setenv serverip 192.168.1.6;setenv ipaddr 192.168.1.12;setenv netmask 255.255.0.0;setenv gatewayip 192.168.1.1;sa
    以128M SPI NAND Flash为例。
1, 地址空间说明	set -f ethaddr 00:11:85:18:40:91 128M
    |  2M    |   4M   |  13M    |   90M  |  13M   |  1M   | 1M  |  4M   |
    |--------|--------|---------|--------|--------|-------|-----|-------|
    |  boot  | kernel |  rootfs |   app  |  www   |  para | p2p |  log  |

2,烧写u-boot UB_BOOT_BIT
    mw.b 0x21000000 ff 1e0000;tftp 0x21000000 uboot_V211227;nand erase 0 1e0000;nand write.e 0x21000000 0 160000
3,烧写内核 UB_KERNEL_BIT
    mw.b 0x21000000 ff 400000;tftp 0x21000000 kernel_V211215;nand erase 200000 400000;nand write.e 0x21000000 200000 380000
4,烧写文件系统 UB_ROOTFS_BIT
    mw.b 0x21000000 ff d00000;tftp 0x21000000 rootfs_V211215;nand erase 600000 d00000;nand write.e 0x21000000 600000 c80000
6,烧写app UB_APP_BIT
    mw.b 0x21000000 ff 2a00000;tftp 0x21000000 app_V211202_IPCSC327DE_128M_M;nand erase 1300000 2a00000;nand write.e 0x21000000 1300000 2600000
7,烧写WWW UB_WWW_BIT
    mw.b 0x21000000 ff d00000;tftp 0x21000000 www_V211201;nand erase 6d00000 d00000;nand write.e 0x21000000 6d00000 c80000
8,设置启动参数 UB_ENVAR_BIT
    setenv bootargs 'console=ttyS0,115200 root=/dev/mtdblock2 rootfstype=squashfs ro init=/linuxrc LX_MEM=0x7fc6000 mma_heap=mma_heap_name0,miu=0,sz=0x3400000 mtdparts=nand0:2M(boot),4M(kernel),13M(rootfs),90M(app),13M(www),1M(para),1M(p2p),4M(log)';
    setenv bootcmd 'nand read 0x21000000 200000 380000;bootm 0x21000000';sa;
9,擦参数 UB_PARACLR_BIT
    nand erase 7a00000 80000;
10,擦除备份参数
    nand erase 7a80000 80000;
11,擦除出厂参数区
    nand erase 7b00000 100000;    (注：如果擦除了备份参数区，要重新设置keyid和boardid)