AVR-Chat

--- In AVR-Chat@yahoogroups.com, dlc <dlc@...> wrote:

>    I got the file.  The code looks stupid simple, how well does it
work
> and with what devices have you tried it?  The code seems pretty
obvious,
> but the demo routines in there don't seem complete, for instance:
>      if (!I2CPut(atod_reg, 2))
> atod_reg is never set to anything, it will be two bytes of zeros.
>
>    I'll give it a whirl, I've seen some code that uses the USI
interface
> to do I2C and it is about 10x more complex and isn't even interrupt
> driven (based on Atmel app note).  I'm not terribly impressed with the
> USI interface...

The code was written to talk to a TI ADS1110
<http://focus.ti.com/docs/prod/folders/print/ads1110.html>   chip.  I
have run it
successfully, though the full application is still under development
(it got pushed aside for nearly a year when work decided that something
else needed to be done first).

Yes, it is simple.  Once you have the low-level bit drivers written, the
rest is just stringing them together appropriately.

The USI could not be used for I2C, it was already in use talking SPI to
the
rest of the project.

I'll update the source files with some more examples of talking to the
ADS1110.  Check for a new version of I2C.ZIP in the files section.

Bill




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