ATtiny85

[orgua]

ATtiny85

[orgua]

You could try the latest release 0.9.0 from today. attinysupport is partly tested and should be improved now. had no chance to test my new code till now.

[palsbo]

Hi - Thank you.
I have tried the new version, and it is much better.

I do have som problems using OWFS. Some fields are not recognized ome
times. I suspect it is a timing issue, as it is not consistent.
Attached image show an example (r-locator).
Best regards
Erik

------ Original Message ------
From: "inʒo" [email protected]
To: "orgua/OneWireHub" [email protected]
Cc: "palsbo" [email protected]
Sent: 20-03-2016 20:43:11
Subject: Re: [OneWireHub] ATtiny85 (#3)

You could try the latest release 0.9.0 from today. attinysupport is
partly tested and should be improved now. had no chance to test my new
code till now.

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You are receiving this because you authored the thread.
Reply to this email directly or view it on GitHub

[orgua]

image upload seems not to have worked

[palsbo]

Sorry - try again:

[palsbo]

I just tested with a DS9490 usb-stick. Here the ow-slave will not show at all.

[palsbo]

After changing ONEWIRE_TIME_READ_STD in OneWireHub.h from 30 to 20, things seems to works much better on ATtiny85. Even with DS9490. Not finished testing yet!

[orgua]

Yes, this could help as a dirty fix and can even be reduced to 15 µs. switching between the functions() adds a large amount of additional overhead. 80 clock cycles make up 10 µs on your platform. i will reduce this overhead-footprint in future commits.
We can't just switch to ASM, because it wouldn't be platform-independent anymore.
For the next 3-4 weeks i won't have hardware to test new code, so there will be no commits from my side. Feel free to research this topic in the meantime.
I collected more timing-related information from various datasheets in an older version of the onewirehub.h :
https://github.com/orgua/OneWireHub/blob/3e67d91e2ee7c040fbeb315949272b38393196c5/src/OneWireHub.h

[orgua]

is there something new on your side? i am beginning to continue my work on the lib

[orgua]

closing because thread is inactive.

[palsbo]

Sorry for the big delay - there was a reason!
In the meantime there are new version and I cannot get it to work with ATTiny85 (and DS9490)
I tried to look into the timing, but nothing helped.
Try DS2431 with PB2 as ow-input pin. 8Mhz clock
Any suggestions?