We don't have tftp command in u-boot image. See the attached image tftpboot command is available. Please correct the commands in reference tftp 0x21FF0000 u-boot.bin -> tftpboot 0x21FF0000 u-boot.bin U-boot image path. (https://phytecembeddedin-my.sharepoint.com/:f:/g/personal/rbdev_phytecembedded_in/EoI5CKL4f6VIna3Av0PLOWMBP2QwHxjn7Ok0ppFxgwh30w?e=pRTEud)

Hello! Rugged Board A5D2x porting to new AT91Bootstrap4 https://github.com/jagannath-sahoo/at91bootstrap branch: at91bootstrap4-rba5d2x