Hi,
As I mentioned a while ago (see thread
http://tech.groups.yahoo.com/group/foxboard/message/3020), I was busy
studying and possibly trying to improve the current version of the I2C
driver.
Well, I've just finished reworking the I2C driver. The changes are
quite drastical. The changes result in a faster driver and now it can
cope with all possible cases (at least, the ones that I know of...).
The driver has been tested on several I2C components (see further) and
there are more to come...
I've created a zip file that contains the following items:
- a PDF file describing the changes, showing DSO plots and giving in
detail the timings of the current I2C implementation.
- a new I2C error header file i2c_errno.h (see PDF file for some
explanation)
- the changed i2c.h header file
- the changed etraxi2c.h header file
- the new I2C source file
- an example file which has been used to test the I2C driver on the
following devices:
* NVM 24C32
* PCF8574
* PCF8591
- Makefile to use for the example code.
- switches header file to activate one or more of the tested components.
Those interested can have a look over here:
http://tech.groups.yahoo.com/group/foxboard/files/GeertVc
All suggestions/improvements/remarks are welcome.
I would especially ask John Crispin to have a look at the driver (John
knows what I'm talking about...)
Best rgds,
--Geert
