以SD卡升级spi nand为例: 1、修改uboot-env.txt文件 board/nuvoton/ma35d1/uboot-env.txt 在spinandboot命令下添加 if fatload mmc 0:1 0x90000000 uboot-update-cmd.img;then source 0x90000000;fi; spinandboot=if test ${mtdids} = 'spi-nand0=spi-nand0' ;then echo "Booting from spinand ... ...";if fatload mmc 0:1 0x90000000 uboot-update-cmd.img;then source 0x90000000;fi; mtd list; setenv bootargs noinitrd ubi.mtd=${spinand_ubiblock} root=ubi0:rootfs rootfstype=ubifs rw rootwait=1 console=ttyS0,115200n8 rdinit=/sbin/init mem=${kernelmem}; mtd read kernel ${kernel_addr_r}; mtd read device-tree ${fdt_addr_r}; booti ${kernel_addr_r} - ${fdt_addr_r}; fi 2、新建一个文件uboot-update.script,里面是下面的命令: fatls mmc 0:1 mtd erase device-tree mtd erase kernel mtd erase rootfs fatload mmc 0:1 0x90000000 img5.bin mtd write device-tree 0x90000000 fatload mmc 0:1 0x90000000 img6.bin mtd write kernel 0x90000000 fatload mmc 0:1 0x90000000 img7.bin mtd write rootfs 0x90000000 3、用output/host/bin目录下的mkimage工具将文件uboot-update.script转换成image(uboot-update-cmd.img) ./mkimage -A arm -O linux -T script -C none -n "uboot-nor script" -d ~/workspace/uboot-update.script ~/workspace/uboot-update-cmd.img 4、把需要更新的image 和uboot-update-cmd.img拷贝到SD卡,SD卡插入到开发板
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