libusb seems to be plain C, so it would make a nice use-case for uFFI http://www.libusb.org
There was an attempt at making a binding last year: https://www.mail-archive.com/pharo-users@lists.pharo.org/msg17312.html On 17 April 2016 at 12:15, Peter Uhnák <i.uh...@gmail.com> wrote: > This seems relevant: > > https://medium.com/concerning-pharo/pharo-pi-9eef257b6a21#.ay5v86peq > https://www.youtube.com/watch?v=sfxFqQIuawg > > Peter > > On Sun, Apr 17, 2016 at 9:52 AM, stepharo <steph...@free.fr> wrote: > >> First hello and welcome to Pharo. >> >> Second can you be clear about what you want to achieve? >> >> >> I have Squeak on a RPi but I don't know how to access any USB peripherals >>> or how to make primitives to do so. I want to use RPi for controlling a >>> microcontroller and processing webcam video for my robot. >>> >> That would be really nice. >> >>> If I can't get that in Smalltalk can it be added >>> >> I do not know RPi >> the system can be extended >> - adding a vm pluging (check the new blue book on my web page to >> get an idea) >> - doing an FFI call (now I do not know the status of the FFI on >> rasp) >> >> or what language should I move to? >>> >>> I was referred to >>> http://car.mines-douai.fr/category/software/pharos/ >>> but I can't get it to work on RPi. >>> >> What are the exact problems you face? >> Because this is a bit short. >> >>> >>> A major focus of RPi is to teach electronics but without access to the >>> peripherals, Smallltalk is not useful. But some access is available in >>> Scratch which is built on top of Squeak so why can't I get access to that >>> code directly instead of going through the Scratch changes file? >>> >> I do not know. May be this is just one pluging missing. >> Did you check Phratch? >> >> >> Why can't I get Smalltalk goodies like I used to buy from Digitalk? >>> >> You see: >> - the world got more complex we provide vm for OSX, iOS, Windows >> (different flavors), rasp, android, linux (different flavors), >> - second so far Pharo is free. Now you can help either by offering >> some time or putting money for a bounty on the table >> - third we are really busy making sure that Pharo 5.0 is on time and >> robust. >> >>> With all the VM work, there must be a way to hook up C++ code like >>> OpenCV to do real time video contours and other image recognition >>> algorithms. >>> >> Forget about C++ the binary is not standard. You have to wrap the C++ >> library into a C program and you could used (now it changed because >> we do not use nativeboost anymore). >> >> Dolphin has a somewhat easy way to add primitives. >>> >> Pharo too. >> >> You should read the uFFI draft documentation. Check the mail if was sent >> recently. >> >> >>> If Squeak all in one contains package bundles only for Mac, why not >>> include essentials for RPi? >>> >> >> >> >
