On Thu, Jan 14, 2016 at 11:51 AM, Tom Rini <tr...@konsulko.com> wrote:
> On Thu, Jan 14, 2016 at 11:48:07AM -0600, Robert Nelson wrote: > > On Thu, Jan 14, 2016 at 11:31 AM, Tom Rini <tr...@konsulko.com> wrote: > > > > > On Mon, Jan 11, 2016 at 09:59:18AM -0700, Simon Glass wrote: > > > > Hi Craig, > > > > > > > > On 20 December 2015 at 19:07, Craig McQueen > > > > <craig.mcqu...@innerrange.com> wrote: > > > > > This is to avoid the boot sequence halting due to initial "junk" > > > > > received on serial input. > > > > > > > > > > Signed-off-by: Craig McQueen <craig.mcqu...@innerrange.com> > > > > > --- > > > > > I have found that on the BeagleBone Black, U-Boot occasionally > halts at > > > > > the U-Boot prompt at boot-up, whether power-up, warm external > > > > > reset or software reset. I have seen other people report the same > > > issue. > > > > > > > > > > This seems to be due to U-Boot receiving "junk" data on the serial > > > > > console. The BeagleBone Black has a pull-down resistor which was > > > > > apparently added to try to mitigate this issue, but it doesn't > entirely > > > > > fix it. > > > > > > > > I wonder if this can be fixed for that board only? > > > > > > No, and it's not -exactly- a that board only problem. It's a HW design > > > issue that can show up elsewhere too. I _think_ however in this case > > > the answer would be to migrate to perhaps CONFIG_AUTOBOOT_KEYED_CTRLC > as > > > that's one of the reason various other boards use that set of options. > > > > > > I would suggest bringing this up on the beaglebone list to see what the > > > various people that ship and support these boards think, thanks! > > > > > > > I actually enabled this feature this week by default for beagleboard.org > : > > > > diff --git a/configs/am335x_evm_defconfig b/configs/am335x_evm_defconfig > > index 27cb881..8699953 100644 > > --- a/configs/am335x_evm_defconfig > > +++ b/configs/am335x_evm_defconfig > > @@ -3,7 +3,10 @@ CONFIG_TARGET_AM335X_EVM=y > > CONFIG_SPL_STACK_R_ADDR=0x82000000 > > CONFIG_SPL=y > > CONFIG_SPL_STACK_R=y > > -CONFIG_SYS_EXTRA_OPTIONS="NAND" > > +CONFIG_AUTOBOOT_KEYED=y > > +CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n" > > +CONFIG_AUTOBOOT_DELAY_STR="d" > > +CONFIG_AUTOBOOT_STOP_STR=" " > > # CONFIG_CMD_IMLS is not set > > # CONFIG_CMD_FLASH is not set > > CONFIG_CMD_GPIO=y > > > > It'll take time to replace older images but on target users can just: > > > > cd /opt/scripts/tools/developers/ > > git pull > > sudo ./update_bootloader.sh > > > > U-Boot SPL 2016.01-00001-g4eb802e (Jan 13 2016 - 11:14:31) > > Trying to boot from MMC > > bad magic > > > > > > U-Boot 2016.01-00001-g4eb802e (Jan 13 2016 - 11:14:31 -0600), Build: > > jenkins-github_Bootloader-Builder-313 > > > > Watchdog enabled > > I2C: ready > > DRAM: 512 MiB > > Reset Source: Global external warm reset has occurred. > > Reset Source: Power-on reset has occurred. > > MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 > > Using default environment > > > > Net: <ethaddr> not set. Validating first E-fuse MAC > > cpsw, usb_ether > > Press SPACE to abort autoboot in 2 seconds > > => > > Space eh? OK. Now would be the time to push this upstream as the merge > window just opened :) > That seemed like the most common when i looked at it.. grep -R "AUTOBOOT_PROMPT" configs/*defconfig Do you want me to hit all 3 bbb related configs? beagleboard.org uses: am335x_evm_defconfig I know some users use: am335x_boneblack_defconfig am335x_boneblack_vboot_defconfig Regards, -- Robert Nelson https://rcn-ee.com/ -- 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.