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Thread: Headunit (Linux/Windows CarPC frontend) + initial screenshots

  1. #201
    Join Date
    Sep 2004
    Woho, got it working!!!

    I downloaded the source for QT and then copied in the missing source to /usr/lib/qt/src
    BMW 325i -01

    Computer hardware:
    VIA Epia MII 10000 Nehemiah 256MB/160GB
    Casetronic Travla C158
    Gain 7" TS
    Opus DC-DC 150W

    Software: Frodoplayer and Mapmonkey

    Sound system: Front kit: DLS UP6, Rear: DLS 425 Powered by DLS RA40

  2. #202
    Raw Wave hijinks21's Avatar
    Join Date
    May 2002
    Albany, NY
    '98 Explorer Sport (down atm)
    AMD 800mhz 192megs RAM 60gig hard drive 9 inch widescreen VGA
    80% done

  3. #203
    Variable Bitrate NoPistonPC's Avatar
    Join Date
    Apr 2004

    New Release (0.3)!

    Version 0.3 of headunit is out! You can download it from the links on the first page of this thread or from the sourceforge page (

    Audio, Video, and DVD should now work (and hopefully be fairly stable).

    Bring on the bug reports!

    Unless someone convinces me otherwise, I will work on external apps and GPS next.

    BTW, how's the distro work coming?
    1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

  4. #204
    kuo is offline
    Variable Bitrate kuo's Avatar
    Join Date
    Jun 2003
    Greensboro, NC
    installed the win32 version. initially msvcr70.dll was missing. i found it in my office program folders and dropped a copy into the headunit directory. music and video seem to work great. dvd does not show video for me. only sound. i have powerdvd and the dvd works fine in that but no video in headunit.

  5. #205
    Constant Bitrate
    Join Date
    Jul 2004

    Looking good...

    Hey NoPistonPc,

    Glad to see you're continuing the effort. I just downloaded and compiled the latest version (linux) and I must say it's an improvement over the first one I looked at. Button presses are much more responsive and the time to switch between songs seems like it has gone down. I haven't had time to take a close look at things yet, but I have noticed that the feedback on the playlist display (time, title, volume) are all broken. The buttons work, songs play, but the player status says "stop," no song title is displayed and the time is 0:00. The volume indicator does not report any volume changes although the volume does change when volume the buttons are pressed. I'll see if I can get a more detailed list of bugs in the next couple of days.

    Thanks for all the great work.


  6. #206
    Variable Bitrate NoPistonPC's Avatar
    Join Date
    Apr 2004
    kuo and momanz, thanks for the feedback. I'll get right on fixing these bugs...

    BTW, I've started to play around with creating a distro. Here are my thoughts so far:

    I initially started with creating an LFS-based distro but then decided to move to Gentoo. LFS is great way to learn about the inner workings of Linux, but it takes a lot longer to get LFS up and running, and package maintenance is a pain in the ***. Therefore, I decided to go with Gentoo. Currently, I'm playing with USE flags and removing directories like /usr/portage and all unnecessary packages to reduce the size. I'll let you know how small it is as soon as I'm done.
    1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

  7. #207
    Join Date
    Aug 2004
    Clarksville, TN US
    Great to see the updates. I am still working on a distribution. I too have given up on LFS, which set me back a couple of weeks(Way too time consuming). I'm looking at a slackware install now. I believe that I should have an image for EPIAM 1000 Nemiah boards in a few days. It looks like the install is going to take up about 100MB. But I know that there will be libraries installed that are not needed. Initially there will just be an image and a howto using Knoppix to place the image on your HD. Keep working on the interface. It is the most exciting one for linux that I have seen yet.

    I didn't turn my back on my country, my country turned it's back on me.

  8. #208
    Variable Bitrate NoPistonPC's Avatar
    Join Date
    Apr 2004

    If you are actively working on a distro, then I'm going to leave it to you so that we don't repeat the same work. HeadUnit works in a framebuffer so we don't need to include X11. However, if the user wants to run GPS software (like iGuidance or Destinator), then X11 is required since we will require Wine. I suggest we make a non-GPS and a GPS version of the distro. The non-GPS version would be framebuffer based, and the GPS version would be X11 based.

    Here are some thoughts I had for how the distro would work:

    1) Files in the distro CD image:

    Base linux packages: glibc, bash, busybox, etc. NOTE: I highly recommend that you use busybox since it includes almost all the shell commands that you would ever need and it is EXTREMLY lightweight. You can even compile out the commands that you don't need.

    Framebuffer version packages:
    fbdev, qt-embedded, fbxine, freetype, plus other dependencies

    X11 version packages:
    Nano-X (small footprint replacement for a full X-server:, qt, xine, wine

    Kernel versions:
    VIA EPIA (C3)
    VIA EPIA (C3 Nehemiah)

    Optional loadable modules (one for each kernel version):
    alsa sound cards
    d-link radio
    network drivers
    other device drivers

    2) Operation of distro CD:

    1. When the user boots with the CD, the CD loads its generic kernel that works on any processor, and mounts all attached drives.
    2. It asks the user to create/select the boot, install and swap partitions. Alternatively, it offers the user an option to choose the drive and let the installer create its own partitions.
    3. It asks the user what version of the kernel to use (this should match the processor on their CarPC)
    4. It asks the user what optional kernel modules it should install (or it lets him install all of them)
    5. It asks the user if they want to do a framebuffer-only install, an X11-only install, or both.
    6. It then copies over the base image, the correct kernel version, the correct kernel modules, and the correct remaining packages specific to the type of install the user selected (framebuffer and/or X11)
    7. It runs scripts to configure all the /etc files correctly and setup grub to boot the correct kernel and boot partition.
    8. It runs scripts to configure the network correctly.
    9. It offers the option to run a GPS software installer (wine will be included on the install CD, so the GPS installer will run in wine)
    10. Boot the CarPC.

    Just one possible way for how it could work...

    Let me know how you were planning to do it.
    1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

  9. #209
    FLAC jbors's Avatar
    Join Date
    Nov 2003
    Just wanted to warn you about going straight to the FB. It is slow. Extremelly slow. Especially on EPIAs as C3 is slow by itself. I did those tests back in Jan and PyCar was not able to render stuff fast enough( I'm not even talking about movies rendering ). HU may have different technique, but you'd better do testing first.

  10. #210
    Variable Bitrate NoPistonPC's Avatar
    Join Date
    Apr 2004
    jbors, i'm actually glad you mentioned the problems with FB. I was considering scrapping FB as well and going with a very lightweight X setup (like nano-X plus fluxbox). This makes my decision easier.
    1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

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