higher capactiy for OTG port with external VCC

[Ronny Bismark]

Hi there,

I'm trying to add a second USB-Bus to the system because of the high amount of data.The OTG port would provide another Bus but has unfortunately not enough power to operate for example a webcam.

Therefore I want to use the OTG port as host and provide the Power from the J6 extension (Ground 5VDC and Ground). With $lsusb the device gets recognized but will not work which is probably cause to an internal powercheck. 

I found a post in a Gumstick forum to bypass this check:

 "After plugging in the device, run the following command: 
echo -n 1 > /sys/devices/platform/musb_hdrc/usb1/1-1/bConfigurationValue 
This disables the power limit enforcing. You may still get a warning 
in the system log, but the device should work. 
This has to be repeated every time the Overo is rebooted or the device 
is plugged in" 

but the suggested path doesn't exist on my pandaboard. Would be great if someone could give me a hint where to turn of the powercheck.

Used Kernel is from the ubuntu-omap4-extras (3.0.0-1205-omap4) 

Any help would be appreciated 

[David Anders]

Ronny,

please explain what you mean by "power from the J6".

are you trying to power the pandaboard via J6? or just the OTG port
via J6?

Dave

[Ronny Bismark]

Hi David, 

I want to use Pin1 (5VDC) and Pin4 (Gnd) to power a USB device which is connected to the OTG port (Webcam or something). Therefore I spliced up the  usb cable (adapter mini-A to standard female) and connect the red and the black wire to the J6 (pin1 and 4). 

Bye.