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by rpdom
Sun Jan 26, 2014 2:43 pm
Forum: Beginners
Topic: Issues with permissions on a flash drive
Replies: 12
Views: 2924

Re: Issues with permissions on a flash drive

FTrevor: Actually you can get away with creating any sort of filesystem on a partition and changing the fstab line to match it. The mount command doesn't really care what the partition type is set to. But it can get confusing, so you can go into fdisk and just change the partition type flag to Linux...
by rpdom
Sun Jan 26, 2014 1:24 pm
Forum: Troubleshooting
Topic: Pi not booting when connecting to GPIO via Ribbon Cable
Replies: 18
Views: 3209

Re: Pi not booting when connecting to GPIO via Ribbon Cable

Even with the pictures, I'm not convinced. It looks like you've got the end of the ribbon (female) plugged to a male PCB header. Please tell me I'm wrong, and that you have in fact got a male ribbon connector crimped directly to the ribbon. No, I think you are right from what I can see in those pic...
by rpdom
Sun Jan 26, 2014 8:26 am
Forum: Beginners
Topic: loading software onto the pi
Replies: 4
Views: 753

Re: loading software onto the pi

First rule of asking for help with errors: Post the exact command used and all of the messages. Some of them may not appear to be important, but might help with troubleshooting. The "timeout error connecting to 192.168.20.214:80" is puzzling. That would be the address of a computer or router on your...
by rpdom
Fri Jan 24, 2014 6:12 pm
Forum: Troubleshooting
Topic: No such file or directory.
Replies: 5
Views: 2473

Re: No such file or directory.

I think you have something very wrong in your sources.list on your Pi if it thinks it needs ubuntu versions of packages!

Have you accidentally added some Ubuntu repositories?
by rpdom
Fri Jan 24, 2014 5:06 pm
Forum: General discussion
Topic: what's installed on my pi
Replies: 5
Views: 1586

Re: what's installed on my pi

You could try pi@raspberrypi:~$ cat /etc/os-release PRETTY_NAME="Raspbian GNU/Linux 7 (wheezy)" NAME="Raspbian GNU/Linux" VERSION_ID="7" VERSION="7 (wheezy)" ID=raspbian ID_LIKE=debian ANSI_COLOR="1;31" HOME_URL="http://www.raspbian.org/" SUPPORT_URL="http://www.raspbian.org/RaspbianForums" BUG_REPO...
by rpdom
Fri Jan 24, 2014 4:58 pm
Forum: General discussion
Topic: Can I charge my raspberry pi via usb with 3 AA bateries?
Replies: 11
Views: 1736

Re: Can I charge my raspberry pi via usb with 3 AA bateries

Thanks so much! I just need a 3 hour duration. Do you think such a battery would be enouth to run a pi plus a câmera or shoul I use a ion littiun battery instead? A standardish PP3 type alkaline 9V battery has a power rating of around 550mAh. If you use a linear regulator like a 7805 then you will ...
by rpdom
Fri Jan 24, 2014 4:35 pm
Forum: General discussion
Topic: VGA to HDMI cable
Replies: 4
Views: 903

Re: VGA to HDMI cable

A plain HDMI to DVI-D cable will work without needing any converter, as long as you monitor has either a DVI-D or DVI-I input port. It will not work with a DVI-A port. DVI-A is essentially just a VGA connection with a different plug. DVI-D is a digital connection like HDMI. DVI-I has support for bot...
by rpdom
Fri Jan 24, 2014 8:48 am
Forum: Bare metal, Assembly language
Topic: SD Card Present Pin
Replies: 5
Views: 1475

Re: SD Card Present Pin

Just curious (and I haven't looked) but are you talking about the SD Card that the Pi actually boots from? In which case, don't things start to break when you pull the card out? It is the SD Card that the Pi actually boots from, and it depends on how you are using your Pi. In a lot of Bare Metal wo...
by rpdom
Fri Jan 24, 2014 8:29 am
Forum: Beginners
Topic: Problems with omxplayer after apt-get uprade
Replies: 6
Views: 1496

Re: Problems with omxplayer after apt-get uprade

OK, I'll try the latest one and see how that goes.

Thanks :)
by rpdom
Fri Jan 24, 2014 7:49 am
Forum: Bare metal, Assembly language
Topic: SD Card Present Pin
Replies: 5
Views: 1475

Re: SD Card Present Pin

From the way I read the Peripherals document, you need to set PUD to 0b10 to say "Pull Up", wait a short while, then toggle the right bit in the PUDCLKn register to enable it for that GPIO line, wait again, clear PUD, write 0 to PUDCLKn and the pull-up should be set. I need to try this myself! I've ...
by rpdom
Fri Jan 24, 2014 7:31 am
Forum: General discussion
Topic: Original 256Mb Pi - Collectors Item?
Replies: 16
Views: 2980

Re: Original 256Mb Pi - Collectors Item?

Sometimes old kit becomes a collectors item, and other times it becomes landfill (or recycled nowadays). I used to have a fairly rare ARM1 Second Processor unit for my BBC Micro. It was the larger 4MB (haha!) version and would have cost £4000 originally. I bought it second hand for about £20, eventu...
by rpdom
Fri Jan 24, 2014 7:21 am
Forum: Beginners
Topic: Problems with omxplayer after apt-get uprade
Replies: 6
Views: 1496

Re: Problems with omxplayer after apt-get uprade

I don't think it's the files. Ones that worked before are failing now. In my case I still think it is a problem with the files, even though they worked before. I suspect the frame sequence number (or whatever - I don't know much about MPEG2 formatting) isn't sequential and omxplayer used to ignore ...
by rpdom
Thu Jan 23, 2014 9:26 pm
Forum: Other projects
Topic: Reducing the RaspberryPi foot-print
Replies: 3
Views: 825

Re: Reducing the RaspberryPi foot-print

Some SD cards can be cut in half without affecting the performance. The chips inside are quite tiny. Try holding your card up to a strong light and see if you can see the edge of the internal circuit.

Then carefully cut long that line - if you are brave enough!
by rpdom
Thu Jan 23, 2014 8:37 pm
Forum: Beginners
Topic: Standardized "bit order" of header I/O lines
Replies: 20
Views: 2156

Re: Standardized "bit order" of header I/O lines

Hove wrote:Come on goats, let's go play in the meadows elsewhere...
But they are so much fun to knock off the bridge....

(How did you know I was a Capricorn anyway?)
by rpdom
Thu Jan 23, 2014 8:16 pm
Forum: Beginners
Topic: Problems with omxplayer after apt-get uprade
Replies: 6
Views: 1496

Re: Problems with omxplayer after apt-get uprade

I too have had problems with the latest versions of omxplayer too, but I suspect that is due to issues with the files I'm trying to play. Anyway, I reverted to a previous version (0.2.6) and it now works (although without all the extra features that the new version has). I don't have 0.2.4 still (we...
by rpdom
Thu Jan 23, 2014 7:26 pm
Forum: Beginners
Topic: Standardized "bit order" of header I/O lines
Replies: 20
Views: 2156

Re: Standardized "bit order" of header I/O lines

Sigh, you just don't get it, do you. The Pi is not an Arduino or PIC chip with predefined "standard" mappings for pins. They do what you want them to do. I use a range or peripherals. Some use standard pins like the DS18B20 and the one wire bus (ok, that is driven by software). Then there is I2C stu...
by rpdom
Thu Jan 23, 2014 6:08 pm
Forum: Beginners
Topic: Standardized "bit order" of header I/O lines
Replies: 20
Views: 2156

Re: Standardized "bit order" of header I/O lines

Because it applies to the very real examples I've contrived in this thread. "Contrived" is a very good word for it. As you have already been told. No. There is no agreed mapping because it doesn't apply to most real-life situations where you will use a Pi. The GPIO is not supposed to be used as a p...
by rpdom
Thu Jan 23, 2014 6:00 pm
Forum: Troubleshooting
Topic: Insserv Warning whenever installing anything
Replies: 3
Views: 663

Re: Insserv Warning whenever installing anything

I would ignore these warnings for now. I think they will get fixed eventually, but don't actually cause any problems. They are only warnings, not errors.
by rpdom
Thu Jan 23, 2014 5:56 pm
Forum: Troubleshooting
Topic: Red Light - Nothing Else
Replies: 6
Views: 1456

Re: Red Light - Nothing Else

C33 just seems to be a standard decoupling capacitor for the +5V supply to the USB sockets. It shouldn't affect the boot sequence. How do you think this capacitor became missing? Has the board been damaged in other ways? Have you tried pressing down on the SD card while booting? Have you inspected b...
by rpdom
Thu Jan 23, 2014 5:45 pm
Forum: Beginners
Topic: Standardized "bit order" of header I/O lines
Replies: 20
Views: 2156

Re: Standardized "bit order" of header I/O lines

The GPIO is not an 8-bit port. It is not connected to any 8-bit register. It is a collection of individual I/O lines from the available 54 internal connections, which are mapped to various bits on two 32 bit memory locations. Why must there be a "standard" mapping scheme for something that it doesn'...
by rpdom
Thu Jan 23, 2014 4:07 pm
Forum: Troubleshooting
Topic: sh:cant acces tty: job turned off
Replies: 2
Views: 621

Re: sh:cant acces tty: job turned off

It sounds like you have damaged something on the GPIO side and your Pi is booting into "safe mode". This should normally only happen if you ground pin 5 during power up (by connecting it to pin 6, for example). First you should check that you have nothing left connected to any GPIOs and try the boot...
by rpdom
Thu Jan 23, 2014 3:57 pm
Forum: General discussion
Topic: Can I charge my raspberry pi via usb with 3 AA bateries?
Replies: 11
Views: 1736

Re: Can I charge my raspberry pi via usb with 3 AA bateries

rangel96 wrote:And if I, by mistake, get the wrong polarities, will I damage the pi?
You will destroy your Pi if you do that.
by rpdom
Thu Jan 23, 2014 12:46 pm
Forum: Raspberry Pi OS
Topic: apt-get doesn't find any new updates
Replies: 2
Views: 3057

Re: apt-get doesn't find any new updates

I think you have set the Pin-Priority too low. From the man page of apt_preferences: " 0 < P < 100 causes a version to be installed only if there is no installed version of the package" So with both wheezy and jessie you have told it "don't upgrade from here" If you set wheezy to a priority between ...
by rpdom
Thu Jan 23, 2014 8:46 am
Forum: Networking and servers
Topic: 192.168.1.99/index.php works for my web server --but
Replies: 8
Views: 4697

Re: 192.168.1.99/index.php works for my web server --but

You don't really need a virtual host set up if you only have the one entry, or you want all hostnames to go to the same web pages. I don't see any DNS setup for either www.carloversjournal.com or carloversjournal.com. Has that been set up on an external DNS server somewhere, or are you currently jus...
by rpdom
Thu Jan 23, 2014 8:35 am
Forum: Other projects
Topic: Heat Sinking Case for XBMC on the Pi
Replies: 2
Views: 1389

Re: Heat Sinking Case for XBMC on the Pi

Looks pretty good. Nice and solid. But a bit pricey and, as has been noted, heatsinks are really not required. I'll stick with my £2.45 acrylic box, thanks, despite "a plastic, acrylic, or wood case actually work as an insulator damaging and shortening the life of your Raspberry Pi", which is not en...

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