Re: N800 USB Host Mode Experiment
 

Hi folks,

this is my first post in this great forum :) Sorry for my bad english, I'm not a native speaker.

I made everything described in the howto "USB Host Mode on N800" in the wiki:
http://www.internettablettalk.com/wi..._using_OS_2008

I've made a USB-female-to-female-adapter from two old usb-ports, soldering Pin1 to Pin4, Pin3 to Pin3, Pin3 to Pin2 and Pin4 to Pin1. Now I'm using the original Nokia cable to connect the N800 with the female-female-adapter. Then I switch the N800 manually to hostmode, but I'm not getting a 'USB device not Supported' message like described in the howto. But the N800 is powering the USB-Port now (I've measured 5V). When I connect a USB-Stick (I've tried several ones and two keyboards) the voltage on the USB-port drops to zero and no stick or keyboard is recognized.

dmesg -c

brings this every time I plug a usb-device in:

[ 330.046875] EAC mode: play disabled, rec disabled
[ 369.390625] musb_stage0_irq 570: VBUS_ERROR in a_wait _bcon (88, <AValid), retry #3, port1 00080108
[ 369.390625] tusb_source_power 629: VBUS a_wait_vfall, devctl 88 otg 114 conf c0000001 prcm 00a80500
[ 369.390625] tusb_source_power 629: VBUS a_idle, devct l 80 otg 184 conf c0000001 prcm 00a80500
[ 369.398437] tusb_source_power 629: VBUS a_idle, devct l 80 otg 184 conf c0000001 prcm 00a80500
[ 384.601562] EAC mode: play enabled, rec enabled

Has anyone an idea, why this is not working?

regards
Nighthawk

Re: N800 USB Host Mode Experiment
 

Whoa, don't do that! You just flipped all the wires... including connecting 5V and Ground in reverse (so -5V to your device). You should wire pin 1 to 1, 2 to 2, 3 to 3, 4 to 4.

Re: N800 USB Host Mode Experiment
 

... and you also need to solder pins 4 and 5 of the N800 end of the cable together.

Re: N800 USB Host Mode Experiment
 

My understanding is the he is making a USB A-female to A-female adapter - this only would have 4 pins - 5V, Ground, D+, D-

He will need to do the host mode switching manually.

Re: N800 USB Host Mode Experiment
 

Hi,

thanks for the answers.

I soldered them like you said, 1 to 1 and so on... Still the same behavior:

dmesg -c

[26970.367187] EAC mode: play disabled, rec disabled
[26994.984375] musb_stage0_irq 570: VBUS_ERROR in a_wait_bcon (90, <VBusValid), retry #3, port1 00080108
[26994.984375] tusb_source_power 629: VBUS a_wait_vfall, devctl 90 otg 154 conf c0000001 prcm 00a80500
[26995.046875] tusb_source_power 629: VBUS a_idle, devctl 80 otg 184 conf c0000001 prcm 00a80500
[26995.054687] tusb_source_power 629: VBUS a_idle, devctl 80 otg 184 conf c0000001 prcm 00a80500
[27012.031250] EAC mode: play enabled, rec enabled

Connecting 4 to 5 is not necessary, because I enable the hostmode manually.

regards
Nighthawk

Re: N800 USB Host Mode Experiment
 

I tried to connect my digital camera but I get an error: "unable to connect, no file system available". My usb flash key works fine, but neither of my digital cameras work. Anybody else seen that error?

Re: N800 USB Host Mode Experiment
 

It also happens to me.
I'm connecting a Canon Ixus 500 to my N800 with OS2008. It appears a USB icon at the top, but after a while I get "unable to connect, no file system available".
If I click the USB icon, it shows (grayed): "Connected to USB 2 Flash Media Device".

dmesg -c shows:
usb 1-1: Product: Canon Digital Camera
usb 1-1: Manufacturer: Canon Inc.
usb 1-1: device v04a9 p30b4 is not supported

I also tried with another CF Card, one newly formated and only with a few jpg's that my N800 can read with a Lifetech USB 2.0 8in1 Card Reader/Writer. No luck either.
I don't have another camera to try.

EDIT: I tried with a friend's camera (Olympus fe150/x730) and it works (same message about about file system, but it seems to be normal). I guess my Canon must have some sort of non-standard implementation not supported by the OS2008 kernel. Any one knows how to add support for Canon Ixus 500 / Powershot S500?

Re: N800 USB Host Mode Experiment
 

I'm especially interested in using a usb keyboard with the n800/os2008.
Is it correct that to do that either you force the connection to host mode as explained in #36, or change the wiring of the USB cable to get an automatic change to host mode? Furthermore does a device like a keyboard drain the n800 battery much, and if so do you need an extra power source?

Re: N800 USB Host Mode Experiment
 

Hi!
Din't try the soft option, but at this precise moment i'm using a PS2 keyboard to write this answer at my N800 (no USB keyboard to test, sorry). I just made my own cable (from two halves taken from two USB cables and with pin 4 soldered to pin 5 in the mini connector) and used a USB <-> PS2 Mouse + Keyboard adapter. I'm not using any sort of external power-source, just the N800 battery. The only problem I found is the Num/Caps leds not working (they blink whrn I connect, but after that they stay off).

Re: N800 USB Host Mode Experiment
 

apparently maplin's online shop stock control is entirely different from the high street shops, so, if you want one, ring a shop and ask!