[U-Boot] help: how get last command result using scripting

[Michael Nazzareno Trimarchi]

Hi all

Trying to understand how to get the last result. For example:
sspi 1:0.3 24 700002; sspi 1:1.3 24 730000

Now I need to have the last output of the last command to compare in
one script. Any idea?

Michael