Hi Angelo,
Angelo Compagnucci wrote:
Hi Alex,
2015-05-19 15:34 GMT+02:00 Angelo Compagnucci<angelo.compagnu...@gmail.com>:
Hi Alex,
2015-05-19 13:59 GMT+02:00 Alex Beregszaszi<a...@rtfs.hu>:
Hi,
Angelo Compagnucci wrote:
Dear Bernhard Kraft,
2015-05-18 18:53 GMT+02:00 Bernhard Kraft<kra...@think-open.at>:
But for now I think I will just publish the Arduino sketch and a sample
implementation on how to access I2C devices with it.
Probably we should stick to other protocol driver implementation, but
from a rapid analisys, this will be the second in kernel serial to i2c
adapter, so I think there is not such a string standard protocol in
this field.
Please publish your sketch, I think making the driver is really not a
complex matter!
Count on me for any help, I really like the idea to have my name on
such an interesting project!
I have worked on some I2C drivers for Linux, as well as Arduino and
searched for cheaper options countless times. Yesterday's email made me to
search again and really liked the way one of products I've mentioned was
structured.
Great! Looking at the kernel, the USB-ISS doesn't have a ready made
driver. This could be a counter argument cause we will use another I2C
over UART protocol.
I do plan to write a serio driver. Might not happen. The reason I
liked this protocol is because one can buy an actual manufactured
device, while others can resort to the Arduino sketch.
So I sat down and wrote an Arduino implementation of that specification just
to see what the performance would be. You can find it at:
https://github.com/axic/dtiic
I had a quick look at code and it seems simple, readable and fastest
at least to sustain the 400khz mode of i2c.
BTW, I'm thinking on making an arduino code compatible with some of
the already in kernel driver and i2c-tiny-usb could be a really valid
candidate. This way we could only ask for a .ino inclusion in mainline
with some sort of documentation on how to cook a homemade I2C over
UART bridge.
The only downside of this approach is that we should write something
USB based, not UART, so it will limit the choice of usable Arduino
board to only the Leonardo.
I think we should stick for an serio based driver to be compatible
with all the boards.
I have no problem in writing such a driver, probably I will look into
this in the next few days.
Yes, if one can implement any USB device on the Leonardo and not just
HID that makes it really simple to support i2c-tiny-usb. Or
i2c-robotfuzz-osif for that matter.
The only current serio-based I2C bus is i2c-taos-evm which isn't even
full I2C, but smbus. Writing an Arduino sketch for that seems simple
enough too.
Best,
Alex
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