One-wire device control
Discovery
Posts: 606
in Propeller 1
What code can I use to communicate a Propeller 1 with one-wire devices?
Sincerely,
Discovery
Comments
Attached is the object I use, written by Cam Thompson.
-Phil
RIP Cam. You are missed.
I wrote a 1-wire object, too (it uses a Cam's CRC code; the rest is mine). I double-check all is well with a little DS1822 demo program.
Thank you.
I use the one-wire interface on BS2s which is really simple but I need more programming space. I will graduate to the Propeller 1.
The code looks difficult to use compared to BS2 basic.
Sincerely,
Discovery
It's really not. Give yourself a few days to learn Spin, and take things easy. What you'll find is that once you adapt to the new syntax, many things are really easy because the resources of the Propeller are so much greater than on the Stamp. Again, be patient with yourself and take it easy. Anything new is scary and looks difficult -- you'll get past that, and you'll get plenty of assistance in these forums when you need it. If you post a BS2 program, many of us can show you how to port it to the P1.
I agree with Jon about the simplicity. As an example, here's my driver for the MAX31820 1-Wire temperature sensor:
{{ ───────────────────────────────────────────────── File: MAX31820.spin Version: 1.0 Copyright (c) 2018 Bueno Systems, Inc. See end of file for terms of use. Author: Philip C. Pilgrim ───────────────────────────────────────────────── Call start first to establish pin number. Allow a second or so between calling convert and reading the new data. }} OBJ ow : "OneWire" PUB start(pin) ow.start(pin) PUB convert ow.reset ow.writeByte($cc) ow.writeByte($44) PUB tempF100 : temp temp := tempC100 * 9 / 5 + 3200 PUB tempC100 : temp ow.reset ow.writeByte($cc) ow.writeByte($be) byte[@temp][0] := ow.readByte byte[@temp][1] := ow.readbyte ~~temp temp := temp * 100 / 16 {{ ┌──────────────────────────────────────────────────────────────────────────────────────┐ │ TERMS OF USE: MIT License │ ├──────────────────────────────────────────────────────────────────────────────────────┤ │Permission is hereby granted, free of charge, to any person obtaining a copy of this │ │software and associated documentation files (the "Software"), to deal in the Software │ │without restriction, including without limitation the rights to use, copy, modify, │ │merge, publish, distribute, sublicense, and/or sell copies of the Software, and to │ │permit persons to whom the Software is furnished to do so, subject to the following │ │conditions: │ │ │ │ │ │The above copyright notice and this permission notice shall be included in all copies │ │or substantial portions of the Software. │ │ │ │ │THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, │ │INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A │ │PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT │ │HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION │ │OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │ │SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │ └──────────────────────────────────────────────────────────────────────────────────────┘ }}-Phil
Maybe you are right!
Would you suggest a good or excellent tutorial from which I can learn spin?
Discovery
Try this:
http://people.scs.carleton.ca/~lanthier/teaching/COMP4807/Notes/3 - SpinLanguageAndPropBotProgramming.pdf
-Phil
Okay Phil,
This looks good. Now I will go to school.
Discovery
Thank you very much. I am overwhelmed.
Sincerely,
Discovery
That's a really nice resource, Phil! Did you put that together for your students?
Paul
No, I just found it online.
-Phil
I hope someday soon we can see such a great resource such as this for P2.
Jim
Has anyone used a parasitic-powered EEPROM?
I want to read and eventually write to a DS24B33 that's embedded in a device.
The DS24B33 is a newer version of the DS2433, and I am guessing that the DS2431 and DS2432 are similar.