Add OneWire support (Patch attached)

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Add OneWire support (Patch attached)

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Will be added later at the same time as SPI, I2C

Original comment by [email protected] on 22 Dec 2012 at 7:26

• Changed state: Accepted

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Original comment by [email protected] on 22 Dec 2012 at 7:26

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

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In progress, but I don't have any 1-Wire device to make some test...
is the w1-temp module mandatory for RAW and generic 1-Wire communication ?
I mean, is the device detected if you only load w1-gpio module ?

Original comment by [email protected] on 27 Jan 2013 at 10:16

• Changed state: Started

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The device will still show up without the w1-temp module but it will not give 
any data. This is for 1 wire temp sensors. Which is all I have. I imagine that 
other devices may need other modules.

Original comment by [email protected] on 27 Jan 2013 at 1:25

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Okay... thanks for feedback
I think I'll need to hand on some 1-wire devices...
I've designed something generic that suits UART, I2C and SPI, and I'd like to 
use the same approach for 1-wire

Original comment by [email protected] on 27 Jan 2013 at 3:03

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I will be happy to test against my one wire devices if you have a test build. I 
might even get a few more types of one wire devices on eBay (they don't cost 
much).

Original comment by [email protected] on 27 Jan 2013 at 3:19

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For sure, but I will not be able to buy all devices.
What devices do you have ?

Original comment by [email protected] on 27 Jan 2013 at 3:52

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Good find : http://www.maximintegrated.com/samples/

Original comment by [email protected] on 27 Jan 2013 at 4:28

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DS18B20 samples received and tested.
I first checked differences with and without w1-therm, then looked in w1* 
modules sources.
Getting a raw access to the 1-wire interface seems to be hard from Python and 
use w1-therm is certainly the best choice.
So I need to adapt my current design to load extra modules keeping a 
generalization for OneWire bus that will just load w1-gpio.
Adding other 1-wire device family like IO expander will then be easier.

Original comment by [email protected] on 1 Feb 2013 at 3:51

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working in r817, closes this issue.
only device listing is missing from the patch, it will be added as a more 
generic device listing to get all kinds of devices.

Original comment by [email protected] on 2 Feb 2013 at 4:08

• Changed state: Fixed

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Travelling at the moment so cannot try for a few days. Was looking at the code 
but cannot figure out where the onewire bit is. You have done a big refactor so 
maybe I am looking in the wrong place. Or is it possible you forgot to add the 
onewire file to version control? Thanks for adding onewire, I look forward to 
trying it.

Original comment by [email protected] on 2 Feb 2013 at 5:58

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oops, you totally right, i missed to add onewire.py before commiting others 
changes. now fixed.
you have to go in devices/sensor.py, for the starting point, wich then use 
classes in onewire.py

Original comment by [email protected] on 2 Feb 2013 at 6:26

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Sorry, but how do i use the patch ? is there a command to apply it ?

Original comment by [email protected] on 25 Mar 2013 at 6:13