[lm-sensors] Microchip 24LC256

Thomas Loos tomloos at yahoo.com
Fri Mar 3 17:31:37 CET 2006


I took a look at the eepromer tools and I will try
them first before writing a full blown driver.

We wired up a test board for the 24LC256 part and
plugged it into an i2c header on our dev board.  The
part was wired up to be address 0x04.  I would like to
see i2cdetect find the chip at its address, but did
not.  Looking at the documentation for i2cdetect tells
me that this program does not detect all chips. Will
it work for the 24LC256?  If it doesn't, are there any
other tools that would get me past the step of seeing
the chip sitting on the bus at a particular address so
I can start reading and writing...

Thanks,
Tom
> 
> --- Mark Studebaker <mds at mds.gotdns.com> wrote:
> 
> > one of the userspace tools in prog/eepromer may be
> > sufficient for what 
> > you need. You could do a new chip driver for the
> big
> > eeprom but then you 
> > have to go through /sys files which is awkward for
> > eeproms;
> > look hard at doing userspace access through
> > /dev/i2c-x,
> > better and you don't have to write a new driver.
> > 
> > mds
> > 
> > 
> > Thomas Loos wrote:
> > > Hello All!
> > > I need to support three Microchip 24LC256
> EEPROMs
> > in a
> > > project.  We are using a ColdFire 5485,
> Freescale
> > > 2.6.10 distribution.  I2C is working and the
> > i2c-tools
> > > i2cset, i2cdump, and i2cdetect are compiled in
> to
> > the
> > > kernel.  Is this chip supported already?  If
> not,
> > I
> > > will be writing a driver, to be included
> > > with the lm_sensors package.  I have spent the
> > last
> > > few days reading the documentation, which is
> good,
> > but
> > > will most likely need your help!!!
> > > 
> > > Cheers!
> > > Tom
> > > 
> > >
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> > 
> 
> 
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