Hallo!
As I understand it, the V_ADP-pins of the 22pin-connector of the ?DA are for +5V to power the device. What shall I do with the USB_VDD-pin when creating my own cable? Has it to be connected to +5V, or just in case I´d like the ?DA to switch on when connecting?
In addition to that, Do I have to connect all three pins (20, 21, 22) to +5V or is it enough to just connect one of them?
And: What I did not get clear until now, is GND for power and audio the same, are they internally connected? Or should I use different grounds for audio and power?
Many thanks in advance,
Related
Hi there,
let me first thank you for this great site you put up here!
And here comes my question:
I want to hook up my USB GPS Mouse (made for the notebook -
meaning it get's it's power via USB) up to my XDA.
And now I wonder if I can simply solder the data +/- cables
from the USB Mouse to the USB data +/- pins on the XDA plug
(so I could still use the same cable for ActiveSync on the PC),
or if I have to solder the data +/- cables from the USB mouse
to the serial RX/TX pins as described on the 'The XDA's connectors'
page of this site...
I was planning to hook both the GPS and the XDA up to my car
power adaptor in a kind of a Y constellation:
::::::::::::::::::::::::::::::::__________ Power
:::::::::::::::::::::::::::::::/
::::::::::::::::::::::::::::::/
::::::::::::::XDA ----------
::::::::::::::::::::::::::::::\
:::::::::::::::::::::::::::::::\___________ GPS
and use Power for both.
Maybe someone can tell me about the data hookup.
Thanks, Lars.
I don't have answers but some things you have to consider.
1) The XDA is a slave device. I presume the GPS receiver is one too. I really wonder if they can communicate with eachother
2) Based on how you describe this you want to power the receiver from the the car. I assume you have checked the right voltage requirements for the receiver and that the powersupply can deliver the currents required for both the XDA and the receiver. My personal experience is that the latter shouldn't be too much of a problem, but it can't hurt to check.
3) Combining USB and Serial the way you describe it is not a good idea. (mark the last character '.' as in PERIOD).
Robert
Power Supply
Hi Robert,
thanks for your suggestions.
Indeed both (the original ActiveSync cable from the XDA and the
USB GPS) get their power off a USB port on the notebook so
this must be the same voltage requirements.
This ActiveSync cable is a combined car charging cable with an
USB 'A' type connector on the end which you can plug either into
the USB port on the notebook (where it also ActiveSync's) or into
the car's power adapter (where it only charges).
So this both same voltage. And the car power adaptor should
nominally supply enough power for both...
But I don't understand what you said about it not beeing a good
idea to hook up the USB data to the SERIAL data.
When plugged into the notebook in WinXP the USB GPS installs
a 'Prolific USB-to-Serial COM5' to emulate to the programms
working with it a com5 (or com1 or com2 depending on your
hardware settings) communications port. So I guess the data
coming from the USB GPS is just the same as if delivered via
serial cable and all the driver does is faking to be a serial port
to any programm asking for data from com5.
And I think a USB device is 'not really' a passive device as it starts
popping out ASCII data strings as soon as it get's power (no matter
if there is a device to read the data or not).
So I figure when you plug it into the XDA and tell the XDA by means
of USB wakeup (USB_VDD pin 13) that there is an active USB
connection, that it will start trying to figure out what the heck the
connected cable is trying to tell it.
And here is the tricky part where I don't know if the XDA might not
believe it is beeing Sync'ed and therefore starts ActiveSync.
Anyone with any experience or suggestions there...??
(Sorry for the rather lenghty post)
Greetings, Lars.
Lars,
seems like you got the power all figures out
regarding the usb/serial discussion.
If I understand you correctly you can plug the USB connector of the GPS receiver into the USB port of the PC.
'somewhere' in the PC this is modified into a virutal serial port in order to enable serialport aware programs to work with the GPS receiver as well.
This is a good concept but at an electrical level that still means that the GPS receiver is connected in an USB fashion. There is nothing Serial Port about that. In a way you already pointed that out in your messages by using the word 'emulate'.
You can hook it up to the USB part of the XDA but still I doubt about the master/slave discussion of USB.
Regards Robert
No cahnce.
Save yourself time/money.
Forget it.
Lars said:
Hi there,
let me first thank you for this great site you put up here!
And here comes my question:
I want to hook up my USB GPS Mouse (made for the notebook -
meaning it get's it's power via USB) up to my XDA.
And now I wonder if I can simply solder the data +/- cables
from the USB Mouse to the USB data +/- pins on the XDA plug
(so I could still use the same cable for ActiveSync on the PC),
or if I have to solder the data +/- cables from the USB mouse
to the serial RX/TX pins as described on the 'The XDA's connectors'
page of this site...
I was planning to hook both the GPS and the XDA up to my car
power adaptor in a kind of a Y constellation:
::::::::::::::::::::::::::::::::__________ Power
:::::::::::::::::::::::::::::::/
::::::::::::::::::::::::::::::/
::::::::::::::XDA ----------
::::::::::::::::::::::::::::::\
:::::::::::::::::::::::::::::::\___________ GPS
and use Power for both.
Maybe someone can tell me about the data hookup.
Thanks, Lars.
Click to expand...
Click to collapse
Guess U R right
Hi Guys thanx for the feedback,
I spent an afternoon researching on this stuff and am very disappointed that I have to admit you are both right.
Now way (other than putting some 'intelligent' converter between the USB GPS and the RX/TX pins of the XDA) to make the USB 'language' sound like 'SERIALean'.
I think there should still be a possibility:
Let everything run via the USB, persuade the XDA it's not ActiveSync talking to it and write a driver that talks to the GPS via the open USB connection and sends the proper commands to recieve the NMEA ASCII.
And then you would still need to tell your route software to take the incoming data from the virtual (or emulated) COM port...
And when I read the above chapter once more :shock: I find this is definitly not a job for me!!
So I will just get a serial GPS an hook it up the nomal way.
Cheers and thanx again, Lars.
Hi,
Just read your post. I am new to pda land. Just bought a xda2
I have a laptop which I use with a gps usb mouse via usb on the laptop. Am I right in thinking that I could have bought a ps2 mouse and used a ps2 changer to usb and it would have worked??
If so can't I buy a usb to ps2 changer in order to plug into a car connection cable which has the ps2 and the xda conection and a ciger lighter plug for power? OR is there a similar cable for a usb connect for gps?
Am I missing something here?
Thanks
P
I don't know much about USB. I was thinking coming up with ONE cable with three connectors like the one I draw blow.
Code:
XDA -------USB (to laptop or ac adaptor)
|
|
GPS (the generic GPS connect).
NOTE: the ac adaptor output port is an USB port
it serves for three ways
a), XDA -> Laptop, charge and syn in the same cable, draws power from laptop
b). GPS -> laptop, draws power from laptop
c). XDA -> GPS, in this case, USB connector connects to the ac adapter and power both GPS and XDA.
I believe the XDA---USB cable can be purchased easily. I can break the cable and somehow insert the GPS connector. since GPS only used a power pin, two data pin, a ground pin, I figure I only need to find out how to get these four pin into the original cable.
My question is
1. do I need any USB-serial sort of convertor between the lines? Or it is ok to connect GPS(serials signal) to USB cable
2. The ac adapter was to power the XDA which I blieve is 6V, and GPS needs 5 V, is it OK?
3. anyone alreadys knows how to plug the four GPS pins to USB cable? would save me a lot of trouble.
It would be cool to have a cable connects between all devices. If you can care for a DC-AC convertor in your car, this set should solve all your problem anywhere.
help is appreciated.
Most GPS units are serial. The XDA does have serial, so you can use that. You only need to connect the ground and two data pins. Specified input power for the XDA is 5v.
You can see what I did with a cradle to make a car kit here:
http://www.mywirelessoffice.com/xda/carkit/
This is a pin spec and photo of the connector:
http://www.mywirelessoffice.com/xda/connector/
There is a source for bare connetors, I believe the link is here on the XDA-Dev site somewhere.
Re: XDA -> Laptop USB, GPS-> laptop USB, are they the
It is possible. But note:
1. I assume you are using a serial GPS (with appropriate wiring), then it is OK. USB GPS CANNOT be used.
2. USB sync cable is wired to tell XDA that USB sync cable is connected so as to "wake up" the USB port. In such case, I do not know wheter the serial port can be accessed. As such has not been done before you have to try before you know.
I would suggest you make a cable just for GPS use, and use another cable for sync/charge (this is quite cheap), unless you found that your original idea works.
pine said:
I don't know much about USB. I was thinking coming up with ONE cable with three connectors like the one I draw blow.
Code:
XDA -------USB (to laptop or ac adaptor)
|
|
GPS (the generic GPS connect).
NOTE: the ac adaptor output port is an USB port
it serves for three ways
a), XDA -> Laptop, charge and syn in the same cable, draws power from laptop
b). GPS -> laptop, draws power from laptop
c). XDA -> GPS, in this case, USB connector connects to the ac adapter and power both GPS and XDA.
I believe the XDA---USB cable can be purchased easily. I can break the cable and somehow insert the GPS connector. since GPS only used a power pin, two data pin, a ground pin, I figure I only need to find out how to get these four pin into the original cable.
My question is
1. do I need any USB-serial sort of convertor between the lines? Or it is ok to connect GPS(serials signal) to USB cable
2. The ac adapter was to power the XDA which I blieve is 6V, and GPS needs 5 V, is it OK?
3. anyone alreadys knows how to plug the four GPS pins to USB cable? would save me a lot of trouble.
It would be cool to have a cable connects between all devices. If you can care for a DC-AC convertor in your car, this set should solve all your problem anywhere.
help is appreciated.
Click to expand...
Click to collapse
Help me psl my IIi can not heard phone conversation when plug sync charger.
I have exactly the same problem.
I bought a retractable sync/charge cable from ebay.
http://stores.ebay.co.uk/PDA-Sync-and-Charge-Cables-and-Crad
However, if the cable is plugged into the phone, then the phone speaker (and I think also the mic) are muted. The cable dosn't even have to be plugged into the PC USB port to cause this problem.
At first I thought this was some incorrect wiring on pin 19 of the connector at the XDA end of the cable. This signal is meant to control whether the sound is driven out of the car kit pins or not. However, this signal was not connected on the connector, which should be ok.
I noticed that if the phone is paced in the original sync cradle, then the pda appears to go into handsfree mode, which would tally with one of the functions of pin 19.
All I can guess is that the s/w in the phone detects a signal on the USB pins and attempts to route sound out via the car kit pins.
Anybody know of a fix for this?
Cheers,
Chris.
I know many people have exactly this problem. It is not a problem of our XDAIIi, it is the problem of the Sync charger. I remember someone has shown how to fix this problem of the sync charger in a Vietnamese mobile phone forum but I don't understand anything 'bout electric so I can not translate it. What a pity!
Hi MrSandman,
I dont speak Vietnamese, but I do know electronics.
If you could post a link to the forum, I may be able to make some sense of it.
Thanks,
Chris.
I have the link but I'm sure u will not understand anything 'cause everything is in Vietnamese. In that topic, one guy said that he could fix that f***ing problem and if anyone wanted to fix it, just brought the sync charger to him. He just shown how to fix it in a few words that no one could understand. But in general, he said: "open the plug head of the sync charger and remove the first "masse" string". Does anyone know what is the "masse string"?
Fixed !!!
This works for my cable - but try this at your own risk!!
After thinking about it some more and re-reading the connector signal descriptions here:
http://wiki.xda-developers.com/index.php?pagename=Connectors
I took another look at the wiring in my cable.
I noticed that pin2 (GND/Sense) was connected to the other GND pins at the XDA end of the cable. The notes in the above web page states this will cause the phone to hang up.
I disconnected this pin from GND and now I can hear phonecalls when the cable is plugged into the phone.
I noticed that pin 5 (Analog GND) was also connected to the other GND pins which is also apparently a bad thing. I disconnected it just in case.
Pins 20,21 and 22 are the 5v positive charge connections. They are not connected in my cable and I wondered about connecting them to the USB 5v signal. I decided to leave it in the end as they may draw too much current form the USB port. The phone does charge anyway - just very slowly.
Hope this helps.
Chris.
Mentioned fix works fine for me
Thanks!
I have the same problem also.. i've read the wiki but did'nt catch well what it saying. Please put in in a simple words step by step what to do..oo please..
2 GND / SENSE
5 ANALOG GND
16 GND
17 GND
18 GND
In my cable connector there were two small red wires soldered to 3 pins (from '2' to '5' and from '5' to all three GND pins which were soldered together as one pin;
The thing is that '2' shouldn't be connected to GND. In wiki there were suggestion not to connect '5' to GND as well (has nothing to do with sound problem).
I removed those red wires and everything is working fine (I'm using it for a month now);
Be careful and good luck!
Normal cables provide +5v on pin 1, for charging purposes. This also provides power to unused pin 4 for Factory Mode, if so wired.
I was wondering: will the phone connect to a PC without being supplied power at all (e.g. only Data +/- and GND connected), or is the 5v needed for sense purposes and/or to power the onboard USB controller?
Are there any Mio Navigation/dashcam specialists around? Or anyone USB OTG wise?
My Mio Drive 65 LM Truck + Mio MiVue A20 camera connection cable has been cut and the nav-side connectors are gone.
Some #^%!9*^# stole my Mio Drive 65 LM Truck navigation from my car, and CUT OFF the power and connection cables to the Mivue A20 rear camera.
I was able to find a used navigation unit at a reasonable price, but can't get it back working.
The point is that the cable for the MIO camera (and perhaps the cable of the original car charger - see below) is some sort of an OTG cable.
The camera is powered by the navigation device that has a mini USB socket for connecting the camera cable. It also has a second minu USB socket - for power. The camera itself, has a micro USB socket, so the connecting cable is a mini-micro one.
The problem is that the webcam cable is not an ordinary mini-micro USB or ordinary OTG but something else. (if an ordinary OTG cable exists, ‘cause it seems that each developer does it his own way)
The interconnecting cable has only 3 wires: Vcc, D-, D +, and Ground.
And no matter how I connect it, the device does not initialize the rear cam.
After browsing the entire internet ;-) I came to the conclusion that at the end of the cable that had been cut off, there was probably some resistor between "G" and "ID" of the correct navigation output, which, similarly to OTG, allows the device to see that the camera is connected, and that it needs to be powered and initialized.
So I tested various resistors between "G" and "ID" of this socket, but with no results. I've tried several, 28.7K, 34K, 64.9K, 102K, 121K, 150K, 200K, 255K, 301K, 365K and 442K before I gave up.
Does anyone know what's going on?
Perhaps someone has an original cable for this set or a "Y" cable for other recorders and could explore what is hidden in them?
Anyone measured those connections?
Or perhaps the "trigger" G-ID connection is on the power supply…
Anyways, I'm in urge for help from someone that already solved this, knows the architecture or simply has the original wiring and could measure the resistance between “G” and “ID” pins of both the interconnection and the factory charger cables.