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2009-09-23
, 21:40
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Posts: 243 |
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Joined on Aug 2009
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#312
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I understand and agree about the facts that many won't need it, and that if officially supported it would bring who knows how many complaints; thx also for the numbers. (I didn't know it was you who created the host mode script, nice work! ^^)
Personally I can't say it's something vital which I'll surely use everyday; it's a feature more that I knew previous models have, which I find cool and/because I imagine it can be very useful in many situations. Not to have that possibility lowers a bit the value for money I was earlier giving to the device, which made me post in search for a solution in this thread.
That doesn't mean I don't find it an exceptional device anymore; I could still find it interesting enough to get it.
But if it only had...
Lets discuss back in search for a possible solution please... or wait for the device/some news...
Unless somebody has a prototype of the N900 and wants to share info or try dangerous (?) testmode scripts, both of which I don't really see happen, we can only wait for the N900 to be on the market.
Meanwhile, somebody can always have alternative ideas..
Personally I can't say it's something vital which I'll surely use everyday; it's a feature more that I knew previous models have, which I find cool and/because I imagine it can be very useful in many situations. Not to have that possibility lowers a bit the value for money I was earlier giving to the device, which made me post in search for a solution in this thread.
That doesn't mean I don't find it an exceptional device anymore; I could still find it interesting enough to get it.
But if it only had...
Lets discuss back in search for a possible solution please... or wait for the device/some news...
Unless somebody has a prototype of the N900 and wants to share info or try dangerous (?) testmode scripts, both of which I don't really see happen, we can only wait for the N900 to be on the market.
Meanwhile, somebody can always have alternative ideas..
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2009-09-23
, 22:03
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Moderator |
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Joined on Oct 2007
@ Vancouver, BC, Canada
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#313
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Originally Posted by thecursedfly
Sorry, where are these testmode scripts?
... try dangerous (?) testmode scripts...
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Thank you all for your donations!
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2009-09-23
, 22:19
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Posts: 243 |
Thanked: 198 times |
Joined on Aug 2009
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#314
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Originally Posted by qole
I guess they still have to be coded by somebody capable of doing it.. (not pushing anybody! but maybe there's somebody capable and interested in doing it)
Sorry, where are these testmode scripts?
Last edited by thecursedfly; 2009-09-23 at 22:22.
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2009-09-23
, 23:03
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Posts: 224 |
Thanked: 107 times |
Joined on Aug 2009
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#315
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Anybody have experience puting together a bounty for this sort of thing? I'd chip in $20 to anyone who would develop a patch that gave the N900 full host mode or at least OTG capabilities without a hardware mod (aside from a special cable, perhaps).
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2009-09-23
, 23:05
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Posts: 305 |
Thanked: 154 times |
Joined on Aug 2006
@ Colorado
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#316
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Originally Posted by Mara
So use an emulated VBUS to tell the chip to go into TESTMODE-Force_host?
Take a look at page 167 where they talk about emulating the VBUS signal... this may be more "clean" method of trying to get the controller into host mode?
Also, when I read the document it is apparent that the OMAP USB pins are not designed to be connected directly to the USB port. It needs some tranceiver chip between. I'm not sure if there are any other limitations on that tranceiver chip that prevent the host mode from working? (I don't think so, but you never know...)
I have only short bursts of time to work on things like this. Can someone read page 167-169 and figure out what this is saying and how to send a message on an emulated VBUS?
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2009-09-24
, 13:11
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Posts: 3,397 |
Thanked: 1,212 times |
Joined on Jul 2008
@ Netherlands
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#317
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Nobody interested in helping BruceL? The document is http://focus.ti.com/lit/ug/sprufd4b/sprufd4b.pdf
With USB OTG on microUSB the microUSB-B is always the EH, and the microUSB-A the OTG. The Nokia N900 has a microUSB-B connector; not microUSB-AB connector. Because of this it can only function as EH; not OTG. See http://en.wikipedia.org/wiki/USB_On-...TG_Micro_Plugs and http://en.wikipedia.org/wiki/Univers...-AB_Socket_OTG (the PDF linked to earlier mentions this as well). So you would either need to hack USB on both devices, or get a microUSB-AB plug on the Nokia N900. Or do you think grounding that one pin would work? Even so, you'd then have a microUSB-B to microUSB-B link.
With USB OTG on microUSB the microUSB-B is always the EH, and the microUSB-A the OTG. The Nokia N900 has a microUSB-B connector; not microUSB-AB connector. Because of this it can only function as EH; not OTG. See http://en.wikipedia.org/wiki/USB_On-...TG_Micro_Plugs and http://en.wikipedia.org/wiki/Univers...-AB_Socket_OTG (the PDF linked to earlier mentions this as well). So you would either need to hack USB on both devices, or get a microUSB-AB plug on the Nokia N900. Or do you think grounding that one pin would work? Even so, you'd then have a microUSB-B to microUSB-B link.
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2009-09-24
, 14:12
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Joined on Mar 2006
@ Irving, TX
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#318
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Originally Posted by allnameswereout
I read a bit of those pages, and I don't really know how to "translate" it to simple commands. It seems the USB operation status is set by setting bits in a certain register, and it should do the trick. That register is also readable which should help on debugging/troubleshooting.
Nobody interested in helping BruceL? The document is http://focus.ti.com/lit/ug/sprufd4b/sprufd4b.pdf
With USB OTG on microUSB the microUSB-B is always the EH, and the microUSB-A the OTG. The Nokia N900 has a microUSB-B connector; not microUSB-AB connector. Because of this it can only function as EH; not OTG. See http://en.wikipedia.org/wiki/USB_On-...TG_Micro_Plugs and http://en.wikipedia.org/wiki/Univers...-AB_Socket_OTG (the PDF linked to earlier mentions this as well). So you would either need to hack USB on both devices, or get a microUSB-AB plug on the Nokia N900. Or do you think grounding that one pin would work? Even so, you'd then have a microUSB-B to microUSB-B link.
Also, the presence of Vbus normally tells if the device should be Host or Peripheral. But, this signal is not a direct input to USB controller. Tranceiver chip is the one to detect it which should output its status to the OMAP. After that it is purely a SW that does the rest. This is actually good news since it tells that there is no "hard wired" control to keep the USB controller in Peripheral mode. Just writing the correct bits to this USB register should make it into Host mode.
Sorry, I don't think I can figure out how to do this exactly, but for qwerty12 this should be a piece of cake...
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2009-09-24
, 14:13
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Thanked: 650 times |
Joined on Nov 2007
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#319
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Originally Posted by qole
Just assuming that I can pose for a moment that I don't have a Nokia Tablet (gave it to my wife
Ok, so there are some of you out there who want USB host mode but don't have tablets at the moment.
That's puzzling to me!
If you don't currently have a tablet, what mobile device are you currently using that does have USB host mode? And what do you use it for?
I completely disagree with that statement.
), I have a Sharp Zaurus - which has USB Host mode.And I want USB Host mode on the new device that I crave for - the N900.
And I use USB host mode for when I go on trips and take a lot of pictures and videos (large videos). WhenI get backt o the hotel room, I phug in my Camera and the portable HDD to the Zaurus - and copy all the media to the HDD as a backup and clean up the Camera media for the next day. In fact I do this for the whole group I go with - I am the chief Backup man.
Seriously now how do I do this with the N900 ?
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2009-09-24
, 16:18
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Joined on Mar 2007
@ Southern California
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#320
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Originally Posted by nilchak
I've been trying to follow this thread, but I often scratch my head at some of the use-cases that I'm hearing. In your case, removable media (SD, MMC, whatever) is so cheap now, why not take several with you and use the media itself as backup (i.e., for a 7-day trip, take 7 cards...)? And, if your camera uses microSD, why not just take the card from the camera and put it into the N900 to do the same thing? (If your camera uses regular SD, just slip a microSD card into an adapter.)
Seriously now how do I do this with the N900 ?
Yes, I know that there are valid reasons for USB Host mode, but in most cases, it just sounds like people want a way to (a) backup files, or (b) transfer/sync files. This can all be done via wifi, bluetooth, or USB (connected to a computer).
So... Maybe I'm missing something huge, but I just don't get the importance (for most normal users).
Tim
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| Tags |
| awesomeness in the works, boulevard of broken deals, host, i am the dealbreaker, inspector gadget lies, mobidapter is a scam, nokia fanbois, otg, over 9000, usb, usbcontrol |
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Not to say that for some this is a very important feature. But for 99% (?) of the folks it is not.
Also, you should not forget that the USB-OTG is not the same as full blown USB port that you see on PC's. OTG officially support 100mA current for the VBUS, where normal USB supports 500mA. Lots of devices need more than 100mA. In other words, many devices will not work with OTG port. (Like many memory card readers do not...) In that case you'd need external powered USB hub.
In my opinion the USB-OTG is more or less a niche. If it was supported and advertised feature on N900 box, guess how many unsatisfied customers there would be who say "my device doesn't work!", while they do not understand the difference between regular USB and USB-OTG?