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by DexOS
Thu Jun 28, 2012 1:28 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

I don't have my Pi yet (hopefully soon). Just wanted to say great work so far on the "bare bones" approach, and I'm looking forward to being able to use this code! I'd like to be able to do some realtime stuff without too much extra overhead. Edit: the github stuff from dwelch67 is very informative...
by DexOS
Wed Jun 27, 2012 7:55 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Hi Dex - some people like me who are interested in robotics/automation just want to access the GPIO pins and are not bothered about mouse/keyboard/display/usb (although an I2C / SPI driver would be useful). Could this be easily achieved by adapting your demo using a binary compiled from c libraries...
by DexOS
Wed Jun 27, 2012 4:44 pm
Forum: Advanced users
Topic: Rapsberry without OS/as pure embedded device
Replies: 37
Views: 15251

Re: Rapsberry without OS/as pure embedded device

You can test my bare metal OS, see here: http://www.raspberrypi.org/phpBB3/viewtopic.php?p=108331#p108331 Its a port of my x86 OS called DexOS, its got a lot of function built in that can not be demoed yet, for lack of user input. I have got around the lack of usb support by the use of a simple pic ...
by DexOS
Wed Jun 27, 2012 1:59 pm
Forum: General programming discussion
Topic: Custom Build
Replies: 4
Views: 2192

Re: Custom Build

There are two modes of boot for the R-PI, depending what you set in the config.txt (or if you do not have a config.txt). One is it boots from offset 0, in that case you will need first32k.bin file (it just jumps to offset 0x8000). Two is its loaded and boots from 0x8000, in which case you do not nee...
by DexOS
Tue Jun 26, 2012 5:02 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

http://weblogimages.com/dajmando/SDHC%20Card%20Extender.jpg google 'sd slot extender' :) Thanks, As these look ideal, but i can not find a UK suppler. Found 1 or 2 on ebay (but not cheap at £10+) http://www.ebay.co.uk/itm/SD-card-extension-Cable-/110903317130?pt=UK_Photography_MemoryCardReaders_RL&...
by DexOS
Tue Jun 26, 2012 2:09 am
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

I wouldn't bother with the "encryption" stage next time. If someone can be bothered to fold your binary into something that can be disassembled, anything you can do is broken before you bother to start It took me 2 minutes, but that's largely because I'm typing on a french keyboard but using an eng...
by DexOS
Mon Jun 25, 2012 8:02 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Did as you said and got what you described - it set the display mode, correctly displayed an image on my Sharp 1024 x 768 monitor, printed to the screen (via an HDMI - > DVI adapter) and turned the led on/off. It booted in the blink of an eye and worked first time - my testing is successfully compl...
by DexOS
Mon Jun 25, 2012 2:26 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Here is the files if anyone wants to test http://www.dex-os.com/DexOS_R_PI/DexOS_R_PI.zip To test, just format a SD card to fat32 and add all the files in the "Put on SD card" folder, that's in the zip file. Then just startup your raspberry pi with the SD card in. Simple ;) . Note: i have only teste...
by DexOS
Fri Jun 22, 2012 1:07 pm
Forum: Other projects
Topic: Any work on Real Time Operating systems.
Replies: 4
Views: 3958

Re: Any work on Real Time Operating systems.

DexOS is a real time OS and is being ported to the R-PI
http://www.raspberrypi.org/phpBB3/viewt ... =31&t=7004
by DexOS
Fri Jun 22, 2012 12:59 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Cool - can Joe Public get this? If you mean, can Joe Public download a kernel.img and config.txt to test it sure, if anyone wants to test it, i can upload it to my site (read below). But as it does nothing much yet, other than set display mode, display image and print to screen and turn led on/off....
by DexOS
Wed Jun 20, 2012 1:27 am
Forum: HATs and other add-ons
Topic: Simple GPIO testing board
Replies: 64
Views: 11517

Re: Simple GPIO testing board

sg84 wrote:
DexOS wrote:Its seems knowledge counts for nothing these days
Seems manners don't count for much either...
Manners are for people with too much time on there hands, like people that rejoin a forum just to post the above.
by DexOS
Tue Jun 19, 2012 1:51 pm
Forum: HATs and other add-ons
Topic: Simple GPIO testing board
Replies: 64
Views: 11517

Re: Simple GPIO testing board

I have a problem with your video being posted on the main news page of the raspberry pi site. Its seems knowledge counts for nothing these days, if you can present in a professional way, then what you post must be right. I see it time and time again, people who can write flowing articles about topic...
by DexOS
Sun Jun 17, 2012 6:37 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Just a screenshot of DexOS working with Hdmi, plus my new R PI setup.

Image

Image
by DexOS
Sat Jun 16, 2012 2:30 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

On the Pi, the kernel HAS to be on the SD card - once it's got started it can then look for the rest of the files where ever you tell it to, if it has the code and drivers to do so. There two choses for this, write code to read/write SD card (not too hard) or as a temple measure, stick a floppy.img...
by DexOS
Sat Jun 16, 2012 2:19 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

toxibunny wrote:Image

google 'sd slot extender' :)
Thanks, As these look ideal, but i can not find a UK suppler.
by DexOS
Fri Jun 15, 2012 5:20 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

With the uSD cadpater (Kingston) I have here, its pretty easy to get teh uSD in and out without disconnecting the SD adapter. Thanks jamesh, i will try one of those, it would be much easier and neater. Yes i can confirm it works great, just got a 2GB KINGSTON (Class 2), i can get the micro sd in an...
by DexOS
Fri Jun 15, 2012 4:16 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

jamesh wrote: With the uSD cadpater (Kingston) I have here, its pretty easy to get teh uSD in and out without disconnecting the SD adapter.
Thanks jamesh, i will try one of those, it would be much easier and neater.
by DexOS
Fri Jun 15, 2012 4:12 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Is there a way to wire up a reset so that I/we dont have to yank the usb to power cycle. I could come up with a switch on a power strip with a usb wall wart thing, but would rather have something on or near the board... I found a great way to power the PI on/off without yanking the plug out (i am u...
by DexOS
Fri Jun 15, 2012 3:57 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

@Dex Excellent work on the framebuffer access! Looking forward to the hdmi secrets. I have a question however: isn't the register at offset 0x20 the write register for mailbox 1 (from owner 0), and nothing to do with mailbox 0 (the definition of ARM_0_MAIL1_WRT in arch/arm/mach-bcm2708/include/mach...
by DexOS
Thu Jun 14, 2012 9:48 pm
Forum: Other projects
Topic: LambdaPi
Replies: 9
Views: 4376

Re: LambdaPi

With this commit , I have a multitasking os protocore up on Pi hardware. Pretty much all it does for the moment is blink the LED, but it's doing it in a multitasking way. It's taken me 2 nights to realise that the reason I wasn't getting my interrupts was because I'd cutandpasterised the IRQ regist...
by DexOS
Thu Jun 14, 2012 7:41 pm
Forum: C/C++
Topic: - Help - Programming a simple OS
Replies: 28
Views: 9557

Re: - Help - Programming a simple OS

DexOS: Which takes so much time? The writing of the OS or designing it? Yeah I'm on the same lines. The key is in understanding why you're designing an OS. I consistently keep using the software I'm writing. As a result all the whistles are missing. For me it was i want a OS of a certain design and...
by DexOS
Thu Jun 14, 2012 6:52 pm
Forum: C/C++
Topic: - Help - Programming a simple OS
Replies: 28
Views: 9557

Re: - Help - Programming a simple OS

Just trying to install some realism/pragmatism via the joke/sarcasm route! (although that 73k value was from the BBC report - nothing jokey about that - that's a lot of man years) Making a OS is fine, as long as you do not try to code a "all bells and whistles" desktop OS. I have told many OSDev be...
by DexOS
Thu Jun 14, 2012 6:02 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

I am thinking about making a board with a sd slot at one end and the other end to match a sd card, so that will stay in the R-PI and the slot i added, will take the wear. It's called a micro SD adapter... if those work yet; there was a problem with them but there have been firmware updates since th...
by DexOS
Wed Jun 13, 2012 9:53 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Thanks dwelch67, i have ordered the parts that you suggested (FTDI Basic Breakout - 3.3v) to use Uart, than i can try you "serial bootloader" once its working. I have the same worries as you with the SD card slot. I am thinking about making a board with a sd slot at one end and the other end to matc...
by DexOS
Wed Jun 13, 2012 6:29 pm
Forum: General programming discussion
Topic: Got bare bones graphics working
Replies: 58
Views: 36103

Re: Got bare bones graphics working

Good news for R-PI OSDev's, i have got the hdmi working, so much better graphics :D

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