 1
    # ϵu-bootserveriptftpipipaddripethaddrMACַ
    setenv serverip  192.168.1.50
    setenv ipaddr    192.168.1.100
    setenv ethaddr   00:10:85:18:40:91
    setenv netmask   255.255.255.0
    setenv gatewayip 192.168.1.1
    ping serveripȷ糩ͨ
2дӳļSPI Flash
    32M SPI FlashΪ
    1ַռ˵
        |  256K |  64K |     64K     |      64K     |    3M    	   |     3M        |     5248K   |   4M     |   384K   |  64K   |
        |-------|------|-------------|--------------|--------------|---------------|-------------|----------|----------|--------|
        |  boot | para |  start_logo | upgrade_logo |    kernel    |     rootfs    |      app    |   www    |   para   |   P2P  |

        µĲͼʾĵַռ䣬ҲԸʵе
	2дu-bootͿlogologo
      2-1)¼u-boot UB_BOOT_BIT
        sf probe 0; mw.b 82000000 ff 40000;tftp 0x82000000 uboot_V130617;sf probe 0; sf erase 0 40000;sf write 82000000 0 40000
       (/ͼƬȫΪ0xff,ubootͼƬǷ)
        mw.b 82000000 ff 10000;sf probe 0;sf erase 50000 10000;sf write 82000000 50000 10000 
        mw.b 82000000 ff 10000;sf probe 0;sf erase 60000 10000;sf write 82000000 60000 10000 
	 
	  2-2)¼logo UB_LOGO_BIT
		mw.b 82000000 ff 10000;tftp 82000000 start_logo.jpg;sf probe 0;sf erase 50000 10000;sf write 82000000 50000 10000
	  2-3)¼logo
		mw.b 82000000 ff 10000;tftp 82000000 upgrade_logo.jpg;sf probe 0;sf erase 60000 10000;sf write 82000000 60000 10000
    3дں UB_KERNEL_BIT
        mw.b 82000000 ff 300000;tftp 82000000 uImage_hi3521a;sf probe 0;sf erase 70000 300000;sf write 82000000 70000 300000
    4)дļϵͳ UB_ROOTFS_BIT
        mw.b 82000000 ff 300000;tftp 0x82000000 rootfs_hi3521a_64k.jffs2;sf probe 0;sf erase 370000 300000;sf write 82000000 370000 300000
	5)дapp UB_APP_BIT
		mw.b 82000000 ff 520000;tftp 0x82000000 app_V141112_DVR04_M;sf probe 0;sf erase 670000 520000;sf write 82000000 670000 520000
	6)дWWW UB_WWW_BIT
		mw.b 82000000 ff 400000;tftp 0x82000000 www_V131106;sf probe 0;sf erase b90000 400000;sf write 82000000 b90000 400000	
    7 UB_ENVAR_BIT
        setenv bootargs 'mem=175M console=ttyAMA0,115200 root=/dev/mtdblock2 rootfstype=squashfs mtdparts=hi_sfc:448K(boot),3M(kernel),3M(rootfs),5248K(app),4M(www),384K(para),64K(p2p)';
        setenv bootcmd 'sf probe 0;sf read 0x82000000 0x70000 0x300000;bootm 0x82000000';sa;
    8) UB_PARACLR_BIT
		sf probe 0;sf erase f90000 60000	
	9)ݲ
		sf probe 0;sf erase ff0000 10000(ע˱ݲҪkeyidboardid)	
