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Old 05-26-2012, 10:57 PM   #1
jacop
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is this possible?

Using a normal keyboard (for pc) to input words on k3 or kdxg? it seems that nook2 could make it by usb host. I have a k3 and like it to be a writing machine. Is this possible? thanks for any suggestions.
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Old 05-27-2012, 01:12 AM   #2
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Old 05-27-2012, 02:30 AM   #3
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Old 05-27-2012, 02:42 AM   #4
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Quote:
Originally Posted by jacop View Post
Using a normal keyboard (for pc) to input words on k3 or kdxg? it seems that nook2 could make it by usb host. I have a k3 and like it to be a writing machine. Is this possible? thanks for any suggestions.
Is it possible? Yes.
Was it solved in the thread linked to above? No.
Requirements:

A micro-USB Host cable (adapter) rather than the micro-USB Device cable.
(Look closely, that micro-USB connector has five pins, not four. It is the fifth pin that determines if the cable is Host or Device.)

The host-side kernel driver modules. If not already included in the kernel module build, they can be built and added to the collection of modules without re-building the kernel.

Note: Since the SoC does have USB ports in addition to the OTG port, the host-side modules are most likely already included in the module collection.

Like everything else on my side of the keyboard - it is on my to-do list.
But don't anyone go holding their breath for me to get around to doing it.

Consider this idea another "orphaned project" here, without anyone that has the time to do it. If you (any reader) have time, go for it.

Last edited by knc1; 05-27-2012 at 02:44 AM.
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Old 05-27-2012, 07:31 AM   #5
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I bought some of these cables (the cheap $0.99USD version without the LED), but I have not gotten around to getting them working yet.
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Old 05-27-2012, 08:08 AM   #6
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I bought some of these cables (the cheap $0.99USD version without the LED), but I have not gotten around to getting them working yet.
Round Tuits seem to be in short supply among the forum members here.
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Old 05-27-2012, 10:47 AM   #7
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Here is a relevant comment:
http://imxcommunity.org/profiles/blo...-kernel-config
"You may need to customize mx50_arm2_usb_set_vbus(bool enable) in arch/arm/mach-mx5/mx50_rdp.c, so that the OTG driver can turn on the VBUS when the peripheral is attached to the OTG port."

And another related thread:
http://www.mobileread.com/forums/showthread.php?t=47432

They mention a "self-powered hub" (with batteries) to connect multiple USB devices to the OTG port.

It looks like for the nook OTG hack, they flash a custom uImage file (linux kernel). Instead, we could use kexec to boot a uImage custom kernel file from the USB drive.

Here is a list of devices that work (and do not work) on the nook OTG:
https://docs.google.com/spreadsheet/...0OHFhSkE#gid=0

It seems that without external power, you cannot draw more than 100mA from the USB port, and some USB flash sticks need more than that.

The kindle would probably have the same limitations as the nook.

We might be able to add a USB sound dongle to a K4 with the OTG port.

Last edited by geekmaster; 05-27-2012 at 11:07 AM.
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Old 05-27-2012, 11:04 AM   #8
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Quote:
Originally Posted by geekmaster View Post
They mention a "self-powered hub" (with batteries) to connect multiple USB devices to the OTG port.
Great Advice, I forgot to mention that one -
Use a "powered hub" do not expect to be able to pull any power from the Kindle - it is a very low power device and probably not designed to power external USB devices. So power the devices with a "powered hub".
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Old 05-27-2012, 03:13 PM   #9
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The USB port on the touch can work as a host, right? I can imagine a small clip-on keyboard for the kindle touch now - It would be very handy
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