I will answer my own question.... After looking at the circuit diagram I see that there is no 5V supply to the USB port for the mini USB connector. I know that this is normally for a host to supply and power the beagle via but I am plugging in a device to BE powered. So the solution is to divert power from the 5V DC jack to the USB_DC rail. This can be done near the TPMS chip by connecting the 5V side of C2 to the USB_DC side of C1. That will do 2 things ; 1 supply 5V to the USB connection 2 indicate to the AM335x that there is volts on the port so it can wake up and operate. Also shorting pins 4&5 of the mini USB socket forces the port into Host mode. Devices can now be hot plugged and recognised. Yay. Maybe this will help someone one day. Regards Marc
On Thursday, April 17, 2014 11:01:27 AM UTC+1, [email protected] wrote: > Hello > I have finally managed to get my hands on an BBB and started to try and > get my system up and running the way I need by building a kernel (3.14.1). > > I am attempting to use the USB client port (USB0) in host mode and think I > have done all the things necessary to get this working: > > Kernel config has EHCI enabled and set to host only > Hardware mod on the board to short pins 4&5 of micro socket to force > USB-ID low to indicate host mode. > Changed the arch/arm/boot/dts/am335x-bone-common.dtsi file to put it into > host mode > usb@47401000 { > status = "okay"; > dr_mode = "host"; > }; > usb@47401800 { > status = "okay"; > dr_mode = "host"; > }; > > No matter what I plug in nothing gets identified ??? > > Plugging into the USB1 host port is fine so the kernel is configured > correctly. > > > Boot log shows ports being identified: > [ 2.057294] musb-hdrc musb-hdrc.0.auto: MUSB HDRC host driver > [ 2.063996] musb-hdrc musb-hdrc.0.auto: new USB bus registered, > assigned bus number 1 > [ 2.072673] usb usb1: New USB device found, idVendor=1d6b, > idProduct=0002 > [ 2.079868] usb usb1: New USB device strings: Mfr=3, Product=2, > SerialNumber=1 > [ 2.087467] usb usb1: Product: MUSB HDRC host driver > [ 2.092722] usb usb1: Manufacturer: Linux 3.14.1 musb-hcd > [ 2.098402] usb usb1: SerialNumber: musb-hdrc.0.auto > [ 2.104856] hub 1-0:1.0: USB hub found > [ 2.108880] hub 1-0:1.0: 1 port detected > [ 2.117574] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver > [ 2.124275] musb-hdrc musb-hdrc.1.auto: new USB bus registered, > assigned bus number 2 > [ 2.133045] usb usb2: New USB device found, idVendor=1d6b, > idProduct=0002 > [ 2.140253] usb usb2: New USB device strings: Mfr=3, Product=2, > SerialNumber=1 > [ 2.147851] usb usb2: Product: MUSB HDRC host driver > [ 2.153105] usb usb2: Manufacturer: Linux 3.14.1 musb-hcd > [ 2.158786] usb usb2: SerialNumber: musb-hdrc.1.auto > [ 2.165268] hub 2-0:1.0: USB hub found > [ 2.169312] hub 2-0:1.0: 1 port detected > > Any ideas ??? > > Thanks > marc > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
