Use the default environment variables:
=> env default -f -a
-=> save
+=> saveenv
Run the DFU command:
=> dfu 0 mmc 0
$ sudo dfu-util -D u-boot.imx -a boot
-Then on the U-boot prompt the following message should be seen after a succesful
-upgrade:
+Then on the U-boot prompt the following message should be seen after a
+successful upgrade:
#DOWNLOAD ... OK
Ctrl+C to exit ...