On Mon, Jan 8, 2018 at 12:54 PM, Sergey Manucharian <[email protected]> wrote: > It's not clear to me: why when both eMMC and SD present and contains u-boot > (both in raw mode), the CPU decides to boot from eMMC. > Is there a way to default to SD? The Technical Reference mentions a timeout, > or am I missing anything? > Of course, the latest u-boot (in eMMC) does check for SD presence and > switches to it, but if I have many BBBs with preinstalled old stuff, I have > to press S2 to force booting from SD every time.
Open up the schematic, this "hardware" configuration is documented on page 6 https://github.com/beagleboard/beaglebone-black/blob/master/BBB_SCH.pdf >From that schematic, you'll notice the first row: "MMC1 (eMMC)" is listed "before" "MMC0 (microSD)".. By pressing the S2 button, the cpu is booting via the second row: 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYiwkoY0Nr%2Ba7SL9kjK%3DygbESXqhEVVP0ifmzi%3DuUgvkkg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
