ATtiny85

[palsbo]

Hi - very nice work!

Has ATtiny85 been tested?

I have changed LED-pin to 3 and OW-pin to 2. Using ATtiny85 8 MHz Compile with Arduino IDE 1.6.7 - compile ok. Upload using Arduino Nano. - upload ok

Led is blinking, but device is not recognized. on OW master (using Raspberry Pi with I2C for OneWire and OWFS).

I have another implementation that works. Details and code here http://palsbo.com/arduino/OneWireSlave.html

[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" notifications@github.com To: "orgua/OneWireHub" OneWireHub@noreply.github.com Cc: "palsbo" erik@palsbo.com 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.

— 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?