Database Develop

Hardware from Palm-PDA connected to the XDA???

Hy guys.
Maybe someone can give me some hints, tips or explenations....
Is it possible to connect hardware, that is designed for Palm PDAs at the XDA?
For example there is a digital camera, for palm to connect via the SD-Port, or for another posibility a VGA-Connector for Palm, also connecting to the SD-Port....
MAybe some of you have experience, or yould suggest other hardware to use a digital camera or a beamer at the xda....
Regards
Stefan
:?

The Palm accessories use SDIO. The XDA only support SD Memory cards.
So sorry, it won't work.

BA as car(pocket)pc

I've bought a used xv6600 off ebay which I'm going to convert to a carpc.
As a first time BA user, i have a few questions.
I have read the wiki/searched the forum, but I'm a bit mixed up and hence posting this thread.
installed versions on the phone:
model: PH20A2
ROM version: 1.36.00 WWE
ROM date 01/13/05
radio HA01_151
protocol AA.3.3.3.01
PRL 50619
extrom 1.36.116 WWE
hardware version 0041
a few notes:
- Its not going to be used as a phone as I can't register it with my local cellular provider (although they do support CMDA EVDO) - so I couldnt care less about if its radio works..
- Its going to be paired to a BT GPS from socket.
- the BA/xv6600 is going to be permanently mounted into the car (I'm still designing how, it would be in horizontal mode though).
- since It'll be permanently mounted, I won't (and couldnt) use the keyboard..
- audio out is going to be used to connect to an external speaker
- the BA will be charged from the car's 12v (always connected).
my questions are:
1) where could I find schematics for getting audio output (if exists), as well as where to connect the charge directly to the BA's connector.
I have only a cradle, no sync cable, which means I'd probably have to open up the BA and soldier directly, or get a connector...
2) should I connect audio out to the connector (if possible?) or the 2.5mm output on top of the device.. ?
3) I'd be interested in upgrading to WM5, I've read on the forums that it isn't possible on the CDMA versions because the radio doesnt work (or does it?). Since I don't care about the radio, could I install WM5 ? which ROM would be suitable for my BA model ?
awaiting your answers,
thanks!

Sounds like a neat project
ido said:
- the BA will be charged from the car's 12v (always connected).
Click to expand...
Click to collapse
Might be a bad idea...car batteries are designed to give out high power for short periods, not low constant drains. Personally I'd connect it to the ignition circuit so it's only powered when the ACC line is live. This will also turn it off for you after X minutes if you use the "auto-power off on batteries" function. It may even turn it on for you!
1) where could I find schematics for getting audio output (if exists), as well as where to connect the charge directly to the BA's connector.
I have only a cradle, no sync cable, which means I'd probably have to open up the BA and soldier directly, or get a connector...
2) should I connect audio out to the connector (if possible?) or the 2.5mm output on top of the device.. ?
Click to expand...
Click to collapse
The connector does have audio available. Buy a cable and hack it because if you mess it up you just buy another. Messing up the connector itself on the phone is more fatal. I think the schematic is on the wiki for the actual pin outs.
You might also find these useful:
http://wiki.xda-developers.com/index.php?pagename=Connectors
http://forum.xda-developers.com/archive/index.php/t-235616.html

yes after constant searching , i also found those threads.
Yet I'm wondering, some connectors don't include all 22 pins, but only the ones actually used for charging (for example) - and then it'll be really hard to hack them.
I guess i'll just have to hope I buy one that does have all 22 pins installed... unless you have other idea's for me.
Also, for the charger, you're right, I didn't mention that, but thats somewhat my intention.
Since the unit will be permanently mounted, I won't be able to sync it (unless I bring a laptop to my car) - could I somehow get a two SD cards installed at once to the unit ?

ido said:
yes after constant searching , i also found those threads.
Yet I'm wondering, some connectors don't include all 22 pins, but only the ones actually used for charging (for example) - and then it'll be really hard to hack them.
Click to expand...
Click to collapse
Yes, that's correct. If you get a charge & sync cable you'll have most. Might need to take audio from the 2.5mm jack in that case. That's probably the simplest solution if you cannot get a fully wired one. I'm interested in this sort of thing, so if you could post an update on what you go with I'd be grateful.
Since the unit will be permanently mounted, I won't be able to sync it (unless I bring a laptop to my car) - could I somehow get a two SD cards installed at once to the unit ?
Click to expand...
Click to collapse
I doubt you could get two SD cards. What may be possible is some sort of SD card extension device. Never seen one (never looked), but if it existed you could have a dash-mounted SD card.
Bluetooth or WiFi might help you e.g. with WiFi you could browse a network share to copy music over from your house. Also, there is a tool for WM5 that turns the phone into a keydrive, i.e. a USB mass storage device. Unless you need contacts etc sync'ed, that might be a bit simpler & give you more options to what you can hook up for.
PS bluetooth on WM5 isn't all that great. There is a "fix" that wakes the device now and then. This would light up your car overnight and might possibly be a thief magnet. On the other hand, if the battery dies on WM2003, you lose the data on it.

- At first I thought of making the device extractable, so I thought it'll be better to use the connector on the bottom for audio, but I've decided not to go this route (more complications and harder to make - also makes it easier for thieves.
So I'm probably going to go for the 2.5mm jack for audio.
- as for SD, since the SD slot won't be accessible, I thought of making an SD slot on the dashboard - and I'd like to switch between both.
an SD is connected via 9 pins, meaning making an SD switch is possible, but you wouldn't be able to use both.. thus I was wondering if software/hardware wise there is a builtin capabilty of such a thing as using two SD's at once. that'll be really cool.
- unfortunatly my XV6600 does not have WIFI, and BT is NOT an option for syncing (too slow !! - just imagine syncing 2gb of audio/vid via bluetooth..)
the two idea's I've had is making a USB connector on the dash (just incase I can get a laptop in the car..)
and the other, was the dash SD slot..
- for bluetooth, can't I just disable auto wakeup ?
- how will upgrading to WM5 save my data even if the battery drains ? its the same RAM chip's, not flash ROM, isn't that right ?
- as for HR's, the question is if I can somehow get the unit to 'working order' by installing software from the SD card, without actually syncing it to a computer..

fraser: Since I'm going to be connecting the ppc to the ignition circuit, and I'd also like to have a USB connector on the dashboard, I'd need to switch between the two.
i already have a car 12v connector -> usb charger device.
Should I buy a SYNC cable and convert it to charger, or car charger and convert it to USB cable ?
(although car charger might not have all the right pins..)

ido said:
thus I was wondering if software/hardware wise there is a builtin capabilty of such a thing as using two SD's at once. that'll be really cool.
Click to expand...
Click to collapse
Never heard of that I'm afraid. A switcher may work, but make sure there aren't any other physical switches that get tripped when you put a card in.
- for bluetooth, can't I just disable auto wakeup ?
Click to expand...
Click to collapse
No, this BT issue is the biggest one on WM5
- how will upgrading to WM5 save my data even if the battery drains ? its the same RAM chip's, not flash ROM, isn't that right ?
Click to expand...
Click to collapse
No, it's different ones. WM5 uses the "storage" area for your personal data; you now no longer have /storage as it's all in there. The RAM becomes proper RAM, although you can use some of it as a ramdisk with the same loss-of-power issues as WM2003.
- as for HR's, the question is if I can somehow get the unit to 'working order' by installing software from the SD card, without actually syncing it to a computer..
Click to expand...
Click to collapse
That's exactly what I do. I've stopped using the PC installers, there is enough junk on my PC. Just find the cabs for the apps and keep a copy on the SD card.

Not all apps have cabs.. so that might be a problem.
as well as I'll have to make pre-made .reg fixes just incase I'll have to HR.
as for WM5, if I install it, won't I have less free space then ?

ido said:
Not all apps have cabs.. so that might be a problem.
Click to expand...
Click to collapse
You can extract the cabs in various ways. Some exe's can even be opened in winrar.
as for WM5, if I install it, won't I have less free space then ?
Click to expand...
Click to collapse
You can reformat the storage area to 60 meg before the upgrade. Only before though. You don't get a memory slider like in WM2003.
Still, I'm not so sure on WM5 being the best for you. You'd want to have reliable BT and I'm not sure it is on WM5.

So I guess I'll stick with WM2003 for the time being.
I'm ordering an SD slot for the dashboard, as well as a USB connector.
Another Idea I've had is the need for the hardreset as well as reset button.
to which version should I upgrade my rom then ?

ido said:
- an SD is connected via 9 pins, meaning making an SD switch is possible, but you wouldn't be able to use both.. thus I was wondering if software/hardware wise there is a builtin capabilty of such a thing as using two SD's at once. that'll be really cool. ..
Click to expand...
Click to collapse
sorry to butt-in but, someone had done that before: SD-WiFi & SD Mem Card in parallel on the same 9 pin source: pda sd expansion.
a switch might be of help if you don't want to use the two slots simultaneously.

Yes I've seen that. Its a pretty lame hack if you read it to the end.
there's a better link with larger photo's for anyone interested:
http://homepage.ntlworld.com/david.hutchinson27/pockpc/
also, his project doesnt seem to work at the same time, and I've decided not to go with the switch route.
I'm reading a lot of the SD specs, So there is a very slim possibility I'll be able to get two cards to co-exist (and I would love some proffesional help if any of you guys know more about SD's then I do).
if not, then I'll just make an SD slot on the dashboard..

IrDA

does it really lacks the IrDA port?
I use the irda port on my wizard to download my Polar Data.

Yup, it really does lack IR.
Gordon

Damn you HTC
edgardito said:
does it really lacks the IrDA port?
I use the irda port on my wizard to download my Polar Data.
Click to expand...
Click to collapse
Sucks big time. I used my Trinity as a universal remote. I hate it when they replace specs instead of just upping them.

Cutting reduces cost, size and use of battery life.
Most people didn't use IrDA

maybe you can find one for the SD/IO port ?
DLD

RacerX10 said:
maybe you can find one for the SD/IO port ?
DLD
Click to expand...
Click to collapse
Thanks but I don't particularly like the idea of stuff sticking out of my sd ports. Besides, (micro)SDIO products are few and far between. They never should have removed it because infrared is still used in a number of different appliances which could double your phone as a remote control. As far as I know, it doesn't take up battery life whilst idle (unless you set it to constantly watch for incoming beams?)...
I sure hope their next phone reintroduces it.

forcedalias said:
Thanks but I don't particularly like the idea of stuff sticking out of my sd ports. Besides, (micro)SDIO products are few and far between. They never should have removed it because infrared is still used in a number of different appliances which could double your phone as a remote control. As far as I know, it doesn't take up battery life whilst idle (unless you set it to constantly watch for incoming beams?)...
I sure hope their next phone reintroduces it.
Click to expand...
Click to collapse
Don't like stuff hanging out of mine either!
Sadly, I doubt very much you will see it return in future devices. The TyTn had one, but it's range was veeeery low, just a couple of feet. I have the feeling it's like floppy discs getting as rare as hens teeth.
Mike

Welcome "Industry trends"
Some fool decided that IrDA is a no-go and should be removed from laptops and hence from PDAs since Bluetooth has 100% penetration. Outlook for this was 2007, then pushed to 2008 and now they are talking about 2009... I know my company sells chips with IrDA support for laptops coming out on 2008/9... there is still demand but probably the chipset used for the P4550 does not support FIR (IrDA) anymore...

I am in search for a new device to replace my BlueAngel and have had a look at the TyTn II as well as the P6500 but I am very disapointed to find out that the IrDA is no longer available in the new HTC units. I am using the Ir for several devices like my other phones, Polar sports watch, dive computer etc. so for me the Ir is an essential feature.
Are there any way to get this working, I have not found any external units to connect to the TyTn via mini USB. (Even though I would hate have to have some contraption hanging out of the device.)
As of now I might start consider leaving the HTC-land after 6 years with their fantastic products.
/Ronny
( - Wallaby - Blue Angel - Atom - )

Just wondering if anyone has found a solution/accessory for this lack of IrDA port? I have a Touch Cruise which also lacks a IRDA (Gee thanks HTC). I need to get it to talk to my Polar S625x watch. Anyone found a miniUSB IRDA device?
Thanks

OK, I have read a bunch of posts on the lack of IR abilities and how the Tilt uses BT to beam. I just sent a file from the Tilt to my Hermes via BT and it took about 10 seconds. I enabled IR on both devices and aligned the IR port on the Herm towards the left side of the Tilt and it gave the option to beam, I beamed the same size file and it took less than a second. I am not sure I understand, I repeated the test 3 times with the same result. Any ideas?

has anyone tryed this?
http://www.ameri-rack.com/APA-TFC1m.html
Its a sd to microsd port so you can fit into your sdio irda into your phone. its gona be pretty big but at least that is an option...

External Camera

I'll cut to the chase and save the boring details for the next paragraph: I want an external SDIO camera connected to my Tilt so I can record videos on bike rides. I've searched high and low, and I have a few products in mind. Can anyone tell me if they know of better products?
What I need:
- An SDIO camera which will work on the Kaiser
- An SDIO (standard SD size) to MicroSD cable/adapter (if microSD SDIO cameras do not exist)
- A way to hook up both a microSD card and the camera (if possible)
- A good shell to keep my Kaiser injury free when (and if) I take a spill
- Any other suggestions are welcome.
What I've found:
On Bluetooth Cameras:
So far I've found absolutely nothing in the way of Bluetooth Camera modules (except the following college research paper and patent application by Kodak) so I might be jumping the gun with Bluetooth, but here they are:
http://www.itn.liu.se/~shago/Exjobb/BT_Webcam.pdf [college research pap]
http://www.engadget.com/2006/04/02/kodaks-bluetooth-camera-module/ [engadget on kodak patent]
On MicroSD SDIO Camearas:
I have found nothing on this subject. If there are any microSDIO cameras that you are aware of or are around PLEASE PM, e-mail, reply, call or IM me!
On SDIO camera modules I've found the following:
- HP Photosmart Mobile Camera
This is for an iPaq with Windows PocketPC 2002 or Windows Mobile 2003. It takes video, but will it work on a Kaiser, considering it's a WinMo6 device? It looks like a good option.
http://h10010.www1.hp.com/wwpc/pscmisc/vac/us/en/sm/pocketpc/FA185A_specifications.html
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=534595&SiteID=1 [this link suggests that it works fine under winmo5 and is even usable via camera APIs using some discontinued Veo camera APIs]
- eNnovation (LifeView?) FlyCam SD
For this one I have similar fears that some of the prerequisites are not satisfied by the Kaiser. Specifically they list the following:
CPU : Intel Xscale
OS : Microsoft Pocket PC 2000, Pocket PC 2002 and Pocket PC 2003.
The age of the OSes listed and the CPU requirement make me shy away from this one, although the HP seems just as bad when it come to support for WinMo.
http://www.ennovationtech.com/html/flycamsd.htm#F
http://www.msdner.com/dev-archive/144/11-35-1446805.shtm [this link suggests lifeview makes it and there's winmo5 support and an sdk, but the lifeview site is down.]
- Pretec SDIO 1.3MegaPixel Camera
This little card is just another one of the ones I've found. This one says Win PPC 2002 and higher, so I'm guessing it implies WinMo5&6 support, but that's a crap shoot. This camera also features 20fps max depending on resolution while the above two sport 30fps. Not my top choice.
http://www.pretec.com/epages/Store....s/Store.Pretec/Products/OS-CAS#Specifications
http://www.jactron.co.uk/pretec/io/sdio/sd-smartcam.htm
- Veo SDIO Camera
A lot is mentioned about these cams, but they seem to be discontinued and I am unable to find a place to purchase any of these. Would these be better suited? Anyone own one?
- Spectec SDIO Camera
This camera seems to be a 640x480 only discontinued model also. There is a chance that these do not work well with WinMo5/6 at all.
http://www.mobileplanet.com/p.aspx?i=121109 DISCONTINUED
On SD to MicroSD adapters/converters/cables:
I couldn't find any. The closest thing I found was a post on MoDaCo linking to an SD to MiniSD solution. I also found a camerahacker.com post on detailed images which show the pins are pretty much 1-1. I would also like to thank Chainfire who told me this fact ahead of time on IRC in #xda-devs. Additionally, there seems to have been an April Fool's joke about SanDisk making an SD to MicroSD adapter on another PPC device forum. Thanks to them I nearly soiled myself. I am highly inclined to create my own adapter, but feel free to save my time if one exists or is in development.
http://www.camerahacker.com/Digital/Inside_miniSD_Adapter.shtml [CameraHacker post describing pinouts with pics]
http://www.modaco.com/content/Windo...o-purchase-or-make-an-sd-to-microsd-adapter-/ [MoDaCo post related to this same endeavor]
http://www.diatec.co.jp/shop/det.php?prod_c=460 [Japanese site with an SD to MiniSD solution]
On Connecting Both SDIO Device and MicroSD/SD Memory Card
I have not found any information on any device capable of allowing this sort of chaining an SDIO card with an SD card. I did find a WiFi card and a GPS card which allow a pass-through to a microSD card. None of the cameras listed above had this capability listed, and I did not see it in any of the pictures (although I could have missed it?).
On Protective Cases
I found two suitable solutions for this, and I'm leaning toward BoxWave's Armor Case as it has a screen cover as well. They're both around $30.
http://www.boxwave.com/products/armorcase/armor-case-at_t-tilt_2906.htm [BoxWave's Armor Case]
http://www.tiltdepot.com/a/att-tilt-metal-cases/monaco-aluminum-case-_4-23--3294.htm [Monaco Aluminum Case]
So far this is what I've got, and the idea is that I would mount the camera in my helmet, connect the SDIO connector to a cable that runs to my pocket where it converts to MicroSD and plugs into my Kaiser. I would like to get this project together so I can record some videos of upcoming rides. If you know of any better suited products or shortcuts that I can take please reply!

notten:
Here is something I've been looking at to record videos on bike rides.
http://www2.oregonscientific.com/shop/product.asp?cid=0&pid=709&scid=86
The big drawback is all the reviews say the video quality is not very good..

Using your 'Kaiser' as the recorder for video I would have thought is a little impractical.
Firstly the mini-SD card is not SDIO compatible even if you could get an adapter. Secondly, you have to find some way of protecting both camera and phone. Thirdly, any wireless connected camera (BT or WiFi) will be of low quality due to transmission rates/resolution restrictions (Check out my thread on connecting a Linksys network camera with peer to peer).
I advise you to Google 'Sports video camera' as there are some good packs out there. Then you can convert the video at a later date for viewing on any device.
Not really the answer you wanted but someone else may come up with something.

The microSD slot not being SDIO is slightly disappointing. Are you sure about this? I wanted to have the phone record GPS along with video, so standalone devices wouldn't really do the trick. Thank you both for your replies. So far it's not what I wanted to hear.
Additionally I cannot find any of the cameras I listed except the HP on sale anywhere. The HP Photosmart camera can only take pictures through an SDK which makes the whole project even less viable.
Are you certain the Kaisers don't support SDIO over the microSD slot?

My bet, and this is a gut instinct, is that none of those camera's will work under WM6. Wasn't the processor and achitecture different on the PPC systems to the newer WM6 hardware? I seem to remember programs came in XScale, ARM and other versions depending on the processor your device carried so it would stand to reason that something designed for a XScale processor wouldn't be to happy with an ARM processor. Course I could be way off base here!
The fact that so many phones, PDA's etc these days come with built in WiFi, Camera's, Bluetooth etc would make the market for add-on devices such as this rather small and its unlikely people would waste their R&D time building something for a rather small market place.
How about something like these?
www.helmetcamera.com
www.helmet-cameras.com

OK, now I know I am pushing the envelope here but Coreplayer have said that they have solved the Qualcomm driver issue for streamed video and that the upcoming version (1.2) of Coreplayer works perfect with the 'Kaiser'.
I would bet that if you can find a 'Rugged' housing for any Linksys camera with reasonable resolution, you can have a good peer-to-peer link in your pocket!!!
Hey! wishful thinking for the New Year???
OH, one thing you have to remember on ANY camera setup! How do you record.....

Honestly, I hope you are correct. I will definitely try the Linksys camera if Coreplayer delivers the updated punch to the video streaming. When it does I will come bug you to test the Linksys camera. With good video it's likely to be my solution. Also, I have a very good buddy who might help me fab an aluminum enclosure for the camera.

notten said:
Honestly, I hope you are correct. I will definitely try the Linksys camera if Coreplayer delivers the updated punch to the video streaming. When it does I will come bug you to test the Linksys camera. With good video it's likely to be my solution. Also, I have a very good buddy who might help me fab an aluminum enclosure for the camera.
Click to expand...
Click to collapse
Well the Linksys WVC54G I have is only a poxy 320x240 cam but as I said in the thread, if you can find a Linksys cam with good resolution it should have the same stream available.
OK, I know Crimble is coming up but I will try to set up a 5V portable supply and test this out for you.....(only cause it looks like I'm doin summat good but you have me REALLY interested now for myself, SMILES).
EDIT; How often do we need GPS waypoint ties to vid recording do you think?? (Soz, brain running on...)

A qvga camera will do for me, but the VWC is just way too large. I don't think I can get those to comfortably stay on a helmet without looking outrageously falmboyant.
If there's anything in 640x480 that will stream to TCPMP and fit on a helmet I'm buying it. What exactly is this Crimble? I couldn't find anything on it, but I'll try to build a portable power supply myself if necessary.
As to the GPS waypoints on video: I'm looking to record cool rides and have the playback showing my location. I think I might've unknowningly stolen the concept from Indy 500, which sends some sort of local positioning system for the camera overlays they do with the races. I wonder what else could benefit from this.

notten said:
A qvga camera will do for me, but the VWC is just way too large. I don't think I can get those to comfortably stay on a helmet without looking outrageously falmboyant.
If there's anything in 640x480 that will stream to TCPMP and fit on a helmet I'm buying it. What exactly is this Crimble? I couldn't find anything on it, but I'll try to build a portable power supply myself if necessary.
As to the GPS waypoints on video: I'm looking to record cool rides and have the playback showing my location. I think I might've unknowningly stolen the concept from Indy 500, which sends some sort of local positioning system for the camera overlays they do with the races. I wonder what else could benefit from this.
Click to expand...
Click to collapse
Ahh... Crimble is my home location's (Yorkshire, England) acronim (you know, you use those in the US) for Christmas!....
Just buying a camera and using it is not in the 'METHOD' of XDA, if we can get it to work, WELL, then we take the guts and suit it to our purpose. If I can't do the hardware, I am sure somone else will look into that. One task at a time...Lets get a good image with GPS tags...

Diamond CAN READ external SD cards!

According to HTC service manual http://forum.xda-developers.com/showthread.php?t=410653 (picture attached) there are somewere an Y cable and SD card reader !!!!

Topic exists, fella.

So the Diamond has USB Host?
Surur

Riel said:
Topic exists, fella.
Click to expand...
Click to collapse
If you mean THIS http://forum.xda-developers.com/showthread.php?p=2311863 topic doesn't look the same to me, if I missed some other topic... please point out and I will join

surur said:
So the Diamond has USB Host?
Surur
Click to expand...
Click to collapse
Till now we just proved the existence of a working SD card reader-cable connected.
Special reader? Special Cable? According with HTC service manual no special software is needed, so the solution is in the HW

MAKE A SMALL Diamond like microsd card reader?
people get some entrepreneurial spirit 3 million diamonds are going to be sold
know some manufacturer which can make it for $10 a piece and you sell it for $49, YOU SELL 250K, YOU MADE over $10 MILLION, theres a life.
or VIEW THIS! http://www.tca-inc.net/usbmatousbbf.html and http://www.bizrate.com/memorycards/oid796436093.html
will that work?

Another USB reader
Check this out.
http://www.netimes.com/shop/miniusb-smart-cable-charger-microsd-card-reader-gray-p-1097.html
Nice prices, altough shipping will be put on the price.

I almost hate to ask, but has anyone actually tried plugging in a card reader or USB drive?

If someone managed to cram the features of the smart cable into the space made by the extended battery back cover, we'll have a neat little extension to the phone

Bringing up an old topic.... But just for the info here it is:
I worked with it many times. It can read the SD card but only in special conditions. You cannot use it as a USB host and read-write files etc.
The cable is a special cable so don't bother look for a ready made one commercially.
Regards!

i think its purpose is for service only
CMIIW

i think its purpose is for service only
CMIIW

I think the SD Card reader in the picture is simply a USB OTG Bridge that can transfer data to USB client devices.
Here is a similar product:
http://www.everythingusb.com/sima_hitch_usb-101.html

Forget hitch, the reader is a plain card reader.
And yes it is used for servicing only.
I could go into further details later if you want or even show how to build one.

Is there something useful here?
http://forum.ppcwarez.org/viewtopic.php?f=51&t=58813

Hm... Have no idea, didn't tested it.

leosedf said:
Forget hitch, the reader is a plain card reader.
And yes it is used for servicing only.
I could go into further details later if you want or even show how to build one.
Click to expand...
Click to collapse
if that's a plain card reader, it means the Diamond is an USB host or OTG device, right?
if that's true, we could provide an external 5v power to the card reader, and connect card reader's D+ and D- pins to Diamond to get it work, right? ... is it required to connect the both sides' Vcc and Gnd pins? Or, maybe the external power is not required?
thanks,
jeffrey

It will only work for servicing purposes. Nothing else. About the connections you are right.

I see. So it's useless for the rest of us.
Thanks,
Jeffrey