TomTom How To (PocketPC Emulator) - Page 2

sama · 05-23-2006, 06:57 AM

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.

Scouse Monkey · 05-23-2006, 06:59 AM

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.

Scouse Monkey · 05-23-2006, 07:02 AM

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.

sama · 05-23-2006, 07:25 AM

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?

rustyboxx · 05-23-2006, 08:22 AM

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

sama · 05-23-2006, 09:04 AM

patiance is a virtue

(just wait a bit...)

at_b · 05-23-2006, 10:59 AM

either i m doing something very wrong or my emulator jsut does not want to save state no matter what i try, every time i start it after save state and exit, it does a cold boot, and no copied files are left there(like installed software). any ideas?
thanks

sama · 05-23-2006, 11:01 AM

yes. the shortcut you use to boot the first time should specify the rom and the flash file, but the next time you want to run it, do not use the same shortcut, use a new one that just has the switch /s pocketpc.dss

the image file contains eveythign you need, and it is the holder for the state. If you are to specify the rom image as well the state file, then you're telling the emulator to load that rom and use the statefile as it's new state file.

at_b · 05-23-2006, 11:11 AM

thank you sama
this worked a treat
exactly what i was looking for a long time as destinator doesn t have maps of where i live, and the only navigation software there is is pocketpc based
thanks again
alex

sama · 05-23-2006, 11:41 AM

we aim to please!

at_b · 05-23-2006, 12:11 PM

now another problem, when i save state and exit with the gps software running (iGo 2006) , when i return to the emulator loading the state, everything shows up ok until it tries to load some files of the "storage card", when it errors. from what i see in settings and file manger it restores the shared folder/storage card too. the navigation software craps out, closes, and doesn t work even if i try again, if i soft reboot the emulator, the storage card isn t there any more in file manager but still appears ok in settings. If i save state and exit while in the today screen with no software running everything works perfectly from what i can tell.
any more idea? sorry to be a pain
cheers

sama · 05-23-2006, 12:22 PM

yes. this used to happen to me with tomtom with the previous emulator. I'm speculating here, but my guess is that when you restore the state, the storage may not be online instantly, and it maybe that iGo is polling the file system too soon after the emulator goes online. Since it doesn't find the maps, it craps out.

I would say you should do one of the following:

have a shortcut in the start menu and have the state always start on the today screen. Then, have a script, like autohotkey (google it) that start the emulator, waits for it to load, then clicks on the screen to start your gps program. painful I know, especially since you have to wait for it.

Alternatively, you can install the igo app on the main memory. you only have 32mb to mess with there and I've not figured out how to increase that yet. Increasing the memory only seems to increase the available ram and not storage space... shame as it would have been nice to have an image with everythign on it.

Anway, hope that helps.

at_b · 05-23-2006, 12:38 PM

yup, it helps
thanks
i belive there was a command line option for flash memory, if that would work, and we could install to flash, that should be good
i ll see if i can do something
i ll post everything i find
thanks
edit: it won t work that way it seems, i ll keep on trying

sama · 05-23-2006, 12:43 PM

yeah, I managed to get the flash memory going with the old version of the emulator but not this one sadly. So I guess it's only a matter of time before the preview becomes a full release and we get a fix.

sama · 05-25-2006, 03:05 AM

more discussion here by the way