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The straight forward way to invoke the golden partition

is to erase both the primary and secondary partitions.

the inability to boot from either partitions will force uboot

to copy the golden partition to the primary partition and reboots the terminal.

The following commands to erase flash are documented in the L4 SDK user guide:

[type the following in uboot after getting into uboot, ie hit any key]

nand erase clean f30000 868000  <-- this erases primary

nand erase clean 1798000 868000  <-- this erases secondary

reset   <-- reboot the terminal