[PD] Sensors GPIO Raspberry Pi Pd

[Martin Peach]

Yes that would work too, if you can handle the soldering ;(
I suppose you could modify the c code to run two sensors and send the 
data to two different port numbers, or use two different selectors for 
the message. Another way would be to have the Pd patch request a reading 
from a specific sensor.
I'm trying to think how this could be generalized into a useful Pd 
external but it seems very specific to a particular setup.

Martin

On 2013-04-23 05:06, Julian Brooks wrote:
> Bit more digging re ic switch:
> My understanding is that if we got one of these:
> http://uk.farnell.com/roth-elektronik/re933-03/adaptor-smd-tssop-16-0-65mm/dp/1426182
> and one of these:
> http://uk.farnell.com/nxp/pca9546apw/ic-switch-4ch-i2c-16tssop/dp/2212120
> we should in theory be able to run both sensors off the same pins?
> BUT - would the current code you wrote function better/easier if the
> sensors were run from 2 separate sets of pins - ie how to parse the info
> from one patch sounds tricky and presume much simpler with 2
> [netreceive] objects attached to 2 C files?
>
> J
>
>
> On 23 April 2013 09:42, Julian Brooks <jbeezez at gmail.com
> <mailto:jbeezez at gmail.com>> wrote:
>
>     Hey Martin / all,
>
>     Omron tech support finally got back to me re the address issue, this
>     is what they had to say:
>
>     "D6T sensor can not change the address.
>     When you connect multiple sensors we recommend that you use the IC
>     switching.
>     Please refer to the below document.
>     http://media.digikey.com/pdf/Data%20Sheets/Omron%20PDFs/D6T44L_8L_Appl_Note.pdf
>     "
>
>
>     I've been through the spec sheet several times and don't see
>     anything (admittedly not sure exactly what I'm looking for though)
>     that relates to IC switching.
>
>     We've still got 2 of these doing nothing currently if they could be
>     brought into action:
>     http://adafruit.com/products/757
>
>     Or people on the RPi forum seem to have got the 2nd i2c pins going
>     but that seems to be for rev.2 boards only (I think - have posted a
>     question on the thread to ask).
>
>     Also asked tech support about the PEC errors but no response to that
>     one.
>
>     I've noticed that the PEC doesn't trigger errors all the time so am
>     wondering if it's possible to filter the errors out of the data
>     somehow in the C file?
>
>     Still delighted though - the sensors great!
>
>     Cheers,
>
>     Julian
>
>
>
>     On 22 April 2013 00:20, Julian Brooks <jbeezez at gmail.com
>     <mailto:jbeezez at gmail.com>> wrote:
>
>         Wonder if it's a difference between rev boards on the Pi?
>
>         I've also built a custom image based on Hexxeh's minimal install
>         which is working great for audio stuff.  My Pd patch that
>         wouldn't run without overclocking on a standard Raspian is now
>         working fine on the rev1 256mg board.  So I've been adding stuff
>         as and when it comes up to try and keep t is minimal as poss.
>
>         I'm also not sure what installed libi2c-dev?  Guess I'll have to
>         wait and see what squeals.
>
>         Of possible interest is this message when removing the lib with
>         apt-get:
>         The following packages will be REMOVED:
>            libi2c-dev
>         0 upgraded, 0 newly installed, 1 to remove and 11 not upgraded.
>         After this operation, 19.5 kB disk space will be freed.
>         Do you want to continue [Y/n]? y
>         (Reading database ... 33610 files and directories currently
>         installed.)
>         Removing libi2c-dev ...
>         Removing 'diversion of /usr/include/linux/i2c-dev.h to
>         /usr/include/linux/i2c-dev.h.kernel by libi2c-dev'
>
>         So guess the diversion was messing with the compile for the C code.
>
>         Anyway - code runs and I can compile C files too so all ok so far.
>
>         Thanks again for everything Martin,
>
>         Julian
>
>
>
>
>
>         On 21 April 2013 06:45, Martin Peach <martin.peach at sympatico.ca
>         <mailto:martin.peach at sympatico.ca>> wrote:
>
>             On 2013-04-20 21:09, Julian Brooks wrote:
>
>                 Oh and btw
>
>                 Still don't know why I can't compile the .c files on the
>                 pi with
>                 libi2c-dev installed but I can't.  Presuming the
>                 compiling is working
>                 for you Martin?
>
>
>             Yes it works for me. I don't have the same
>             /usr/include/linux/i2c-dev.h as you so no redefinition
>             errors, not sure which package(s) install that file.
>
>             Martin
>
>
>
>
>