[i2c] newbie: connection problem with parallel port
baddemanax at hotmail.com
Mon Nov 6 16:39:34 CET 2006
I would like to connect my pc running damn small linux ( kernel 2.4.26) via
the parallel port to a i2c chip PCF8584.
I used a philips like adapters on the parallel port ( using the following
pining : pin 17 for the SCL output, pin 15 for the SCL input, pin 9 for the
SDA out , pin 11for the SDA in ...)
I did the following modprobe :
What i got from this are two files in /proc/bus.
the first one is i2c which contains : i2c-0 i2c Philips parallel port
adapter bit-shift algorithm
the other one i2c-0 is empty
when i look in the dev folder, nothing is present: ls /dev/i2c* is empty
Then i cannot used any C application to communicate with the the PCF8584 as
it expects any files in the /dev/i2c*
As i am a newbie in this field maybe i did something wrong.
Are the pining i am using compatible with the driver ( driver version i see
with dmesg is 2.6.1 from 30/08/2001)
is there any problem possible with the default clock speed of the PC ( i
know that chip is rather old and cannot work at the actual i2c speed)
The chip address is 0x40 for reading and 0x41 fro writing)
Thanks in advance, i hope somebody will be able to help me out.
Zoé a trouvé le truc pour travailler en groupe sans crêpage de chignon.
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