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by markokrajnc
Mon Feb 08, 2016 8:17 pm
Forum: Bare metal, Assembly language
Topic: Ultibo core a bare metal environment for Raspberry Pi
Replies: 65
Views: 22838

Re: Ultibo core a bare metal environment for Raspberry Pi

...although I still have my doubts, especially about how "Multicore support on Raspberry Pi 2B with all cores sharing workload" and "Thread priority, affinity and migration support" , and claims like "Ultibo core is a unikernel or kernel in an RTL " are compatible with not being an OS. but I digres...
by markokrajnc
Wed Apr 29, 2015 11:11 am
Forum: Bare metal, Assembly language
Topic: How fast a Raspberry Pi can boot?
Replies: 21
Views: 12486

Re: How fast a Raspberry Pi can boot?

We can of course discuss what boot ime is, but I believe most people mean that it is something visible. Like desktop or login prompt or sshd deamon ready to accept connections. When I measured the boot times, the characters send from RPi over UART01 serial port were visible on my desktop PC... The ...
by markokrajnc
Tue Sep 09, 2014 4:35 pm
Forum: Bare metal, Assembly language
Topic: How fast a Raspberry Pi can boot?
Replies: 21
Views: 12486

Re: How fast a Raspberry Pi can boot?

Those boot times are incredible! What is the functionality of these minimal loads once booted? Have you done any tests to measure the time to take an image from the camera? Configuration A (Herman H Hermitage uart01 second stage bootloader) does nothing more, than: - initializing UART01 serial port...
by markokrajnc
Thu Sep 04, 2014 11:09 am
Forum: Bare metal, Assembly language
Topic: How fast a Raspberry Pi can boot?
Replies: 21
Views: 12486

Re: How fast a Raspberry Pi can boot?

Ideally I would like to have a bootcode.bin source code (in GPU assembler or C) which does the following: - RAM initialization (including split between ARM/GPU) - ARM CPU initialization (including CPU frequency) - loading of kernel.img - starting kernel.img code Nothing more (no graphics or minimal ...
by markokrajnc
Wed Sep 03, 2014 9:19 am
Forum: Bare metal, Assembly language
Topic: How fast a Raspberry Pi can boot?
Replies: 21
Views: 12486

Re: How fast a Raspberry Pi can boot?

Hello mimi123! Is freeblob just a "Hello World" in C for GPU or is it a complete bootloader? What I would expect from a "complete bootloader": - RAM initialization (including split between ARM/GPU) - ARM CPU initialization (including CPU frequency) - loading of kernel.img - starting kernel.img code ...
by markokrajnc
Sun Aug 17, 2014 2:12 pm
Forum: Bare metal, Assembly language
Topic: How fast a Raspberry Pi can boot?
Replies: 21
Views: 12486

How fast a Raspberry Pi can boot?

Hello! Today I measured boot loader times in different configurations. Because this may be interested to somebody else I am posting my results here... The idea behind this test is to write bare metal programs for Internet of Things which can boot very fast and can be used in different cases - for ex...
by markokrajnc
Sun Apr 27, 2014 11:51 am
Forum: General discussion
Topic: RaspBerry Pi(e) Model C (imaginations & wants)
Replies: 431
Views: 152903

Re: RaspBerry Pi(e) Model C (imaginations & wants)

If (or when) new Raspberry Pi models will be planned I would like the design team to consider these points: - It would be much better to have the MicroUSB connector on the same side as USB and Ethernet connectors. In this arrangement in most cases users will have all cables on one side which is much...
by markokrajnc
Tue Dec 31, 2013 12:35 pm
Forum: Java
Topic: Oracle license fees for Java on Raspberry Pi are cheap
Replies: 34
Views: 15695

Re: Oracle license fees for Java on Raspberry Pi are cheap

Hove wrote:You pay once a quarter for the RPi you sold during that quarter using the Java. So you pay 60c once per RPi sold.
Thank you for clarification!
by markokrajnc
Thu Dec 26, 2013 7:57 am
Forum: Java
Topic: Oracle license fees for Java on Raspberry Pi are cheap
Replies: 34
Views: 15695

Re: Oracle license fees for Java on Raspberry Pi are cheap

Hello!

I need clarification of the following sentence:
60 cents (US) per Pi, payable by check quarterly
Does this mean I need to pay 0.60 USD per Pi every quarter (every 3 months)? Or does it mean something else?

Thank you for your clarification!

Sincerely,
Marko Krajnc
by markokrajnc
Mon Sep 09, 2013 10:21 am
Forum: General discussion
Topic: NSA spying and Raspberry Pi
Replies: 56
Views: 16428

Re: NSA spying and Raspberry Pi

dave j wrote:Storing data on paper can have it's own problems.
I didn't mean using printers to print on paper... I meant using pencil to write on paper...

For example my To-Do list or my personal calendar by using Moleskine instead of Google Apps or Microsoft Outlook...
by markokrajnc
Sun Sep 08, 2013 8:55 pm
Forum: General discussion
Topic: NSA spying and Raspberry Pi
Replies: 56
Views: 16428

Re: NSA spying and Raspberry Pi

Putting backdoors into the Pi or any other computer would be difficult if not impossible with such a variety of different hardware and not to mention the fact you still need someway of communicating with them. They have enough transistors in the Raspi Soc to put a backdoor in the hardware. Then aga...

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