The customized u-boot-spl image is copied to non-removable EMMC flash. After programming the u-boot, my board is not giving any debug information through a serial console. Currently, all the peripherals and boot modes (USB and NFS boot) are not working as it was unable to come atleast u-boot prompt. I'm sure, the u-boot is incompatible with the board. Is there any, that I can write the inital u-boot image to EMMC like hardware level debuggers?