[0] Set the boot parameters
[a] Download User Program (eg: uCOS-II or TQ2440_Test)
[b] Download LOGO Picture (.bin) to Nand Flash
[l] Set LCD Parameters
[r] Reboot u-boot
[q] quit from menu
Enter your selection: 6
USB host is connected. Waiting a download.
Length of file is too big : 73683456 > 64085884//文件太大