Dear Ed,
in message GPECLCIGPLHEOMGPMCPAEEIIDOAA.edjubenville@adelphia.net you wrote:
Is it possible to modify environment variables from a standalone application in u-boot?
Yes, of course. You will have to add the getenv / setenv functions to the list of exported interfaces.
I've written a standalone app that reads and prints a 48-bit ethernet MAC address from a Dallas/Maxim DS2502-E48 chip on a custom board. I would like the app to directly modify the "ethaddr" environment variable, rather than relying on the user to retype the printed MAC address into a setenv command.
Note that this may not be possible - in most configurations the "ethaddr" environment variable is read-only, i. e. it cannot be modified or deleted once set.
that does seem to be applicable. Are environment variables somehow accessible through the "global_data" pointer declared in exports.h?
No.
Best regards,
Wolfgang Denk