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by Velko
Tue Jul 31, 2012 7:52 pm
Forum: Bare metal, Assembly language
Topic: Virtual memory and linking
Replies: 21
Views: 7450

Re: Virtual memory and linking

Well, it makes perfect sense to me. I've been playing around with similar setup on both x86 and ARM (qemu-system-arm, haven't had time to try it on actual RasPi). All you need is slightly more sophisticated linker script. Something like this (you may notice that I prefer 3:1 userspace/kernel split):...
by Velko
Fri Jul 13, 2012 6:55 pm
Forum: General programming discussion
Topic: Source code licensing, forks, relicensing and copyrights
Replies: 2
Views: 1167

Source code licensing, forks, relicensing and copyrights

Hi, everybody! I have few uncertainties on how to proceed with source code licensing and copyright notices. What I did was, to take a look at somebody's MIT licensed code, took the basic idea and wrote my own version of it. Well, probably I also copy-pasted a few lines and then modified them to suit...
by Velko
Tue Apr 03, 2012 7:01 pm
Forum: General discussion
Topic: PCB and assembly
Replies: 23
Views: 5059

Re: PCB and assembly

<t>secretreeve said:<br/> <br/> <br/> Print the PCB you"ve created into matt photo paper using a LASER PRINTER (THIS WILL NOT WORK WITH INKJET)<br/> <br/> <br/> Actually there's free alternative to photo paper. Any glossy paper will do. I use advertisement pamphlets, that gets stuffed in my mailbox ...
by Velko
Fri Mar 09, 2012 8:15 pm
Forum: Staffroom, classroom and projects
Topic: ARM Assembly / Operating System
Replies: 48
Views: 16950

Re: ARM Assembly / Operating System

Great site on OS developement: http://www.osdev.org/

While it's somewhat x86-centric, you can find some pointers for ARM too (even a few bare-bones tutorials).
by Velko
Fri Feb 24, 2012 9:13 pm
Forum: Other projects
Topic: Bare metal Raspberry Pi
Replies: 23
Views: 6673

Re: Bare metal Raspberry Pi

<t>I'm afraid, it may be like trying to find a needle in a haystack. Personally, I feel lost every time, when looking at Linux source tree. And it may be a very long path from first instruction to actual "Hello world!" appearing on screen.<br/> <br/> It looks that making characters appear on screen ...
by Velko
Wed Feb 22, 2012 9:14 pm
Forum: Other projects
Topic: Stop Motion - PI to PC Key Presses?
Replies: 15
Views: 4408

Re: Stop Motion - PI to PC Key Presses?

<t>As for sending keypresses to a Windows application, it could be done purely in software. Just read up on Win32 API SendInput function. It's pretty straightforward to use (given that you know a bit how to write software for Windows).<br/> <br/> For controlling a stepper motor, R-Pi sure could do t...
by Velko
Mon Feb 20, 2012 11:01 pm
Forum: Other projects
Topic: Bare metal Raspberry Pi
Replies: 23
Views: 6673

Re: Bare metal Raspberry Pi

<r>snowyseal said: <br/> <br/> Bit here:<br/> <URL url="http://elinux.org/RPi_Software">http://elinux.org/RPi_Software</URL><br/> <br/> which says the GPU mounts the SD card, loads the GPU firmware, initialises hardware, then loads a kernel image. So, does it have to be a kernel image or could it ju...

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