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The N900 is now 15 years old! (9)
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Sailfish OS for the Motorola Moto G7 Power (XT1955-5) - (ocean) (4)
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2007-12-07
, 14:21
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Posts: 42 |
Thanked: 10 times |
Joined on Apr 2007
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#92
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Originally Posted by Tirithen
I'm having the same problem.
I got my wireless USB keyboard working but it dropped a lot of characters until I added 5v from 4AA batteries...
I'm running OS2008 Beta and I've enabled host mode using the "echo host > /sys/devices/platform/musb_..." method (because I'm using a female-female adaptor, rather than a USB-OTG cable).
The keyboard is detected and "works", but drops a LOT of characters, making it unusable (worse than the repeating characters when using a BT keyboard... which was the problem I was trying to solve by going USB).
Is the only solution to supply power? Do other USB keyboards (mine is a KeySonic Nano) work correctly without power?
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2007-12-07
, 16:38
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Posts: 1,137 |
Thanked: 402 times |
Joined on Sep 2007
@ Catalunya
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#93
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Originally Posted by paratox
you need a mini b male to a female, not a mini a to a.
can anybody confirm this adapter works without switching?
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2007-12-07
, 17:24
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Posts: 227 |
Thanked: 51 times |
Joined on Feb 2006
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#94
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Originally Posted by Master of Gizmo
Extremely cool... I will be attempting to follow in your footsteps soon.
Hi,
this host mode support is really great. I just successfully used my i2c-tiny-usb (http://www.harbaum.org/till/i2c_tiny_usb/) to my n800. And with the libusb already pre-installed it was a matter of seconds to get the demo app running on the n800 and having it access the i2c-interface chips and do some LED blinking.
BUT: I have sporadic resets. Not only with my USB hardware but also with e.g. a prolific usb/rs232 converter. I don't even have to run my own drivers or so. A simple "lsusb" will at a 1/3 chance make the n800 reboot.
Has anyone experienced this as well?
I would try repeating the lsusb with a powered hub in place and seeing if your problem is related to current draw.
David
__________________
David Smoot
David Smoot
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2007-12-07
, 18:45
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Posts: 465 |
Thanked: 149 times |
Joined on Oct 2007
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#95
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Originally Posted by luca
Shouldn't the DVB-T device do most of the hard work (decoding) ?
I doubt the n800 has enugh horsepower to decode an mpeg stream at full resolution (though I'm used to satellite edit: and I know I have to transcode that, feeding the stream directly to the n800 doesn't work, maybe dvb-t with lower bitrate could work).
And usually these sticks draws a lot more power than the ~100mA that the n800 can supposedly deliver.
I've run hardware decoders before on really crappy hardware, they didn't tax the CPU at all, maybe these devices are different, though. *shrug*
They probably do use more power than the N800 can supply, but it's actually possible to deliver up to 200mA.
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2007-12-07
, 21:28
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Posts: 345 |
Thanked: 467 times |
Joined on Nov 2007
@ Germany
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#96
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Originally Posted by djs_tx
You are right, i should give a hub a try. But a) is my device really low power and draws really only a few milliamps b) should drawing even a few milliamps more not reset the n800 and c) is a self powered hub somehow spoiling the fun
Extremely cool... I will be attempting to follow in your footsteps soon.
I would try repeating the lsusb with a powered hub in place and seeing if your problem is related to current draw.
David
I have added a small section about my N800 experiments to my i2c-tiny-usb page at http://www.harbaum.org/till/i2c_tiny_usb . Just scroll down to the "Using the device with a Nokia N800" section.
P.S.: Where's the N810?? Can't wait to try this with the N810 ...
BTW: Did they add a micro AB receptable to the N810? Or do we face the same it-only-accepts-a-USB-B-plug problem again?
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2007-12-07
, 21:54
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Posts: 1,137 |
Thanked: 402 times |
Joined on Sep 2007
@ Catalunya
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#97
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Originally Posted by dblank
No, at most it will do the demuxing (taking out one mpeg stream from the whole mux, and some usb2.0 sticks won't do even that), mpeg decoding (the real hard part) has to be done in software.
Shouldn't the DVB-T device do most of the hard work (decoding) ?
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2007-12-07
, 22:19
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Posts: 53 |
Thanked: 7 times |
Joined on Nov 2007
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#98
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Originally Posted by Master of Gizmo
The N810 does contain a MicroAB port, but I have not been able to find a Micro-A to full-size B-plug or A-receptacle. Since Nokia does not officially support USB host in the tablets, we must wait for another device to support OTG Micro host so we can borrow those adapters. Until then we must use the same kludges used for the N800.
P.S.: Where's the N810?? Can't wait to try this with the N810 ...
BTW: Did they add a micro AB receptable to the N810? Or do we face the same it-only-accepts-a-USB-B-plug problem again?
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2007-12-07
, 23:03
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Posts: 465 |
Thanked: 149 times |
Joined on Oct 2007
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#99
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Originally Posted by luca
Wow, that sucks
No, at most it will do the demuxing (taking out one mpeg stream from the whole mux, and some usb2.0 sticks won't do even that), mpeg decoding (the real hard part) has to be done in software.
Is there *any* USB2 DVB-T card that also does hardware decoding?
Maybe some day we could actually use that currently useless IVA processor in the tablets for things like this
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2007-12-07
, 23:16
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Posts: 437 |
Thanked: 90 times |
Joined on Nov 2006
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#100
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Originally Posted by luca
Oh yeah, I wonder how I missed that
you need a mini b male to a female, not a mini a to a.
excuse my poor english, i`m austrian.
Last edited by paratox; 2007-12-07 at 12:28.