我具体的步骤是:210USB启动(选择天嵌提供的Uboot镜像文件)-->同时按住空格键-->进入选择菜单-->选择7([7] Download Program to SDRAM and Run it)-->输入内存地址0x2000 0000-->usb下载--->uboot--->选择镜像(自己写的程序(通过arm gcc生成的文件))
##### Boot for TQ210 Main Menu#####
##### EmbedSky USB download mode #####
[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash
[2] Download Eboot (eboot.nb0) to Nand Flash
[3] Download Linux Kernel (zImage.bin) to Nand Flash
[4] Download LOGO Picture (logo.bin) to Nand Flash
[5] Download UBIFS image (root.ubi) to Nand Flash
[6] Download YAFFS image (root.bin) to Nand Flash
[7] Download Program to SDRAM and Run it
[8] Boot the system
[9] Format the Nand Flash
[0] Set the boot parameters
[a] Download User Program
[n] Enter TFTP download mode menu
[r] Reboot u-boot
[t] Test Linux Image (zImage)
Enter your selection: 7
Enter download address:(eg: 0xc0008000)
*0x20000000
OTG cable Connected!
Now, Waiting for DNW to transmit data