206 /×××××××××××××××××××××××××××××××××××××××××× ×××××××××××××××××××××××××××××××××××××××××××/ 207 Brush your own system to the development board: 208 uboot ----- superboot.bin 209 zimage ------- Kernel in FriendlyARM 210 ramdisk-u.img---------- development The virtual file system that comes with the board 211 root.img-------------- The image file generated by the root file system made by yourself 212 Generate the image of the root file system: 213 214 make_ext4fs -s -l 512M -L linux root.img myroot/ 215 rm myroot/dev /* -rf 216 du -sh root.img image size should be about 30M 217 Flashing steps: make SD card partition---burn superboot to SD card---copy the above files to sd card--insert SD--switch to SD card to start--after successful flashing--- Switch to emmc start--reset--success 218 219 /××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××/