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Ongoing Raspberry Pi problems

Discussion in 'Electronic Design' started by Don Lancaster, Dec 30, 2012.

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  1. I still cannot seem to get the pi to boot.
    I have ordered a bundled precoded package.
    Supply voltage at the pin diagonals is 5.01
    Using RCA video with speed 4 memory. Only
    the red LED lights.

    Both of the present SD memory cards seem to have
    an awful lot of early zeros in the code. A
    modified hex dump looks like this...

    ú¸=ŽÐ¼=°¸==ŽØŽÀû¾=|¿=¹=ó¤ê!==¾¾8u ƒÆþþuóë´°»=|²€Št‹
    LÍê=|==ëþ=====================================================
    ================================================================
    ================================================================
    ================================================================
    ================================================================
    ========================================================i{====‚
    = ¥= ===À==¥ƒÖ+ë=à==ð7=================================Uª
    ================================================================
    ================================================================
    ================================================================
    ================================================================
    ================================================================
    ================================================================
    ================================================================
    ================================================================
    ================================================================

    The nulls have been replaced by = to not choke wordpad.
    Both SD cards seem identical in early code.


    Is this normal pi wheezy code?



    --
    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
    rss: http://www.tinaja.com/whtnu.xml email:

    Please visit my GURU's LAIR web site at http://www.tinaja.com
     
  2. Nico Coesel

    Nico Coesel Guest

    Just return the bloody thing. Its obviously broken; other people
    pointed out the other leds should light up as well. Next time try it
    with the card that comes with it (or order a complete kit with
    pre-formatted SD card).
     
  3. G. Morgan

    G. Morgan Guest

    I got one with the OS on the SD card already. Plugged it into the HDMI
    port and it booted up the first time, no problems. Typed "startx" and I
    was in business, Internet connectivity and all.

    How did you prepare your SD card? Did you use the Windows Imager
    utility?
     
  4. I downloaded wheezy.zip in windows 8 in on and then drug and dropped it
    into the memory card.

    The card showed nearly the full 2 gigs from the much shorter zip file
    and an .img trailer.

    Doing this twice seemed to produce the same restult.


    --
    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
    rss: http://www.tinaja.com/whtnu.xml email:

    Please visit my GURU's LAIR web site at http://www.tinaja.com
     
  5. From the looks of it you need to get this utility to setup the boot
    sector on the sd card.
    <https://wiki.ubuntu.com/Win32DiskImager>

    use the wheezy img file as the source. This creates the boot partition
    on the sd card.
    I'm assuming it’s a linux disk with multiple partitions, but I could be
    wrong.

    Cheers
     
  6. Jasen Betts

    Jasen Betts Guest

    that's not going to work

    you need to overwrite the memory card with the img file
    dunno how to do that on ms-windows
     
  7. Andrew Holme

    Andrew Holme Guest

    "Don Lancaster" wrote in message news:...
    The SD Card is Linux format. You have to use a special imaging tool to make
    one on a Windows PC.
     
  8. G. Morgan

    G. Morgan Guest


    That's your problem, you didn't RTFM.

    Watch this:
     
  9. G. Morgan

    G. Morgan Guest

    Yup. Says so right in the "quick start" page. Drag and drop from a
    Win8 machine is as useless as tits on a boar.

    http://www.raspberrypi.org/downloads

    To use an image file, you will need to unzip it and write it to a
    suitable SD card using the UNIX tool dd. Windows users should use
    Win32DiskImager. Do not try to drag and drop or otherwise copy over the
    image without using dd or Win32DiskImager – it won’t work. If you’re
    still not clear on what to do, the community on the Raspberry Pi Wiki
    has written a guide for beginners on how to set up your SD card.

    Guide for beginners:
    http://elinux.org/RPi_Easy_SD_Card_Setup
     
  10. notbob

    notbob Guest

    I ran across this:

    <http://www.everydaylinuxuser.com/2012/12/everyday-linux-user-guide-to-setting-up.html>

    .....though I gotta wonder where an "everyday linux user" finds a
    Windows box. I use Slackware every day, but jes happen to have an XP
    box at my disposal, though rarely ever use it. Seems someone should
    write one of these tutes from a Linux only perspective.

    nb
     
  11. Les Cargill

    Les Cargill Guest

    You'll need an open DOS window for this approach.

    You can use "dd" from here:
    http://www.chrysocome.net/dd

    dd copies the raw data from the img file to the device.

    dd --list will show you the device IDs ; one will be for
    the memory card when it's plugged in.

    The mount point for i: on this machine is

    \\.\Volume{68c3864c-134e-11e0-ab8e-806e6f6e6963}\
    link to \\?\Device\HarddiskVolume7
    removeable media
    Mounted on \\.\i:

    so you can refer to the device at I: as \\.\i:
     
  12. Les Cargill

    Les Cargill Guest

    That's what the dd tool is for under Linux.
     
  13. I found this particular problem.
    I was copying an .img file into the SD card rather than imaging an .img
    file into it. The needed image copy software is extremely dangerous.

    The pi now boots but has monitor problems.

    --
    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
    rss: http://www.tinaja.com/whtnu.xml email:

    Please visit my GURU's LAIR web site at http://www.tinaja.com
     
  14. Chris

    Chris Guest

    The instructions on the Wiki (particularly) are concise, accurate and
    worked for me on the first try (re: imaging my own SD card).
    It's like a sharp knife - also extremely dangerous when inexpertly used.
    Check the forums:
    http://www.raspberrypi.org/phpBB3/viewtopic.php?f=26&t=5851

    HTH
    Chris.
     
  15. G. Morgan

    G. Morgan Guest

    Mine did at first too. You have to manually go in and set the screen
    resolution. I turned off "overscan" in config.txt and it worked fine.

    http://elinux.org/RPiconfig
     
  16. G. Morgan

    G. Morgan Guest


    Heh! I wouldn't post bad information in this group, you guys are likely
    light years ahead of me in electronics design. I just post my own
    experience, no guessing. I would look like a fool against some of you
    if I went around guessing. ;-)
     
  17. Jasen Betts

    Jasen Betts Guest

    Theres's a section covering two linux GUI linux tools and a link to a
    command-line method
     
  18. Warren

    Warren Guest

    As the others have pointed out, it seems that the media has not
    been set up correctly. The easy way to get "started" is just to
    buy the media already installed on it. Then learn how to get yo
    own media setup after you know it all works.

    WRT power, if you are using a USB charger that barely meets the
    current requirements, the voltage may come up too slowly to allow
    a clean RESET of the SoC.

    I've watched the voltage on an LG USB charger rated at
    0.7 Amps come up to 5 volts over the course of a few seconds -- probably
    not good for a good RESET. A perky power source is
    required.

    Warren.
     
  19. Warren

    Warren Guest

    Agreed but defective media likewise trumps good hardware. :)
    That won't stop people from trying it.

    Warren.
     
  20. Warren

    Warren Guest

    The media is easily checked on any number of known working machines.

    In the end, in a mix of hardware and software, all the ducks must
    be in a row.

    Warren.
     
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