Page 2 of 22 FirstFirst 123456789101112 ... LastLast
Results 11 to 20 of 212

Thread: TomTom How To (PocketPC Emulator)

  1. #11
    FLAC sama's Avatar
    Join Date
    Feb 2006
    Location
    London, UK
    Posts
    1,375
    here's a video of it in action. please exucuse the wobbling but I was driving. And this is a demo of the route and not the actual live feed as my gps mouse is not being picked up by the emulator. A wired version is on it's way

    You may need a player to view these mp4's from my mobile phone

  2. #12
    FLAC Marvin Hlavac's Avatar
    Join Date
    May 2005
    Location
    .... . .-. .
    Posts
    1,015
    Nice, thanks for sharing the video clip. However, I don't see the smooth, fluid movement of 3D map I'm used to on my wife's old TomTom GO. TTG refreshes screen 4 times per second, but the map in the above video seems to jump once per second only.

  3. #13
    FLAC sama's Avatar
    Join Date
    Feb 2006
    Location
    London, UK
    Posts
    1,375
    yes, as it does on the pocketpc. the ppc version has never been as smooth as the tt go/palm version. this is due to tomtom not coding it correctly for the ppc!

  4. #14
    MySQL Error Scouse Monkey's Avatar
    Join Date
    Mar 2004
    Location
    Bristol
    Posts
    9,727
    are you sure it's not because the tomtom go has a 4hz gps module and you are using a 1hz gps module? Maybe tomtom is coded to react to the gps update rate and with a 4hz input will do it.

  5. #15
    FLAC Marvin Hlavac's Avatar
    Join Date
    May 2005
    Location
    .... . .-. .
    Posts
    1,015
    As far as I know TTG has just a plain regular 1Hz receiver, but the 4Hz screen refresh is something the software does. The software actually does one more very neat trick: it anticipates where you will be in about a second and it displays this "predicted" position. This way it masks the one second natural "delay" we see in other navigation solutions. The resulting effect is that it appears the GPS arrow shows EXACTLY where you are even when moving. (In other software you would normally see a one or two second lag.) This is very neat (even though I don't like TTG for other reasons).

  6. #16
    FLAC sama's Avatar
    Join Date
    Feb 2006
    Location
    London, UK
    Posts
    1,375
    I've always been annoyed at the speed of the ppc version of tomtom. nothing to do with the feed speed afaik, it's to do with how tomtom impleenmted it. the tracking you speak of is also done on the ppc. it's no more than a linear alpha-beta tracker (here's my vector, what's my next position based on the last vector?). alpha beta trackers are crappy on curves. u need a kalman filter for that and they're too expensive. saying that, road data + route data + alpha beta filter can tell you where you're heading, but without a route, you'll find it can be left or right, and this is why when going around curves without planned routes, the gps always messes up.

  7. #17
    MySQL Error Scouse Monkey's Avatar
    Join Date
    Mar 2004
    Location
    Bristol
    Posts
    9,727
    its not that hard to do. it's just using interpolation. that is how i wanted our GPS software to be done by adding an intermediate inbetween the gps and the software to manually provide gps coords but D3 can only refresh at 1hz anyway.

  8. #18
    MySQL Error Scouse Monkey's Avatar
    Join Date
    Mar 2004
    Location
    Bristol
    Posts
    9,727
    Sama, the uBlox gps has basic kalman filtering to take gyro and speed pulse data and fill in the gaps when gps signal is low. unfortunately the chips they use at the moment cannot handle outputting at more than 1hz even though the inertial calcs are done at 40hz. I did try and get a standalone kalman/2D inertial system developed at work but we didnt have any suitable undergrads and tbh it would probably be a masters/phd level project. Saying that someone on here could probably do it pretty easily due to the vested interest.

    edit: combine that with a 4+hz gps reciever and you would have a very nice gps system.

  9. #19
    FLAC sama's Avatar
    Join Date
    Feb 2006
    Location
    London, UK
    Posts
    1,375
    agreed. i do know someone that works on embedded systems in sussex uni. he's a post doc and developing for the mod passive naigation. perhaps i'll pick his brains for some code sometime. if only there was open source routing library I'd write my own mapping app. anyone up for the challange?

  10. #20
    Poet Laureate rustyboxx's Avatar
    Join Date
    Feb 2005
    Location
    The Côte d'Azur of England - Hot totty central
    Posts
    1,289
    Quote Originally Posted by sama
    agreed. i do know someone that works on embedded systems in sussex uni. he's a post doc and developing for the mod passive naigation. perhaps i'll pick his brains for some code sometime. if only there was open source routing library I'd write my own mapping app. anyone up for the challange?
    I'd love to be able to help........... but I can't even figure out how to get TomTom installed on my lappy
    Only true postwhores remember everything they post

    REP CLUB IS DEAD
    LONG LIVE REP CLUB

Similar Threads

  1. ONINE PETITION: TomTom Navigator for PC
    By bLindmOnkey in forum GPS
    Replies: 19
    Last Post: 06-07-2007, 01:16 PM
  2. Replies: 25
    Last Post: 11-27-2006, 12:28 PM
  3. TOMTOM / Pocket PC Emulator / RR
    By craignichollls in forum Road Runner
    Replies: 107
    Last Post: 08-25-2006, 03:51 PM
  4. PocketPC as a Touch Screen Replacement
    By sama in forum Other Cool Front Ends
    Replies: 59
    Last Post: 08-05-2006, 04:53 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •