Thanks Kevin. I guess it really doesn't have to be an either-or thing. A mix of I2C and PyBBIO could be used as needed. I'm going to start by experimenting a little with I2C and then go from there.
On Thursday, September 5, 2013 5:05:55 AM UTC-4, red...@gmail.com wrote: > > Fiddling with the pins via the filesystem is where I started, but PyBBIO > mmaps the pins so you can flip them by reading/writing directly to > memory, and I "ported" that to clojure using > https://github.com/hiredman/beaglebone-jni-utils and > https://github.com/hiredman/blackbox/blob/master/src/blackbox/gpio.clj. > > I have not done anything with I2C, the last thing I did was work on > wiring the beaglebone to a mini arduino driving an ultrasonic range > finder. I used a java library, I think was called rxtx, for reading data > from the serial port. > > On 9/4/13 2:45 PM, Jeremy Wright wrote: > > Thanks for the slide deck Kevin. I'm not sure I've found all the slides > > yet, but it's great information. Do you have any links or information on > > Clojure robotics work you've done since the 2012 Conj? Any thoughts on > > using the GPIO pins through the file system versus using I2C (or maybe > SPI)? > > > > On Wednesday, September 4, 2013 3:59:33 PM UTC-4, red...@gmail.comwrote: > >> > >> I also have a vertigo inducing slide deck to go with the robot > lightening > >> talk (which I didn't end up using) > >> http://thelibraryofcongress.s3.amazonaws.com/conj2012-robot/index.html > >> > >> On Sunday, September 1, 2013 8:21:46 PM UTC-7, Jeremy Wright wrote: > >>> > >>> Here are some updates on my own research. > >>> > >>> 1. This post< > http://thelibraryofcongress.s3.amazonaws.com/beagleboneled.html>is a > little over a year old, but has the type of information on the > >>> BeagleBone I'm looking for. It covers doing some simple I/O using > Clojure. > >>> The author states that he's unsure what he's doing on the hardware > side of > >>> things, but it's a start. > >>> 2. This post< > http://nakkaya.com/2011/03/15/clojure-on-the-beagleboard/>says it's easy > to get Clojure working on the Beagleboard, but is a couple > >>> of years old and doesn't give too much detail. I do like that the > author > >>> does some benchmarking that could be adapted to the BeagleBone > Black though. > >>> 3. This post< > http://blog.gonzih.me/blog/2012/09/07/clojure-on-beaglebone-openjdk-vs-oracle-embedded-jre-benchmark/>is > > about a year old, and gives a benchmark comparison of OpenJDK vs > >>> Oracle's Embedded JRE on a BeagleBone. > >>> 4. Videos of Kevin Downey (less than a year old) showing a robot > >>> using Clojure on a BeagleBone. He gives some insight into how to > make using > >>> the Bone's I/O system in Clojure a little easier. > >>> 1. Video 1 of 3 <https://www.youtube.com/watch?v=XMIKfOmAMjQ> > >>> 2. Video 2 of 3 <https://www.youtube.com/watch?v=QPN2DFrlrYo> > >>> 3. Video 3 of 3 <https://www.youtube.com/watch?v=iQK9p0XV2IY> > >>> 5. Kevin Downey's Beaglebone robot code on Github< > https://github.com/hiredman/blackbox> > >>> . > >>> 6. Kevin Downey mentioned clojure-jna< > https://github.com/Chouser/clojure-jna> which > >>> should make working with native code (to do I/O) on the Bone a > little > >>> easier. The clojure-jna code on GitHub is about 4 years old though, > and I > >>> may have read something about a newer replacement on this mailing > list. I > >>> can't remember for sure though. > >>> > >>> That's what I've found so far. The information has some age on it and > is > >>> focused on the older BeagleBone and Beagleboard. It's good information > to > >>> get started with though I think. > >>> > >>> On Saturday, August 31, 2013 11:13:59 PM UTC-4, Jeremy Wright wrote: > >>>> > >>>> I recently watched Carin Meier's OSCON talk The Joy of Flying Robots > >>>> with Clojure <http://www.youtube.com/watch?v=Ty9QDqV-_Ak> and it > made > >>>> me wonder about Clojure on embedded systems. A quick search on this > list > >>>> didn't turn up much so I thought I'd ask. How much work has been done > with > >>>> Clojure on either Java friendly microcontroller systems (i.e. > Systronix<http://www.systronix.com/>), > >>>> or on something like a Beaglebone or Beagleboard? I'm very new to > Clojure, > >>>> so I don't yet understand the challenges that Clojure would face > trying to > >>>> run on a system that may not support all the JVM's features. > >>>> > >>>> Any thoughts on this? Any links you can give me on what's been/being > >>>> done? > >>>> > >>>> Thanks. > >>>> > >>> > > > > > -- > And what is good, Phaedrus, > And what is not good— > Need we ask anyone to tell us these things? > > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
