Step through the following procedure in order to install the <project>.uImage bootable Linux image to your board:

1. Download the bootable Linux image (<project>.uImage) and copy it to the TFTP boot directory on your development host (C:\Program Files\Tftpd32 if you installed Tftpd32 on the Windows host).
2. Connect to the serial console, reset the board and stop auto-boot by hitting any key. Being at the U-Boot prompt, run the following U-Boot commands to load the image over TFTP and install it to the Flash:

BOARD> setenv image <project>.uImage
BOARD> run update

3. Next reset will load the newly installed image from the Flash:

BOARD> reset
resetting ...