Go to advanced search

by johnbeetem
Thu Apr 11, 2013 12:01 am
Forum: General discussion
Topic: Windows 3.1/95
Replies: 49
Views: 6321

Re: Windows 3.1/95

If you Brits are so smart, why is the system we sometimes use in the U.S. (other than for scientific endeavo(u)rs) called the "English" system (based upon the anatomy of your celebrities from Days of Yore)? Hmmmm? :lol: Its you lot that call it "the "English" system", we would call it British, I gu...
by johnbeetem
Wed Apr 10, 2013 10:30 pm
Forum: General discussion
Topic: Windows 3.1/95
Replies: 49
Views: 6321

Re: Windows 3.1/95

Oui, je suis américain (from "The Coast") Yes, but which coast? Unless you mean Hawaii which seems to be all coast and nothing else? Is this an Americanism that the rest of us aren't au fait with? I've often wondered why we split numbers into triples of digits, and why SI abreviations also go in po...
by johnbeetem
Wed Apr 10, 2013 6:20 pm
Forum: General discussion
Topic: Windows 3.1/95
Replies: 49
Views: 6321

Re: Windows 3.1/95

And I always write kilo with a capital K. That's how I learned it back in 1967 when all positive powers of ten were capitalized (D = deca) and all negative powers of ten were lower case (d = deci). Nice convention. So even when you (as in Americans, I assume you are from the US?), for once, use the...
by johnbeetem
Tue Apr 09, 2013 5:28 pm
Forum: General discussion
Topic: Windows 3.1/95
Replies: 49
Views: 6321

Re: Windows 3.1/95

Back off topic: When I bought MS VC++ 1.0 in 1993, it came on fourteen 1440KiB 3.5" floppies. There was a coupon in the box to fill in if you required 5.25" media, bizarrely still formatted for the obsolete 360KiB drives. I sent that off expecting to get around sixty free discs, but sadly Microsoft...
by johnbeetem
Tue Apr 09, 2013 2:44 am
Forum: Off topic discussion
Topic: Windows 7 will randomly reboot and wont shut down
Replies: 13
Views: 2603

Re: Windows 7 will randomly reboot and wont shut down

Here's my experience: Windows doesn't like the Internet. As long as I never connect my Windows machines to the Internet they seem to work fine.
by johnbeetem
Mon Apr 08, 2013 8:48 pm
Forum: Troubleshooting
Topic: Red dots in screen with raspbmc
Replies: 11
Views: 6155

Re: Red dots in screen with raspbmc

I had a similar problem (in my case green dots) when I had an iffy power supply. With TP1-TP2 at 4.65V or higher, everything was fine. Lower than that, when I did something compute-intensive like compiling the green dots would appear and then go away when the compile was complete. Nice "feature", ex...
by johnbeetem
Mon Apr 08, 2013 8:34 pm
Forum: Off topic discussion
Topic: Cubieboard vs RaspberryPi B
Replies: 73
Views: 53684

Re: Cubieboard vs RaspberryPi B

Has anyone else managed to get a tenth as many general purpose small, cheap single board systems on the market? I certainly don't know of any. For that alone the Foundations deserves notice and accolades. I believe BeagleBoards have sold approx 100K, which meets your one-tenth. Granted it took them...
by johnbeetem
Mon Apr 08, 2013 5:34 pm
Forum: General discussion
Topic: Atrix lapdock
Replies: 1
Views: 988

Re: Atrix lapdock

Sounds like you either have a bad USB cable+adapter between RasPi and Lapdock or it's not hooked up the right way. The USB cable+adapter needs to go from one of the RasPi full-size USB A ports to Lapdock's Micro USB plug. If you have a rev 2.0 RasPi (with mounting/alignment holes) you can power RasP...
by johnbeetem
Sun Apr 07, 2013 7:18 pm
Forum: Beginners
Topic: No HDMI with a twist (solved)
Replies: 3
Views: 605

Re: No HDMI with a twist

HDMI-to-VGA converters often require manual configuration in "config.txt". There are some sample configurations for various converters at the RasPi Hardware Wiki: http://elinux.org/RPi_VerifiedPeriphera ... rter_boxes
by johnbeetem
Fri Apr 05, 2013 6:51 pm
Forum: General discussion
Topic: Why python ?
Replies: 8
Views: 1493

Re: Why python ?

Of all the stuff I've seen in three decades of programming, using semantic whitespace in a post punched card world is the daftest. Personally, I rather like Occam's use of indentation to specify block structure and I agree with rurwin's comments. My vote for Daftest Programming Construct is the C b...
by johnbeetem
Wed Apr 03, 2013 10:08 pm
Forum: Raspbian
Topic: im going to cry (solved)
Replies: 13
Views: 1544

Re: im going to cry

every time i put a fresh copy of Raspbian on the sd card all works fine untill i reboot says sulogin account locked error code 2 something thing to do with fsck! any one know how to fix it driving me mad ive updated, upgraded power is ok tryed with diffrent keyboards ,mouse still does that every ti...
by johnbeetem
Sun Mar 31, 2013 8:50 pm
Forum: Other projects
Topic: HDMI to VGA adapter - Draws too much power?
Replies: 9
Views: 12066

Re: HDMI to VGA adapter - Draws too much power?

I just want to know if it's safe to continue to use the adapter. My "no warranty expressed or implied" opinion is "probably". It depends on how "safe" you want to be. It's unlikely that the adapter will damage any of the RasPi ICs, since they use 3.3V so as long as RasPi's main 5V line (connected t...
by johnbeetem
Sun Mar 31, 2013 8:27 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO out pin current and voltage
Replies: 5
Views: 10685

Re: GPIO out pin current and voltage

Hello, sorry if i created this topic in wrong place I'm controlling transistors from GPIO out pin ( not 3v3 ) and it works fine but i need to know how much voltage HIGH signal is and what is maximum current that it can provide. Details on GPIOs are at the RasPi Hardware Wiki: http://elinux.org/RPi_...
by johnbeetem
Sun Mar 31, 2013 3:55 am
Forum: Other projects
Topic: HDMI to VGA adapter - Draws too much power?
Replies: 9
Views: 12066

Re: HDMI to VGA adapter - Draws too much power?

There's a lot of information about power supply problems at the RasPi Troubleshooting Wiki: http://elinux.org/R-Pi_Troubleshooting#Troubleshooting_power_problems There are three voltage drops to consider: 1. The power supply itself (a good power supply should be able to produce a full 5V up to its r...
by johnbeetem
Sat Mar 30, 2013 9:39 pm
Forum: General discussion
Topic: Turning GPIO ports on or off
Replies: 2
Views: 531

Re: Turning GPIO ports on or off

The RasPi Hardware Wiki has a great page on GPIOs and how to program them in various languages. Here's the Python section: http://elinux.org/RPi_Low-level_peripherals#Python
by johnbeetem
Sat Mar 30, 2013 1:20 pm
Forum: General discussion
Topic: Help With creating a rpi-based laptop
Replies: 5
Views: 2398

Re: Help With creating a rpi-based laptop

If you have to ask, you don't have the skills and knowledge needed to tackle this highly-advanced project. To give you an idea of how much effort it takes, no one else has done this with any arbitrary laptop-style display yet, either, not even the engineers at the Pi Foundation. They've made noises...
by johnbeetem
Fri Mar 29, 2013 9:02 pm
Forum: General programming discussion
Topic: ARM is the same as ARM?
Replies: 8
Views: 1686

Re: ARM is the same as ARM?

Many thanks, this helped me getting on the right track (using -march and -mcpu). Do you have any hint on how to get objcopy and ld to create a binary without the libc inside? -nostartfiles gets me a bundle of linker errors. I've never used "objcopy", but when cross-compiling I have used "ld" to gen...
by johnbeetem
Fri Mar 29, 2013 8:48 pm
Forum: General discussion
Topic: Pi Face OC outputs
Replies: 2
Views: 871

Re: Pi Face OC outputs

Here's what the RasPi Hardware Wiki says: http://elinux.org/RPi_Low-level_peripherals#Power_pins Maximum permitted current draw from the 5 V pin is the USB input current (usually 1 A) minus any current draw from the rest of the board. Model A: 1000 mA - 500 mA -> max current draw: 500 mA Model B: 10...
by johnbeetem
Fri Mar 29, 2013 8:33 pm
Forum: Troubleshooting
Topic: Always losing HDMI signal..
Replies: 11
Views: 2273

Re: Always losing HDMI signal..

Thanks for your reply. I don't have another hdmi cable atm so I can't try but I use this cable si I know it's working. I've tried to add these options but no change. I'm sure it's not crashing because I can ssh to it. And for the power it's a 5v charger from my samsung phone. I don't have the tools...
by johnbeetem
Fri Mar 29, 2013 8:26 pm
Forum: General programming discussion
Topic: ARM is the same as ARM?
Replies: 8
Views: 1686

Re: ARM is the same as ARM?

You should be able to use RasPi's "gcc" for ARM7TDMI by selecting different architecture options. See the "ARM Options" section of the GCC manual for the appropriate "-m" machine options. ARM7TDMI is actually an ARMv4T architecture, not ARMv7. Yes, it's confusing. There's a nice table at: http://en....
by johnbeetem
Fri Mar 29, 2013 8:06 pm
Forum: HATs and other add-ons
Topic: CPLD board for Raspberry Pi
Replies: 6
Views: 1853

Re: CPLD board for Raspberry Pi

Nice review! Thanks for the link. I had read about the Guzunty Pi a while back, and I really like the XC9572XL. I've used it in a number of real products -- it has a very nice balance of resources. Ah, if only Xilinx would release the bit format so we could have FLOSS tools... Speaking of tools, I r...
by johnbeetem
Fri Mar 29, 2013 7:33 pm
Forum: HATs and other add-ons
Topic: Dump question: Where is GND?
Replies: 6
Views: 3753

Re: Dump question: Where is GND?

There's a good section on GPIO pinout and programming GPIOs at the RasPi Hardware Wiki: http://elinux.org/RPi_Low-level_peripherals Be very careful with the 5 V pins P1-02 and P1-04, because if you short 5 V to any other P1 pin you may permanently damage your RasPi. Before probing P1, it's a good id...
by johnbeetem
Wed Mar 27, 2013 7:33 pm
Forum: General discussion
Topic: I made a Raspberry PI Laptop
Replies: 840
Views: 377469

Re: 2 issues w/Bionic Lapdock

As for the keyboard issue, that's simple, too - the Raspberry Pi defaults to a UK layout, and, as with any computer, it isn't aware of what's printed on the keys. This thread should hopefully see you right, as far as sorting that out. :) You can also read about the keyboard issue at the RasPi Troub...
by johnbeetem
Wed Mar 27, 2013 7:29 pm
Forum: General discussion
Topic: I made a Raspberry PI Laptop
Replies: 840
Views: 377469

Re: I made a Raspberry PI Laptop

So I think I may have f***ed up on my atrix lapdock. I cut the micro-USB cable from the lapdock's side. I was hoping to solder up a longer usb cable to it, but the colors are all wrong. That, and the tiny wires. Can anyone help? I need to know what colors on the lapdock cable match up to what color...

Go to advanced search