[Gumstix-users] i2c not working - robostix not running the correct program?

[Govind V. <gov...@gm...>]

Hi,
I am trying to get i2c-io to work between gumstix and robostix. I am
sure this has been done before, but I seem to be stuck and couldn't
find an answer in the mail archives- could someone please help me with
this:
I have successfully configured the gumstix for i2c and uploaded
i2c-load, i2c-io and uisp into it. I have also modified /etc/modules
to load the required modules for i2c.  I then used the
gumstix-robostix ISP to load the bootloader onto the robostix using
uisp. After removing the serial connection between the two, I inserted
the robostix_drv.ko module so that the robostix entry shows up in
/dev/. Then when I run the command:
---------------------------------------------------------------------------
i2c-load --reset 0x0b Info
---------------------------------------------------------------------------
it gives the expected result. I then used i2c-load to copy i2c-io.hex
into the robostix:
---------------------------------------------------------------------------
# i2c-load 0x0b Write /mnt/mmc/dwnlds/i2c-io.hex
Detected ATMega128
Write:  ##
Verify: ##
Verify sucessful
Write sucessful, rebooting...
---------------------------------------------------------------------------
My problem is that whenever I try the following command (I tried both
'info' as well as 'Info' in the command below), I only get one of the
two error messages given below:
---------------------------------------------------------------------------
# i2c-io 0x0b info
---------------------------------------------------------------------------
ERROR: I2cTransfer: CRC failed: Rcvd: 0x00, expecting: 0xce
ERROR: I2cReadBlock failed
ERROR: Unable to retrieve information from i2c address 0x0b
---------------------------------------------------------------------------
or
---------------------------------------------------------------------------
ERROR: I2cTransfer: ioctl failed: Remote I/O error (121)
ERROR: I2cReadBlock failed
ERROR: Unable to retrieve information from i2c address 0x0b
---------------------------------------------------------------------------
I observed that the red LED on the robostix was flashing approx: 2
times/sec. So i thought that the bootloader is running and I need to
get the i2c-io.hex to run. So I entered this command:
---------------------------------------------------------------------------
# i2c-load 0x0b Run
Detected ATMega128
---------------------------------------------------------------------------
Now the red LED started flashing much faster. I had read in the wiki
that it flashes 5 times/sec when its booting so I waited, but it jsut
keeps on flashing at the same frequency(Also this flashing was not
regular like the bootloader's - the flashing speed changes now and
then but the pattern I think is repeated every few seconds).
When I run the i2c-io info command, I still get the same error message
If i just use the i2c-load reset command, the LED goes back to
flashing the regular bootloader sequence.
The most interesting thing is if I turn of the gumstix using the
'poweroff' command, then the red LED starts flashing twice quickly and
then a pause when it stays lit - just as it is supposed to when i2c-io
is running on it.

Please advice on how to get i2c-io running properly.

Thanks and Regards,
Govind