Re: [avr-chat] USI

[Keith Gudger]

Joerg:

Thanks for your reply.  When you say "generating start conditions" are you
referring to using it as a UART or SPI/TWI?  Thanks.

Keith

On Wed, 22 Mar 2006, Joerg Wunsch wrote:

> Keith Gudger <address@hidden> wrote:
> 
> > 1) Has anyone used the USI to implement I2C or SPI?  Does it work as
> > well as the dedicated hardware?  Any known problems?
> 
> I tried, but was a bit frightened when then studying the appnote for
> it, and had to see that you've got a lot of ``legwork'' to do there.
> Things like generating start conditions aren't done by the USI for
> you, you have to pull the pins appropriately.  The USI then only does
> the actual bit shifting.
> 
> However, as the code is there (as usual, needs minor adaptations for
> GCC), I think you could use it as a starting point.
> 
> -- 
> cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL
> 
> http://www.sax.de/~joerg/                        NIC: JW11-RIPE
> Never trust an operating system you don't have sources for. ;-)
> 
> 
> 
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