[beagleboard]: how to flash only uboot on emmc

Hi,

I am building uboot from source with robert nelson’s instructions here:
https://eewiki.net/display/linuxonarm/BeagleBone+Black

But I do not want to upgrade emmc with rootfs and kernel… only uboot I want to upgrade.

Is it possible to generate flasher image just for uboot on BBB ?

regards
Ritu