From: Gerald Coley <ger...@beagleboard.org> Reply-To: <beagleboard@googlegroups.com> Date: Friday, May 2, 2014 at 10:01 AM To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> Subject: Re: [beagleboard] Two BBBs have broken down, is there any mistake in my circuit board?
> These GPIO pins are dedicated to the LEDS. They do not go to the expansion > headers. > > Gerald > You could move the USR0..3 functions to other GPIO on the expansion headers by modifying the device tree. Look at arch/arm/boot/dts/am335x-bone-common.dtsi Regards, John > > > On Fri, May 2, 2014 at 11:25 AM, <uguryi...@gmail.com> wrote: >> Hi, >> >> OK i solved the 3.3V problem with a load switch, thanks again. >> >> One more thing, i put the BBB inside a box and need to check the power led >> without open the box. So i'm trying to move the BBB's power led outside of >> the box. >> >> I find the pins of user leds in the BBB_SRM; >> >> USR0 --> GPIO1_21 >> USR1 --> GPIO1_22 >> USR2 --> GPIO1_23 >> USR3 --> GPIO1_24 >> >> But I didn't find the GPIO pins in Expansion Header of P9 pinout and P8 >> pinout. Is there any additional source which can i look? >> >> Thanks, >> Ugur >> >> >> On Thursday, May 1, 2014 4:58:17 PM UTC+3, Gerald wrote: >>> Just follow the link I sent. Do what ir says in whatever manner you choose. >>> If you put 5V into P9-5 and P9-6, the board will be powered on, unless you >>> press the power button causing it to power back down. >>> >>> Gerald >>> >>> >>> >>> On Thu, May 1, 2014 at 2:15 AM, <ugur...@gmail.com> wrote: >>>> Hi, >>>> >>>> Thank you for your reply. >>>> >>>> Headers; >>>> J1-J2-J3-J4-J5-J6-J7-J8-J18-J19-J20 / headers of valves, >>>> J17 / header of pump, >>>> J12-J13 / headers of digital input, >>>> J9-J10 / headers of 12 volt and ground, >>>> J14 / header of analog input. >>>> >>>> Grounds are not tied together because high current switch is occur in our >>>> valve circuit. We separate 12 volt's ground and 5 V's ground. >>>> >>>> AIN4 and AIN6 pins voltage comes from analog sensor. They are certainly >>>> less than 1.8 volt. >>>> >>>> Could i use a load switch to solve the problem (The 3.3V cannot come up >>>> before the processor comes up) ? >>>> And is there any problem to give voltage(5 Volt) to P9_5 and P9_6 while >>>> it's turned off? >>>> >>>> Thanks, >>>> Ugur >>>> >>>> >>>> >>>> On Tuesday, April 29, 2014 6:09:52 PM UTC+3, Gerald wrote: >>>>> I see lots of issues. Can you show what you have connected to what on your >>>>> headers? >>>>> >>>>> Your 3.3V and 5V rails are on all the time. I suggest you take a look at >>>>> the SRM to see how to handle the power. The 3.3V cannot come up before the >>>>> processor comes up. You are violating that rule. >>>>> http://www.elinux.org/Beagleboard:BeagleBoneBlack#Expansion_Header_Usage >>>>> <http://www.elinux.org/Beagleboard:BeagleBoneBlack#Expansion_Header_Usage> >>>>> >>>>> Any reason your grounds are not tied together? >>>>> >>>>> What voltage do you have coming into the AIN4 and AIN6 signals? >>>>> >>>>> >>>>> Gerald >>>>> >>>>> >>>>> >>>>> On Tue, Apr 29, 2014 at 9:54 AM, <ugur...@gmail.com> wrote: >>>>>> Hi guys, >>>>>> >>>>>> I run 12V valves(insulated channels) and read pressure values by I2C with >>>>>> my BBB board. I don't understand what has happened but two BBB were broke >>>>>> down with this board. >>>>>> >>>>>> When i am plugging in my power supply; one of the broken BBB's LED is not >>>>>> work, the other one's LED is on but does not open. >>>>>> >>>>>> I wonder if is there any mistake(shortage) in my board? >>>>>> >>>>>> There are the board's layout and schematic; >>>>>> https://www.dropbox.com/s/tu3go2uei8ikryp/valf_layout.pdf >>>>>> <https://www.dropbox.com/s/tu3go2uei8ikryp/valf_layout.pdf> >>>>>> https://www.dropbox.com/s/dpziyloas6bttpl/Valf_schematic.PDF >>>>>> <https://www.dropbox.com/s/dpziyloas6bttpl/Valf_schematic.PDF> >>>>>> >>>>>> Thanks for your help in advance. >>>>>> >>>>>> Regards, >>>>>> Ugur >>>>>> -- >>>>>> 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/d/optout >>>>>> <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. >>>> 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/d/optout >>>> <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. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard+unsubscr...@googlegroups.com. >> 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. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > 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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