Am 2009-01-23 14:48:33, schrieb Rodolfo Giometti:
> On Fri, Jan 23, 2009 at 10:23:05AM +0100, Peter Korsgaard wrote:
> > Not only that, it's afaik about doing i2c bus multiplexing where the
> > multiplexers are themselves i2c devices - E.G. stuff where you might
> > need to recursively call into the i2c core.
>
> I did exactly as you say. I have a custom board with a PCA9540 which
> is a i2c multiplexer controlled by i2c bus.
Here too, but using a Maxim MAX7367 and MAX7369 and here you will run
into trouble, because the first one is a Switch/Multiplexer and the
second one a Multiplexer only.
Runing an Atmel AT91SAM7S and doing RAW coding is no problem, but using
my Atmel AT91SAM7SE (64MB NAND, 32 MB SDRAM) using Linux is (currently)
the hell.
> > I have been doing i2c multiplexers where the multiplexers themselves
> > are not controlled through i2c for years without problems.
So you use those Multiplexer only for level switching where even on
different ports the Address is unique? This is working with the Maxim
chips too.
But in my "24V DC modular ATX PSU" (like a striped down UPS) I have on
the first Port the standard ATX outputs and the other three Ports are
connected to Expansion slots...
Since no one know, which Expansion modules are connected, I can not have
unique addresses for the I²C devices...
Used Devices are:
DS1780 Hardware Monitor
DS28CZ04 4kbit EEPROM (stores module infos)
MAX1036 4-Channel 8-Bit ADC
MAX1038 12-Channel 8-Bit ADC
but not limited too.
> However I'm going to publish my job on i2c multiplexers ASAP, maybe
> you can take a look at it and verify if it fixes your needs.
I hope I hear you soon...
Thanks, Greetings and nice Day/Evening
Michelle Konzack
Systemadministrator
24V Electronic Engineer
Tamay Dogan Network
Debian GNU/Linux Consultant
--
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
<http://www.tamay-dogan.net/> <http://www.can4linux.org/>
Michelle Konzack Apt. 917 ICQ #328449886
+49/177/9351947 50, rue de Soultz MSN LinuxMichi
+33/6/61925193 67100 Strasbourg/France IRC #Debian (irc.icq.com)
Attachment:
signature.pgp
Description: Digital signature
