Re: booting BeagleBoneGreen

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

I managed to scrounge up an 8GB micro-SD card and decompressed
"armv7.img.gz" to it.  The FAT partition on the resulting media looked
reasonable.

Attempting to boot from the micro-SD slot did not work.  I'm quite sure
I managed to hold down the "USER" switch (PCB label, referred to as "BOOT"
in BBG_SRM) while applying power.

The board powers up, but there is no activity on the status LEDs nor on
the debug serial port.  The RESET button does not appear to do anything.
Using the POWER button cycles power and the machine will come up on the
eMMC again.  The micro-SD card is visble in Linux (at least its FAT32
partition is).

Just in case it was relevant, I copied the "MLO" and "u-boot.img" files
from the Linux installation to the micro-SD card's msdos partition.
There was no change in behavior when powering up with the USER switch
held down.

Attempting netboot again, the micro-SD card is seen:

[...]
ld0 at sdmmc0: <0x03:0x5344:SS08G:0x80:0x00561467:0x0f1>
ld0: 7580 MB, 3850 cyl, 64 head, 63 sec, 512 bytes/sect x 15523840 sectors
WARNING: ld0: total sector size in disklabel (2495744) != the size of ld0 (15523840)
ld0: 4-bit width, High-Speed/SDR25, 50.000 MHz
[...]

Specifying "ld0a" as the root device gets as far as "resize_root", but
the watchdog times out and resets the board before it completes.

Perhaps I'll try an update image from the beagleboard site, just to make
sure the micro-SD boot will actually work.

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