About: Why GPS doesnt work for some programs

[Slovek]

Alright,
As most of you have already noticed some GPS program's just dont work on the P3300... odd? yes but it can be explained.

The GPS unit wich is used in the HTC p3300 uses COM4 to communicate, 4800 buadrate, all working nicely. BUT... the p3300 doesnt seem to set the EV_RXCHAR flag, wicht is used by most common COM handlers, this flag indicates there is new data in the receive buffer.
Because most hobby projects use common COM handlers, they think they'r not receiving any data at all and will do nothing.

Some say solving this is possible by using Franson GPSGate (http://franson.com/gpsgate/download.asp?platform=winxp).
I have not yet try'd this because im trying to find something freeware. and the franson version is limited to 14 days.

As it seems the free progam JAL portsplitter (http://www.gpstuner.com/download/Port_Splitter.zip)(recommended bij GPS Tuner) creates a new comport and can be set to redirect the data from the GPS to other apps, but now WITH the EV_RXCHAR flags set.

Dear sir,

Thank you for contacting HTC Europe support.

Regarding your query, this handset was designed to work with, specifically, TomTom and other highend programs, as such this not a flaw or known issue but rather a feature of the device.

As such there will be no solution or update to address this.

So HTC wil not be changing the softwarez for this....
Its not a bug... it's a feature :P

[Slovek]

Update:

I have contacted HTC on the issue because the P3300 is about the only device that has this issue, also asked about the upcoming ROM update and if it is fixed.
I hope the PortSplitter i posted solves most issues for now.

[mikealder]

The iMate pda-n suffers from exactly the same fault - interesting find though all the same thanks

Mike

[dhmvas]

This is a very serius "about"

[Slovek]

Update in startpost

[djsolid]

Unfortunatelly it does not work on my HTC P3300... I choose in Input "GPS Port" but in the output it doesn't have any choice... I tried to add i vurtual port but when i choose add nothing happen...

[Registerme]

Hi guys,

I know it has been a very long time since this topic was updated, but I was wondering if anyone knows a tool that is able to change the sirf settings. I used to have a pda with a bluetooth gps receiver and I had a program that could change a lot more than just the refresh rate. There were options that could actually harm the device if set up the wrong way.

I was wondering if the stated missing feature is part of the gps chipset and can be modified or added or is it part of the entire system and can't be altered?

Regards

Sebastian

[SurfaceCleanerZ]

Hi,
has anyone sucessfully turned on Static Navigation? With beta-Versions for editors it was possible with MMSirf, but with Final versions it isn't, (this told me a mod of pocketnavigation)...
But it is only under 2,5kmh not 4 kmh as with most devices...

But its a pity, though...

Stefan

[CouchPotato]

Hi,
has anyone sucessfully turned on Static Navigation? ...

Static navigation is "On" by default!
Currently there is no solution to switch it to "Off", isn't it?

[SurfaceCleanerZ]

ok, I made a mistake: I want to go geocaching and so I want to get location data while standing still!

Stefan

[BigManni]

Hello,
gives news with GPS- Programming ? I am also interrest on a solution to switch off sn on a artemis.

[BigManni]

old Thread, so i not sure someone interrest.
Yes, i got it, sure.
it is possible to deactivate GPS SN on a artemis.
now he display continues gps coordinates also in slow speed < 2.5 kmh.
In Bootloader , mtty and SirfDemo.

is someone interested then i can give some information.

So it looks possible to Programm something on the sirf.

Sorry for my English.

[SurfaceCleanerZ]

Hi,
very cool!
How did you get this?

regards,
Stefan

[BigManni]

well, so i have do some test and its working.
so i have modify 3 mda C3 and 1 p3300.
sn are off on all 4 units .
only if you remove the Accu the it will be back.
the problem is its working not on all PC.
on one old 1Ghz athlon with a usb 1.1 ist working. on my new PC its not working. Sirfdemo hangs up wenn SIRF goes into Binary Sirfmod.
i think the binary data crash the usb port.
it looks like the bitclock of the serial sirfdata is not 100% ok.

Step by step
dissable activ sync UsbConnection
on artemis go ito Bootloader and connect to the usb
on pc start mtty.exe ,select ( Port \\.\WCEUSBH001)
(I use mtty multiport usb v0.01)
Press Return, a Cmd comes on Screen
now enter GPSRouting 57600
now starts some output ,looks like NMEA

$GPGSA,A,1,,,,,,,$GPGGA,132149.693,,,,,0,00,,,M,0. 0,M,,0000*56
$GPGSA,A,1,,,,,,,$GPGGA,132150.693,,,,,0,00,,,M,0. 0,M,,0000*5E
.....
close mtty
now install sirfdemo (i use 3.87) on the PC
( gpspassion.com/forumsen/topic.asp?TOPIC_ID=25575)
edit the sirfdemo.ini
-[DataSrc]
-Src=0
-SerPort=\\.\WCEUSBSH001
-SerBaud=57600
and save it
open sifdemo
on setup/target select GSWLT3.... and dissable. autodetection
now press the connect button.
after some sec. you will see one or more lines in the left (debug view, and errors in the right window.
now enter action menue and press switch to sirf
its works so you will only see some in the error window and no new line in the left window.
now sel. navigation menue and press static navigation, sel. Dissable and press set.
after some sec you will see an entry in the response window
wenn not retry it.
it is done then sel action menue and press switch to NMEA
a option menue comes up. you must change baudrate to 57600 !!
then press ok
now close sirfdemo.
open mtty
if you see now line by line NMEA log so it is ok, if you will see endless charters
so the switch back to NMEA are not ok. ---- Power off all and restart.
now reset the artemis and test the gps.
!!! removing the accu will reset the new setting.

i am not sure it was possible to destroy something with this.
so i have testing many many time and always is fine after removing the accu.

sorry for my english.

[SurfaceCleanerZ]

Hi,
one question:
"now install sirfdemo"
where PC oder PDA?

An Link to mtty would be nice!

Thanks for your HowTo!

btw: Ich denke eine dt. Anleitung dürfte für die meisten einfacher sein und ausreichen. Stell die doch zusätzlich unten an...

nema: You mean NMEA!

It is very interesting that you get it working, because prior Trials told, that the pin for this of the chip is not connected.

regards,
Stefan

[Inner_Bushman]

Did anyone made any permanent solution SN (static nav)? I tend to remove my battery quite often due to SD and SIM cards inside.
It would be great if someone could write and app which would manage to connect to the GPS chipset from inside WM5/6 and change the SN, even if that would be a temporary solution. I could run the tweak when i go Geocaching.

Hope to hear some good news soon,
Bushman :)