I was wondering if anyone
could look it over and see if I am doing something
generally wrong.  It is in slave mode and the device
attached just takes data in (i.e. the Clock is always
on, only the SMIMISO pin is connected and the Enable
pin is always active).  Any possible reasons why the
"write" always times out would be appreciated.  Thanks

-Dan Winkler

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