Hi, I have got BBB Rev C. I did it, but BBB died and I can't restore him((((
четверг, 18 декабря 2014 г., 21:37:28 UTC+3 пользователь shei...@gmail.com написал: > > Dear Ian, > > Did you able to convert USB0 Port in BBB to Host? If So, Can you explain? > I need to Convert Both the ports in BBB to Host. It is urgent. > > With regards > > Siddhiq > > On Wednesday, September 3, 2014 8:04:25 AM UTC+5:30, Ian Collins wrote: >> >> Has anyone made any progress with this? >> >> I'm in the same boat trying to get this work and realise we will have to >> add some hardware to provide the correctly timed 5V. It looks like the >> biggest problem is the DRVVBUS pin for USB0 isn't tracked. >> >> Thanks. >> >> Ian. >> >> On Wednesday, 12 February 2014 22:42:58 UTC+13, AndrewTaneGlen wrote: >>> >>> This guy seems to have had some success, with some minor hardware >>> modifications: >>> >>> http://pansenti.wordpress.com/2013/05/27/beaglebone-black-with-two-usb-host-ports-it-can-be-done-but-its-not-easy/ >>> >>> Andrew. >>> >>> >>> On 12 February 2014 20:18, Mahammad <cai...@gmail.com> wrote: >>> >>>> Hi There >>>> >>>> I am too trying to make the mini usb port to work as a host. >>>> >>>> I am trying to scan the expansion port signals it seams like none of >>>> the pins offers direct access to the processor vbus signal. Should I do >>>> this with some software? >>>> >>>> If with software; what time should it work to enable/disable the volt? >>>> And should it listen to the signal all the time or just during the port >>>> initialization stage? >>>> >>>> Best Regards >>>> >>>> Mahammad >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> On Wednesday, August 21, 2013 4:38:47 AM UTC+2, AndrewTaneGlen wrote: >>>>> >>>>> Understood. Thanks for taking the time to clear that up for me. >>>>> >>>>> >>>>> Andy. >>>>> >>>>> On Wednesday, 21 August 2013 14:36:59 UTC+12, Gerald wrote: >>>>>> >>>>>> Yes, that is what I am saying. I did a design where the 5V was always >>>>>> there. It din't work. I had to add a power switch like I did on the BBB >>>>>> design. >>>>>> >>>>>> >>>>>> Gerald >>>>>> >>>>>> >>>>>> On Tue, Aug 20, 2013 at 9:33 PM, AndrewTaneGlen <andrewt...@gmail.com >>>>>> > wrote: >>>>>> >>>>>>> Thanks Gerald, >>>>>>> >>>>>>> That was one thing I was not absolutely clear on. The TRM has the >>>>>>> following passage concerning USB power control: >>>>>>> >>>>>>> "*When any of the USB controllers assumes the role of a host, the >>>>>>> USB is required to supply a 5V power* >>>>>>> *source to an attached device through its VBUS line. In order to >>>>>>> achieve this task, the USB controller* >>>>>>> *requires the use of an external power logic (or charge pump) >>>>>>> capable of sourcing 5V power. A* >>>>>>> *USB_DRVVBUS is used as a control signal to enable/disable this >>>>>>> external power logic to either source or* >>>>>>> *disable power on the VBUS line. The control on the USB_DRVVBUS is >>>>>>> automatic and is handled by the* >>>>>>> *USB controller.*" (AM335X TRM, pg. 1697) >>>>>>> >>>>>>> So are you saying, in addition to the above, that the USB port must >>>>>>> be in control of the VBUS enable - assumedly detecting the voltage as >>>>>>> off >>>>>>> when disabled, and on when enabled, with specific timing requirements >>>>>>> around these edges - so that there is no way to simply have the 5V >>>>>>> there >>>>>>> the whole time? >>>>>>> >>>>>>> If this is the case I guess there is a chance that I could add some >>>>>>> kind of gpio control through the expansion header to enable/disable the >>>>>>> 5V >>>>>>> rail as and when required (or I could just modify the board - but I'm >>>>>>> trying to avoid this and be able to just plug my clean BBB into my >>>>>>> horrible >>>>>>> looking base board...) >>>>>>> >>>>>>> >>>>>>> Regards, >>>>>>> Andy. >>>>>>> >>>>>>> On Wednesday, 21 August 2013 14:20:08 UTC+12, Gerald wrote: >>>>>>> >>>>>>>> Like the fact that the processor needs to see the 5V on >>>>>>>> the processor pin when it turns on the 5V? >>>>>>>> >>>>>>>> Take a look at the host port design. Both ports are actually OTG >>>>>>>> ports by design. To make the state machine in the HW function as a >>>>>>>> host, >>>>>>>> you need to make it work like the other OTG port, the one we call the >>>>>>>> Host >>>>>>>> port, which is configured for host.. >>>>>>>> >>>>>>>> >>>>>>>> Gerald >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Tue, Aug 20, 2013 at 9:12 PM, AndrewTaneGlen < >>>>>>>> andrewt...@gmail.com> wrote: >>>>>>>> >>>>>>>>> Hi All, >>>>>>>>> >>>>>>>>> I've been playing around with getting the mini-USB pc connector to >>>>>>>>> function as a second USB host (I'm using RCN's Ubuntu, Raring, but >>>>>>>>> I'd >>>>>>>>> assume this would apply to Angstrom as well). There is a post here >>>>>>>>> http://pansenti.wordpress.com/2013/05/27/beaglebone- >>>>>>>>> black-with-two-usb-host-ports-it-can-be-done-but-its-not-easy/ >>>>>>>>> decribing >>>>>>>>> how to do this with some hardware modifications, but looking at the >>>>>>>>> AM335x >>>>>>>>> technical reference manual it looks like I should be able to set USB >>>>>>>>> Port 0 >>>>>>>>> to function as a host through software alone (i.e. without needing to >>>>>>>>> ground the USB ID pin, or to modify anything else on the board). >>>>>>>>> >>>>>>>>> So what I have done so far is modify the 'am33xx.dtsi' file under >>>>>>>>> the 'usb_otg_hs' section, and change the item 'port0-mode = <3>' to >>>>>>>>> 'port0-mode = <1>', which, according to 'am33xx-usb.txt' in the >>>>>>>>> device tree >>>>>>>>> documentation, should force this port to function in Host mode. >>>>>>>>> >>>>>>>>> I then had a look through menu config, in the 'Device Drivers' -> >>>>>>>>> 'USB Support' section and there didn't seem to be anything >>>>>>>>> specifically >>>>>>>>> relating to setting the mode of any particular usb port, so I left >>>>>>>>> all of >>>>>>>>> this unchanged. >>>>>>>>> >>>>>>>>> Upon booting I can see that whereas previously I would get the >>>>>>>>> following wit regards to USB0: >>>>>>>>> >>>>>>>>> musb-hdrc musb-hdrc.0.auto: *** mode=3 >>>>>>>>> >>>>>>>>> I now get >>>>>>>>> >>>>>>>>> musb-hdrc musb-hdrc.0.auto: *** mode=1 >>>>>>>>> >>>>>>>>> This would appear to indicate that my device tree change had been >>>>>>>>> successfully applied, and the initialisation of USB port0 now looks >>>>>>>>> identical to that of port1. whereas previously they were quite >>>>>>>>> different. >>>>>>>>> >>>>>>>>> I then customised my USB cable to have an external 5V feed (wired >>>>>>>>> to SYS_5V on the expansion header) and added a female-female USB A >>>>>>>>> adaptor >>>>>>>>> to give me a host socket. >>>>>>>>> >>>>>>>>> However, it doesn't work. >>>>>>>>> >>>>>>>>> I have checked the power rail and can see 5V on R159 on the bottom >>>>>>>>> of the BBB and I have double checked that the comms wires are the >>>>>>>>> correct >>>>>>>>> polarity, and everything buzzes out as expected. >>>>>>>>> >>>>>>>>> The device boots, and I can SSH into it. Plugging a memory stick >>>>>>>>> into the standard usb host plug causes messages related to detecting >>>>>>>>> and >>>>>>>>> attaching a disk, but when I plug the same disk into the modified >>>>>>>>> connector >>>>>>>>> assembly I get noting at all. >>>>>>>>> >>>>>>>>> Taking out my change to the device tree returns the mini-USB >>>>>>>>> connection to normal functionality, i.e. providing a network >>>>>>>>> connection, so >>>>>>>>> it would appear that the hardware is all still in good working order. >>>>>>>>> >>>>>>>>> So I'm wonder if anyone else has had luck using the USB OTG >>>>>>>>> connection in host mode - without making any hardware modifications >>>>>>>>> to the >>>>>>>>> board? I all looks like it should work, so I'm guessing I've missed >>>>>>>>> something fairly basic. >>>>>>>>> >>>>>>>>> >>>>>>>>> Regards, >>>>>>>>> Andrew Glen. >>>>>>>>> >>>>>>>>> -- >>>>>>>>> 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 beagleboard...@googlegroups.com. >>>>>>>>> >>>>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>> 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 beagleboard...@googlegroups.com. >>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>> >>>>>> >>>>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "BeagleBoard" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/beagleboard/Mbaa5tsdfOk/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> beagleboard...@googlegroups.com. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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