uboot emmc版本 ip地址 1setenv ipaddr '192.168.8.210';setenv serverip '192.168.8.217'; 下载烧写uboot 1mmc dev 0 1;tftp a1000000 Flash.img;mmc erase 0 2000; mmc write a1000000 0 2000 下载烧写内核 1mmc dev 0 ; tftp a1000000 uImage_FH8856V500; mmc write a1000000 0 5500;reset 启动内核 1mmc dev 0; mmc read 0xA1000000 0 5500; bootm 0xA1000000 分区 1 2 30-2M bootloader 2M-26M kernel 6001-M rootfs