Honored Contributor
Honored Contributorok, I had the same problem on a custom board, I suggest these checks:
1) uart speed (bitrate) compatible with uart in the design 2) uart speed in design equals uart speed in the terminal (kermit? nios2-terminal?) 3) TEXT_BASE in config.mk and the address at which the nios2-download starts processor 4) ./include/configs/yourboard.h contains correct values for uart address (take care of cache bypass), reset vector, exception vector, sys clock frequency. Even in this file there should be some reference (mine has) to the address at which the image is downloaded (TEXT_BASE). These are the checks I made to make my u-boot write something on the serial.
