Got i2c working ? Can you answer this ?

    I'm trying to get an i2c interface going, and I'm not quite sure
where my problems lie. Suffice to say, it doesn't work.

    I have built an Philips style adaptor. The software modules appear
to load OK, and I have this in /proc

# ls -l /proc/bus
-r--r--r--    1 root     root            0 Jun 29 18:18 i2c
-r--r--r--    1 root     root            0 Jun 29 18:18 i2c-0
dr-xr-xr-x    3 root     root            0 Jun 29 18:18 isapnp
# cat /proc/bus/i2c
i2c-0   i2c             Philips Parallel port adapter
Bit-shift algorithm
# cat /proc/bus/i2c-0
cat: read: Invalid argument
#

    What I don't understand is this problem with /proc/bus/i2c-0.

    Am I right in thinking that this file should contain the addresses
of all the devices on the i2c-0 bus ? and I should be able to read the
file shouldn't I ?

    Ignoring that problem for a moment - if I try to set the slave
address with something like

        if( ( r = ioctl(fd, I2C_SLAVE, addr)) < 0)
        {
                fprintf(stderr, "Error eeprom_open: %s\n",
strerror(errno));
                return -1;
        }

    then it errors out. This code snippet is from 'eeprog' which is a
simple program to access 24Cxx EEPROM devices available at
http://codesink.org/eeprog.html so I guess should work OK. I assume it
fails because it can't read the file /proc/bus/i2c-0

    So the problem is either with the adaptor I have built or the way
the modules have loaded.

    If I disconnect my adaptor, then I still get problems typing the
contents of /proc/bus/i2c-0 as above.

    Can someone with i2c working please confirm that I should be able to
type out the contents of /proc/bus/i2c-0 and that it contains addresses
of devices on the i2c bus