Transfering file to U-Boot over serial

If you are using “minicom” to communicate with U-Boot and want to transfer Linux kernel image over serial you should first install lrzsz package:

$ sudo apt-get install lrzsz

Then on minicom issue this command on U-Boot prompt:

=> loady                                                                        
## Ready for binary (ymodem) download to 0xA0800000 at 115200 bps...            
C

Now press Ctrl + A, then release keyboard and press S. It will show a text window to select what protocol to use, then select ymodem. Now select a file to upload (press Space) and press Enter to confirm.

U-Boot Error: undefined reference to `eth_send’

To solve that error just define:

#define CONFIG_MII
#define CONFIG_NET_MULTI

Obviously you need also to select Ethernet chip used on your board.