Go to advanced search

by Johannes
Sat Feb 25, 2012 11:22 pm
Forum: General discussion
Topic: QR code
Replies: 8
Views: 1802

Re: QR code

I'm not going to mention RaspberryPi to anyone anymore until you open the shop and sell them. When the vapor has materialized into a computer in my mailbox, then I'll give it a go and if it lives up to the hype, I'll show it to others. Then - and not a minute earlier.
by Johannes
Fri Feb 24, 2012 10:04 pm
Forum: General discussion
Topic: Another week gone by...
Replies: 14
Views: 3778

Re: Another week gone by...

...without Raspberry Pi.

Sorry, I had to because it rhymes.
by Johannes
Wed Feb 22, 2012 10:01 am
Forum: General discussion
Topic: A question about timing
Replies: 32
Views: 11265

Re: A question about timing

<t>laszlo said: <br/> <br/> The linux system clock is not reliable for anything.  It has to be counting _something_ and on many machines there are no reliable clock sources.<br/> I don't know if the Raspberry Pi will have any type of 'constant' timer that is high precision.. so it may not be possibl...
by Johannes
Tue Feb 21, 2012 10:38 pm
Forum: General discussion
Topic: A question about timing
Replies: 32
Views: 11265

Re: A question about timing

<t>arm2 said: <br/> <br/> I can't see any reference to ARM FIQ on the GPIO "6.2 Alternative Function Assignments" in the datasheet! Did I miss it. Lots of references to the registers/software for ARM_FIQ but no mention of a physical connection!<br/> FIQ is not an I/O feature. FIQ is an interrupt lin...
by Johannes
Tue Feb 21, 2012 10:22 pm
Forum: General discussion
Topic: A question about timing
Replies: 32
Views: 11265

Re: A question about timing

<r>Caleb9849 said: <br/> <br/> drgeoff said: <br/> <br/> There are two aspects to the OP's question.<br/> <br/> 1.  The absolute accuracy.  That is if he wants things done at 50 Hz how close to 'standard atomic' time that does it need to be?  50.1 or 50.01 or 50.001 etc.  This really needs some refe...
by Johannes
Sat Dec 24, 2011 12:00 pm
Forum: General discussion
Topic: How come there are so many Raspberry Pi haters?
Replies: 99
Views: 24305

Re: How come there are so many Raspberry Pi haters?

<r>Geeks are problem seekers. If something is alright, it doesn\'t need to be worked on. That\'s why geeks find fault with everything. It\'s got nothing to do with hate.<br/> <br/> Related: <URL url="http://ars.userfriendly.org/cartoons/?id=20000702">http://ars.userfriendly.org/cartoons/?id=20000702...
by Johannes
Fri Dec 23, 2011 10:13 am
Forum: General discussion
Topic: What would your highest ebay bid be?
Replies: 7
Views: 1514

Re: What would your highest ebay bid be?

Allow me to quote the front page news: \"If all the boards from this batch perform well in testing, we’ll be auctioning ten of them off\"

10, not 100. I don\'t think you\'ll get one for £200.
by Johannes
Mon Dec 19, 2011 5:40 pm
Forum: General discussion
Topic: Raspberry Pi and Tor Project
Replies: 10
Views: 5955

Re: Raspberry Pi and Tor Project

<t>TOR is almost certainly going to get you in trouble. TOR is used for many nefarious purposes as well and that traffic will look like it\'s coming from you.<br/> <br/> University networks aren\'t the anything-goes networks of the 90s anymore. Look up your responsibilities and network restrictions ...
by Johannes
Sun Dec 18, 2011 2:03 pm
Forum: General discussion
Topic: if its good copy it?
Replies: 112
Views: 20414

Re: if its good copy it?

<r>Regarding \"components per dollar\" and design costs, I\'d like to offer a reality check and point out that $50 buys one of these, retail, including shipping:<br/> <URL url="http://www.amazon.com/ASRock-G41M-VS3-Core-Intel-Motherboard/dp/B002YVBEYE"><LINK_TEXT text="http://www.amazon.com/ASRock-G...
by Johannes
Sun Dec 18, 2011 12:42 am
Forum: General discussion
Topic: if its good copy it?
Replies: 112
Views: 20414

Re: if its good copy it?

<t>They \"knock\" the Raspberry Pi? I only see an estimated CPU speed comparison. The CPU isn\'t really the strong point of the Raspberry Pi, but that\'s no reason to be so touchy.<br/> <br/> I don\'t quite understand the hostility towards that project. Is it that they\'re going the \"made in China\...
by Johannes
Sat Dec 17, 2011 9:44 pm
Forum: General discussion
Topic: if its good copy it?
Replies: 112
Views: 20414

Re: if its good copy it?

<t>@kme, just like it is with the Raspberry Pi, their advertised budget isn\'t going to be all you\'ll pay. In case of the Raspberry Pi, you will at least need the power supply. In their case, you\'ll need at least one form of dock to plug the computer into (and a power supply). In a sense this is c...
by Johannes
Sat Dec 17, 2011 9:01 pm
Forum: General discussion
Topic: if its good copy it?
Replies: 112
Views: 20414

Re: if its good copy it?

<t>The design is different. They want to bring all interfaces out to just one high density connector. The SoC does all the work and provides all the interfaces. They\'ll need the SoC, RAM, flash memory, the PCMCIA connector, the board and birdseed. The SoC is allegedly available for $7 and already u...
by Johannes
Sat Dec 17, 2011 4:06 pm
Forum: General discussion
Topic: if its good copy it?
Replies: 112
Views: 20414

Re: if its good copy it?

<t>The proof of the pudding is in the eating. There have been too many open source hardware projects which never got beyond ambitious plans to get excited about another one, especially when it\'s a \"me too\" project. Right now even the Pi has yet to prove mass marketability at the target price, but...
by Johannes
Sun Dec 11, 2011 10:32 pm
Forum: General discussion
Topic: Availability Date
Replies: 16
Views: 2935

Re: Availability Date

<r>It\'s not going to be available before Christmas. The test boards are probably not even populated yet, let alone fully tested. I\'m sure they\'d let us know. There\'s no way 10000 ready-to-ship boards are going to be made in time for Christmas. Nothing ever gets done between Christmas and New Yea...
by Johannes
Sat Dec 10, 2011 6:04 pm
Forum: General discussion
Topic: UART for using Raspi without a screen
Replies: 48
Views: 10018

Re: UART for using Raspi without a screen

<r>[quote]<B><s>[b]</s>Quote from xkxx on December 10, 2011, 17:35<e>[/b]</e></B><br/> The USB to RS232 (uart) dongles are exactly what I\'m talking about and we have them already[/quote]<br/> <br/> If they are adapters with a 9-pin plug, like in the following picture, then they\'re not the right ki...
by Johannes
Sat Dec 10, 2011 5:52 pm
Forum: General discussion
Topic: UART for using Raspi without a screen
Replies: 48
Views: 10018

Re: UART for using Raspi without a screen

<r>Soldering is a skill worth learning. Don\'t be afraid, find a tech-minded teacher and ask for a quick tutorial and some supervision while you fix up your Raspberry Pis.<br/> <br/> The serial port on the Raspberry Pi is <B><s>[b]</s>not TTL level (5V)<e>[/b]</e></B>. Make sure that your serial ada...
by Johannes
Fri Nov 25, 2011 3:02 pm
Forum: General discussion
Topic: What have we missed?
Replies: 286
Views: 51391

Re: What have we missed?

<t>Quote from raubvogel on November 25, 2011, 14:31<br/> a less powerful machine (dockstar)<br/> <br/> The Dockstar is different, not necessarily less powerful. It has the same amount of RAM as the Model A Raspberry Pi, it has a less advanced CPU that runs at a higher clock speed. The integer perfor...
by Johannes
Fri Nov 11, 2011 11:39 pm
Forum: General discussion
Topic: Server
Replies: 28
Views: 6138

Re: Server

<r>[quote]<B><s>[b]</s>Quote from Jasont41 on November 11, 2011, 23:29<e>[/b]</e></B><br/> Will the raspi be strong enough to preform a ddos attack?<br/> [/quote]<br/> <br/> As the Raspberry Pi is just one machine, I don\'t see how you expect it to execute a <B><s>[b]</s>distributed<e>[/b]</e></B> d...
by Johannes
Tue Nov 08, 2011 11:22 pm
Forum: General discussion
Topic: Smallest Linux Install
Replies: 47
Views: 14256

Re: Smallest Linux Install

Check out Buildroot:
http://buildroot.uclibc.org/
by Johannes
Tue Nov 08, 2011 12:56 pm
Forum: General discussion
Topic: Will the Raspberry Pi use any non-free software?
Replies: 27
Views: 6900

Re: Will the Raspberry Pi use any non-free software?

<r>[quote]<B><s>[b]</s>Quote from asb on November 7, 2011, 23:16<e>[/b]</e></B><br/> Additionally, the ARM-side GLES/EGL/OpenVG implementation is closed source.[/quote]<br/> <br/> Would you mind citing a statement from the team about that? AFAIK the binary blob (\"the GPU firmware\") was supposed to...
by Johannes
Wed Nov 02, 2011 7:44 am
Forum: General discussion
Topic: Can a powered hub feed R-PI?
Replies: 46
Views: 6270

Re: Can a powered hub feed R-PI?

<r>[quote]<B><s>[b]</s>Quote from hippy on November 2, 2011, 01:16<e>[/b]</e></B><br/> The reverse voltage protection - presumed to be a crowbar diode or similar - has to be fitted on the circuit side of the fuse rather than the micro-USB side or it won\'t blow the fuse when wrong polarity is applie...
by Johannes
Tue Nov 01, 2011 9:55 pm
Forum: General discussion
Topic: Can a powered hub feed R-PI?
Replies: 46
Views: 6270

Re: Can a powered hub feed R-PI?

<t>Sorry for being a spoilsport, but sending power in through the downstream ports will render the protection circuits ineffective (no polarity protection, no overvoltage protection, no overcurrent protection), much the same as replacing the fuse with a much stronger one would. No risk, no fun, I gu...
by Johannes
Mon Oct 31, 2011 11:32 pm
Forum: General discussion
Topic: Doomed to use Powered Hubs
Replies: 66
Views: 10032

Re: Doomed to use Powered Hubs

<r>USB power is only limited by the fuse for the grand total current. Gert van-Loo explained in the \"Power supply news\" thread that \"the 5V coming in goes straight to the USB.\" The maximum allowed total current (which we don\'t know yet) is the only limit that the Raspberry can enforce via the f...
by Johannes
Mon Oct 31, 2011 4:24 pm
Forum: General discussion
Topic: Logo competition winner announced!
Replies: 19
Views: 3458

Re: Logo competition winner announced!

<t>About the favicon: Considering that Microsoft established the practice of putting a customizable icon there, the handling of favicons by Internet Explorer can be seen as the definitive way. This web site specifies a type of \"image/x-ico\", which isn\'t the official mime-type of Microsoft\'s icon...
by Johannes
Mon Oct 24, 2011 8:38 pm
Forum: General discussion
Topic: Power supply news!
Replies: 176
Views: 21989

Re: Power supply news!

<t>radix, no active component on the Raspberry Pi is involved in supplying 5V power to the USB devices. There\'s a fuse, but other than that it\'s straight from the PSU to the USB peripherals (like it is with most powered hubs too). Except for melting the traces if you really really overdo it, curre...

Go to advanced search