[beagleboard] Re: Image 2015-07-19
On Monday, July 27, 2015 at 10:27:52 AM UTC-6, dl4mea wrote: I meanwhile tried if a 1k resistor from Vbat-Sense to ground helps: No, does not. Summarizing my feeling: Feeding +5V to the back side USB helps a little, 1k resistor over Vbat-Sense does not help. You might want to try connecting TP5 (BAT) to TP6 (BAT_SENSE). You can use a resistor if you want, but BAT_SENSE is a high impedance input. These terminals would normally be connected to each other at the battery. On the BBB they are not connected to anything. The PMIC sends test currents out the BAT pin and measures the resulting voltages on the BAT_SENSE pin. These functions can't work if they are not connected. The measured voltage on BAT_SENSE may drift depending upon the leakage currents at the floating input. Dennis Cote -- 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.
[beagleboard] Re: Image 2015-07-19
Agreed. But at the same time, the same hardware, right or wrong, works fine under 3.14 and prior. So there has been some software change since 3.14 in the way that the hardware is managed. --- Graham == On Tue, Jul 28, 2015 at 5:47 PM, Dennis Cote denn...@harding.ca wrote: On Monday, July 27, 2015 at 10:27:52 AM UTC-6, dl4mea wrote: I meanwhile tried if a 1k resistor from Vbat-Sense to ground helps: No, does not. Summarizing my feeling: Feeding +5V to the back side USB helps a little, 1k resistor over Vbat-Sense does not help. You might want to try connecting TP5 (BAT) to TP6 (BAT_SENSE). You can use a resistor if you want, but BAT_SENSE is a high impedance input. These terminals would normally be connected to each other at the battery. On the BBB they are not connected to anything. The PMIC sends test currents out the BAT pin and measures the resulting voltages on the BAT_SENSE pin. These functions can't work if they are not connected. The measured voltage on BAT_SENSE may drift depending upon the leakage currents at the floating input. Dennis Cote -- 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.
[beagleboard] Re: Image 2015-07-19
I meanwhile tried if a 1k resistor from Vbat-Sense to ground helps: No, does not. Summarizing my feeling: Feeding +5V to the back side USB helps a little, 1k resistor over Vbat-Sense does not help. Günter (dl4mea) -- 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.
[beagleboard] Re: Image 2015-07-19
BBB1: HWaddr 1C:BA:8C:D9:5E:DD Power: Adafruit 2A supply on Barrel +5V Port. loaded bone-debian-8.1-console-armhf-2015-07-19-2gb.img BeagleBoard.org Debian Image 2015-07-19 Linux beaglebone 4.1.2-ti-r4 #1 SMP PREEMPT Thu Jul 16 20:48:37 UTC 2015 armv7l GNU/Linux Jul 22 00:43:54 Initial Boot (Unmodified/not updated) Jul 23 07:06:14 Autonomous Reboot Jul 24 13:23:02 Autonomous Reboot Jul 24 19:56:24 Autonomous Reboot Jul 24 21:34:38 Autonomous Reboot Jul 25 19:39:58 Autonomous Reboot Jul 26 15:09:57 Autonomous Reboot Jul 26 17:12:13 Test Terminated Meanwhile BBB2: HWaddr D0:39:72:19:72:3F Power: Bench Supply on Barrel +5V Port. Running: bone-debian-8.1-console-armhf-2015-06-15-2gb.img BeagleBoard.org Debian Image 2015-06-15 Linux BBB2 3.14.43-ti-r67 #1 SMP PREEMPT Thu Jun 4 20:37:18 UTC 2015 armv7l GNU/Linux which also reports to have usb-otg enabled, did not misbehave once in the same period. == Is there some newer kernel version that you would like me to test, or some other test you would like to see me run? --- Graham == -- 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.
