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by bleep42
Mon Mar 14, 2016 3:37 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

Got ya! It's was the disconnecting of the current power that I was missing! So... The red wire is now powering the board via the VR (soldered underneath, back to the power connection). The black wire is grounding to the ground point shown in the photo just above. The grey wires are powering the Pi ...
by bleep42
Mon Mar 14, 2016 3:14 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

Hi Just wanted to give kudos for your project. I've been designing something similar for the last few weeks which is how I came across your project. One thing I'm not sure about if you don't mind. As you said, the board has a 5V output solder point but I can't work out how the wiring with the volta...
by bleep42
Thu Oct 29, 2015 11:12 am
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

Looking from the front of the board, ie the side with all the monitor connectors and power connectors on it; on the left hand side of the board behind the connector that goes to the LCD labelled 'CN5 INVERTER', there are 6 vacant pin holes in a line, labelled CN3. These are, from front to back Powe...
by bleep42
Wed Aug 19, 2015 10:15 am
Forum: Beginners
Topic: Do not switch to HDMI on startup
Replies: 13
Views: 23958

Re: Do not switch to HDMI on startup

hdmi_ignore_cec_init=1 but as i said before, because of using NOOBS, i have to put that option to the OpebELEC (in your case it is RaspBMC) config.txt AND NOOBS config.txt Hi Beta-Tester, Could you give me the paths of where the two config.txt files go, as I only know of one? Thanks Kevin.
by bleep42
Thu Jun 25, 2015 12:54 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Move the filesystem to a USB stick/Drive
Replies: 339
Views: 517880

Re: HOWTO: Move the filesystem to a USB stick/Drive

Mine simply says. root=/dev/sda1 The flaw with that is that your HDD MUST enumerate as /dev/sda (with partitions /dev/sda1 to /dev/sdaN). What happens when it enumerates as /dev/sdb? Yes possible, but it never does! and I've been using /root on a external disk since well before this thread was star...
by bleep42
Thu Jun 25, 2015 12:24 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Move the filesystem to a USB stick/Drive
Replies: 339
Views: 517880

Re: HOWTO: Move the filesystem to a USB stick/Drive

yy502 wrote:Hi all,

Could someone who boots their Pi from USB disk confirm if I need to change root=PARTUUID=xxx (existing working solution) to root=UUID=yyy in cmdline.txt when I upgrade from 3.18 to 4.0?

Thanks.
Mine simply says.

Code: Select all

root=/dev/sda1
by bleep42
Fri Jun 19, 2015 3:26 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

Just a quick question about the M.NT68676.2A. When you apply power to it does it automatically power on or does it require you to push the on/off button? Reason I am asking as I was considering using one for a car PC installation and would want to do away with the button board completely once set u...
by bleep42
Mon Feb 09, 2015 9:05 am
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 111003

Re: C compiler options for Pi2

Hi, can anyone recommend the best C compiler options for the Pi2; on my pi B+ i use 'cc -O2 xyz.c' I'm after best performance rather than code size. Thanks Kevin. Build a Makefile for your project and you can run make -j 6 to get the compiler running in parallel on all four CPUs. I suspect bleep42 ...
by bleep42
Sun Feb 08, 2015 5:59 pm
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 111003

C compiler options for Pi2

Hi, can anyone recommend the best C compiler options for the Pi2; on my pi B+ i use 'cc -O2 xyz.c' I'm after best performance rather than code size.
Thanks Kevin.
by bleep42
Thu Jan 15, 2015 6:37 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

thanks Kevin, i was looking for something small in factor and the battery you suggest looks perfect. i only need to check the quoted capacity like you said. i thought that it would just be a parallel circuit with the battery and the power input cause i want to make it like a regular UPS. when i don...
by bleep42
Mon Jan 12, 2015 5:27 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

Thanks Kevin. My controller board is the same as yours. i'll have it tomorrow. i will need to search for a DC power source at a electronic store, cause i didn't ordered one bundled with the controller board. Your post helped me a lot. which battery are you thinking of using for your case? i was thi...
by bleep42
Fri Jan 09, 2015 8:21 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

do i need the voltage regulator you used also? Hi Roberto, If your screen driver is the same as mine, it needs 12V DC, but it will work down to 7V DC, I used the regulator so I could use any DC power source from 12V up to 40V DC, I'm also intending to put a battery inside the case, which would need...
by bleep42
Thu Jan 08, 2015 8:49 pm
Forum: Advanced users
Topic: Thermal Specs
Replies: 7
Views: 1065

Re: Thermal Specs

You probably want to talk to these people.
http://www.raspberrypi.org/penguin-lifelines/
They have been using them @ - 42C and below in the Antarctic. Good luck.
Kevin.
by bleep42
Tue Sep 16, 2014 3:31 pm
Forum: Troubleshooting
Topic: EXT4 USB Disk journal corruption
Replies: 20
Views: 3849

Re: EXT4 USB Disk journal corruption

'skipping any contents from this failed directory' is a generic rsync error, not necessarily indicating disk problems. If the disk mounts and behaves perfectly under Raspbian 06-20 then at least the disk is fine. I would go back to the earlier Raspbian, or wait for an update to fix the 09-09 bug, o...
by bleep42
Mon Sep 15, 2014 4:06 pm
Forum: Troubleshooting
Topic: EXT4 USB Disk journal corruption
Replies: 20
Views: 3849

Re: EXT4 USB Disk journal corruption

I've done a bit more checking. If I boot the most recent Raspbian 09-09 normally off of SD card from a fresh install, login to the command prompt, plug in the USB disk, which I have already formatted EXT4 on another machine and it's working happily on that machine. I then mount it 'sudo mount /dev/s...
by bleep42
Mon Sep 15, 2014 3:36 pm
Forum: Troubleshooting
Topic: EXT4 USB Disk journal corruption
Replies: 20
Views: 3849

Re: EXT4 USB Disk journal corruption

Kevin Yes I know all that. It is just a bit confusing to say "format" when you mean "create a file system". I don't say your disk is duff - it is reasonably unlikely. You say the rsync threw loads of disk errors, exactly what error messages were they ? Jim Hi Jim 'skipping any contents from this fa...
by bleep42
Mon Sep 15, 2014 2:16 pm
Forum: Troubleshooting
Topic: EXT4 USB Disk journal corruption
Replies: 20
Views: 3849

Re: EXT4 USB Disk journal corruption

With this command: sudo fdisk /dev/sda did you attempt to format the wrong disk ? Was /dev/sda actually the SD card from which Raspbian was running ? Did you intend to type sudo fdisk /dev/sdb ? No; as far as I know you can't fdisk a mounted disk. In my original post I realise I had already formatt...
by bleep42
Mon Sep 15, 2014 10:43 am
Forum: Raspbian
Topic: EXT4 USB Disk journal corruption
Replies: 2
Views: 637

Re: EXT4 USB Disk journal corruption

RaTTuS wrote:how is the HD powered ?
From the USB port on a B+ it is a 2.5" takes 250mA, my power supply is 3A, 5.1V on the board when all powered up; but in both cases I'm using the exact same hardware, so no, it's not power related.
Regards,
Kevin Moore.
by bleep42
Mon Sep 15, 2014 8:07 am
Forum: Raspbian
Topic: EXT4 USB Disk journal corruption
Replies: 2
Views: 637

EXT4 USB Disk journal corruption

Hi, I've run into a problem with USB disk corruption. My setup is a Pi B+ running Raspbian, initial install was Raspbian 2014-06-20, I last did an update, probably 3 weeks ago. My setup is only /boot on the SD card, with everything else on a small USB hard disk, this has been working great since my ...
by bleep42
Sun Sep 14, 2014 5:45 pm
Forum: Troubleshooting
Topic: EXT4 USB Disk journal corruption
Replies: 20
Views: 3849

EXT4 USB Disk journal corruption

Hi, I've run into a problem with USB disk corruption. My setup is a Pi B+ running Raspbian, initial install was Raspbian 2014-06-20, I last did an update, probably 3 weeks ago. My setup is only /boot on the SD card, with everything else on a small USB hard disk, this has been working great since my ...
by bleep42
Tue Jun 17, 2014 11:40 am
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

Sorry to bring this back, but I know very little about electronics and I aim to buy the same model of LCD controller you have mentioned and hook it up to the rPi. I aim to build a general purpose portable computer with this and a LVDS 16" panel, which also has GPIO. I have a couple of questions: Th...
by bleep42
Wed May 28, 2014 9:25 pm
Forum: Graphics programming
Topic: Low-level (Linux framebuffer) graphics programming tutorial
Replies: 62
Views: 75748

Re: Low-level (Linux framebuffer) graphics programming tutor

... getting almost 400 generations a second, with a 704x450 buffer... That is pretty amazing. I wrote a version of life using DispmanX to demonstrate double-buffering. I am limited by the refresh rate of the display (60Hz for PAL), but can only maintain 60 iterations per second with a 500x500 cell ...
by bleep42
Wed May 28, 2014 9:04 am
Forum: Graphics programming
Topic: Low-level (Linux framebuffer) graphics programming tutorial
Replies: 62
Views: 75748

Re: Low-level (Linux framebuffer) graphics programming tutor

Hi rst, Thanks very much for your blogs, I found them by accident while googling. I've used your example code around about part 8 to implement a version of Life. I had been using a library from http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/image-processing/intro.html , but this was relative...
by bleep42
Fri Feb 07, 2014 12:17 pm
Forum: Other projects
Topic: Pi-Portable & or Monitor.
Replies: 72
Views: 52083

Re: Pi-Portable & or Monitor.

...The main problem was getting a driver for the LCD panel, I found this one M.NT68676.2A which I was able to buy and have programmed for my LCD by a company on Ebay and cost about £25 including a button board and custom cable for the LCD... That is very interesting. I haven't heard of anyone else ...
by bleep42
Sun Jan 26, 2014 12:06 pm
Forum: Graphics programming
Topic: fbturbo - dma hardly ever gets used?
Replies: 45
Views: 10378

Re: fbturbo - dma hardly ever gets used?

Hi jamesh,
Looking forward to being able to give this a go. :-)

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