[beagleboard] BBB eMMC failure
Hi, We have a BBB returned from the field after just 3 months of operation. It runs kernel 3.8.13, and console shows the "C" letter when booting from eMMC, indicating that there is no valid boot. Booting from an external SD Card with the latest debian image available works, but it shows this message: *mmc1: error -110 whilst initialising MMC card* Obviously, mmc1 does not appear on the /dev list, so we cannot use the mmc-utils tool to read the eMMC We have measured the supply voltages: - VDD_3V3A - 3.3V - VDD_3V3B - 3.4V We are pretty confident about the surrounding hardware and software, as there are around 2k devices on the field, summing more than 12 millions hours of operations with no failure. Any idea on how to proceed to find out the failure root cause? Thanks! -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/f2c9420d-a8c9-43a5-84f4-d14723ae25a8n%40googlegroups.com.
[beagleboard] BBB eMMC setup failure
I'm investigating a BBB unit that got stuck during power-up. Only power led, and no data through console. Rebooting or powering from USB or plug didn't help. It was recovered after re-flashing the eMMC fdisk and write-tests on the MMC shown no failures. After thousand of powr cycle tests, I managed to repeat a "weird" situation once again. Booting from SD, the MMC appears not properly configured. I can mount the MMC, but it is empty. I don't know what caused that issue. I've been re-flashing the unit many times, and suddenly, it noticed the issue. I only managed to recover the unit after re-flashing again. Rebboting/cycling the power didn't worked. The environment is noise free, and power supply is stable I got the MMC registers (/sys/kernel/debug/mmc1) during the fail scenario: *Working scenario:* clock: 5200 Hz *vdd:7 (1.65 - 1.95 V)* bus mode: 2 (push-pull) chip select:0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec:1 (mmc high-speed) signal voltage: 0 (3.30 V) regs: CON:0x0620 HCTL: 0x0b04 *Failing scenario:* clock: 5200 Hz *vdd:21 (3.3 ~ 3.4 V*) bus mode: 2 (push-pull) chip select:0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec:1 (mmc high-speed) signal voltage: 0 (3.30 V) regs: CON:0x8620 HCTL: 0x0d00 It is suposed that u-boot/kernel setup the MMC host based on MMC data durind start-up. So I guess this kind of failure is hardware related. Any ideas? Thanks! -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/3cd37627-68af-49f3-b962-13e599367cba%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Purchase original Beaglebone (white)
Thanks! -- 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: Purchase original Beaglebone (white)
Just to not open a new post. Is the Beaglebone White discontinued? It is really hard to find any unit in stock. Thanks! -- 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] Position of LCD in LCD3 cape
Hi, We are developing a product using the LCD3 cape display, and we are trying to find out the drawing of the position of the display in the board. We have checked some units, and it seems to have high tolerances on its positioning. Can anybody help us on this topic? Thanks! -- 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: BeagleBone Black RTC?
William, don't know yet :). Information about this topic was confusing, so first step was to prove that the BBB and a Li-Po battery can keep the RTC alive. -- 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.
