I've been having great success with my new beagle board so far. Thanks
for all the great documentation and information. I have run into one
snag and would like to know if anyone else has seen this problem.
I've installed the Linux Angstrom distribution on a 2G SD/MMC card and
it boots just fine thanks to the great instructions.
I'm trying now to attach a USB mouse and keyboard through a powered
hub and so far have had no luck getting the USB subsystem to recognize
either of these devices. I've tried connecting only one device at a
time without the hub and still get no response.
I've taken care to use the USB mini-A to Standard-A connector
recommended here: http://www.vernier.com/accessories/access.html?usb-mini&template=basic.html
I've also used an ohm meter to make sure pins 4-5 are shorted as
required for a USB OTG host.
When Linux boots, the devices listed under /proc/bus/usb contain
root@beagleboard:/proc/bus/usb# cat devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 3
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 188.8.131.52-omap1 ehci_hcd
S: Product=OMAP-EHCI Host Controller
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
So it looks like there's an EHCI controller in my system. But no
devices registered on the bus.
I'm guessing that the mini-A connector is wired correctly and the OTG
function of the USB device is working.
I'm now wondering if this is a hardware problem with my Beagle (rev
B4) or possibly the connector is the wrong type for what I'm trying to
Would I have better luck if I connected to the powered hub using a
mini-A to mini-B connector.
Has anyone else had this type of problem?
BTW - I've also tried plugging the Beagle into a PC and it is
recognized as a device under WinXP - seems okay.
Thanks and I look forward to contributing to the project.