It's been a long time, but I'm finally getting back to this idea. Starting from the ground up, I've written a blog post on getting Clojure up and running on the BeagleBone Black. In a future blog post I'll circle back around to this discussion, probably attempting to combine the concepts from Carin Meier's drone presentation with Kevin's PyBBIO Clojure port. I will probably leave I2C out of the mix for now.
http://innovationsts.com/?p=4779 Of course, any feedback on the blog post is appreciated. On Thursday, September 5, 2013 9:50:06 PM UTC-4, Jeremy Wright wrote: > > 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/d/optout.
