OK its working, decided to play safe, so everything is on jumpers ;-)
<https://lh3.googleusercontent.com/-niRy0jgKcko/Wi3I7Cqd6XI/AAAAAAAAAhk/m2ynkiWOVH8dFWWptrhLrzWsFLSoeftTQCLcBGAs/s1600/Jumpers.jpg> Le dimanche 10 décembre 2017 17:37:50 UTC-5, William Bain a écrit : > > I have had it running almost like this (but with just a wire in place of > the USB power switch module) for a few hours each day for the last couple > weeks or so, and haven't let the magic blue smoke out of my device yet! I > plugged a wi-fi dongle into the added USB jack, and the dongle gets pretty > hot to the touch, but it works fine and the heat doesn't seem to cause any > problems. Haven't tried controlling a camera with it yet. > > -- Will > > On Sun, Dec 10, 2017 at 2:08 PM, Graham Haddock <[email protected] > <javascript:>> wrote: > >> Works fine. As long as power/Vusb is on Vi (P1-pin 7) >> --- Graham >> >> On Sun, Dec 10, 2017 at 12:18 PM, Patrick Poirier <[email protected] >> <javascript:>> wrote: >> >>> Hello, I am planning to use this setup, Have you successfully >>> implemented and completed tests ? >>> >>> Regards >>> >>> >>> Le vendredi 17 novembre 2017 13:11:59 UTC-5, [email protected] a >>> écrit : >>> >>>> Graham -- >>>> >>>> Thanks for the advice! That totally makes sense. I now intend to try >>>> this configuration to get the added USB1 working in host mode (e.g., to >>>> control a Sony camera using the gphoto2 library): >>>> >>>> >>>> <https://lh3.googleusercontent.com/-lu0aOUP8tbc/Wg8Z3vezBxI/AAAAAAAAAUQ/ud2QXK4zW9gwIhrqVif5ChtTqCcqjDicQCLcBGAs/s1600/PocketBeagle_microUSB_3.png> >>>> >>>> These USB power switch ICs (e.g., Diodes Incorporated AP2822AKATR-G1, >>>> Richtek RT9711CGB, >>>> Richtek RT9742JNGV) limit current, prevent reverse current, etc., and >>>> cost less than a dollar. I'll report back about whether this ends up >>>> working okay. >>>> >>>> -- Will >>>> >>>> >>>> On Thursday, November 16, 2017 at 5:10:48 PM UTC-7, Graham wrote: >>>>> >>>>> Your first connection does not work, because you are trying to power >>>>> the USB1 from the USB_VIN, but since the is no power going into USB_VIN >>>>> on >>>>> USB-0, there is no power to come out USB-1. >>>>> This only works when the board is powered from USB-0 >>>>> The schematic does not tell you, but USB_VIN, USB0_VIN and USB1_VIN >>>>> are all connected together. >>>>> >>>>> VIN is a totally separate power supply input >>>>> >>>>> Since you are powering the board from VIN (P1-01) you need to hook the >>>>> 5V line on your Micro-USB board to P1-01 and P1-05. >>>>> >>>>> In this case, it will work, although you have no current limit >>>>> protection from a short on the 5V line in a downstream USB device, which >>>>> is >>>>> required by the USB spec. >>>>> So, only plug in USB devices and cables you trust. >>>>> >>>>> I would not power the USB-5V-VBUS from the SYS-VOUT, because SYS-VOUT >>>>> is limited to 0.2 A or so, and many USB devices draw more current than >>>>> this >>>>> (USB-2 devices are allowed to draw up to 0.9 A) >>>>> >>>>> --- Graham >>>>> >>>>> == >>>>> >>>>> On Thursday, November 16, 2017 at 5:11:52 PM UTC-6, >>>>> [email protected] wrote: >>>>>> >>>>>> I, too, am wondering about the best way to provide power to the board >>>>>> and to a device connected to USB1 as host. Here is how I learned to hook >>>>>> up >>>>>> a micro-b breakout to USB1 and also how I intend to provide power to the >>>>>> board. The problem is that there is no measured voltage at USB1: >>>>>> >>>>>> >>>>>> <https://lh3.googleusercontent.com/-XyHjxbobnnY/Wg3xGzyvNcI/AAAAAAAAATo/u1ufBwtum9c4KA6T6zjnu38x4cwwQ3TNQCLcBGAs/s1600/PocketBeagle_microUSB_1.png> >>>>>> >>>>>> I was wondering if I could just power the USB1 device from P1_24 SYS >>>>>> VOUT (which does have power when board is supplied by P1_01 SYS VIN) >>>>>> like >>>>>> this: >>>>>> >>>>>> >>>>>> <https://lh3.googleusercontent.com/-l4RYr7WmaGU/Wg3xqYECajI/AAAAAAAAATw/ipK3CZmhG18cieC-bnMLV04PfPBl_hRRACLcBGAs/s1600/PocketBeagle_microUSB_2.png> >>>>>> Would it be harmful to do it this way? Are there better ways to >>>>>> accomplish this? Thanks! >>>>>> >>>>>> -- Will Bain >>>>>> >>>>>> >>>>>> On Sunday, November 5, 2017 at 6:59:39 PM UTC-7, Graham wrote: >>>>>>> >>>>>>> Further research, looking at the Eagle board and schematic files for >>>>>>> the PB, it appears that USB0.VIN and USB1.VIN are both directly >>>>>>> connected >>>>>>> to VIN.USB >>>>>>> Which explains why I had no power on my USB1 host port when >>>>>>> connected like the Fritzing diagram, since I am powering from VIN >>>>>>> currently. >>>>>>> >>>>>>> So the question becomes,,, >>>>>>> What is the best way to power USB1 VBUS as a host if I don't know in >>>>>>> advance whether the customer application will run from VIN or VIN.USB? >>>>>>> >>>>>>> --- Graham >>>>>>> >>>>>>> == >>>>>>> >>>>>>> On Sunday, November 5, 2017 at 6:58:06 PM UTC-6, Graham wrote: >>>>>>>> >>>>>>>> I note that there is a PocketBeagle pin P1-7 named USB1-VIN. >>>>>>>> >>>>>>>> I don't find any connection on the PB schematic, other than to P1-7. >>>>>>>> >>>>>>>> It was connected externally in all of the USB1 host discussions and >>>>>>>> Fritzing diagrams. >>>>>>>> >>>>>>>> The name would imply that it is a way to deliver power to the board >>>>>>>> when USB1 has an external 5 Volt power source. >>>>>>>> >>>>>>>> I guess the basic question is whether this needs to be >>>>>>>> used/connected when USB1 is functioning as a host. >>>>>>>> >>>>>>>> --- Graham >>>>>>>> >>>>>>>> == >>>>>>>> >>>>>>> -- >>> 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/SWNBrgsjIeA/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected] <javascript:>. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/d3044b29-28b0-4b78-8dbd-5fe7d845206a%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/beagleboard/d3044b29-28b0-4b78-8dbd-5fe7d845206a%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> 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/SWNBrgsjIeA/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/CANN_KV50ckeZpdMubC9WdiTgdbf4fuozoFUumU72x0rzLh9rNg%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/beagleboard/CANN_KV50ckeZpdMubC9WdiTgdbf4fuozoFUumU72x0rzLh9rNg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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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