1、进入uboot修改源码
vim include/configs/lx2160a_common.h最后增加
/*Begin:add by zhaobaoxing for env*/
#define CONFIG_SYS_MMC_ENV_DEV 0
#define CONFIG_ENV_SIZE 0x2000 /* 8KB */
#define CONFIG_ENV_SECT_SIZE 0x20000
#define CONFIG_ENV_OFFSET 0x500000
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
/*End:add by zhaobaoxing for env*/
2、修改fw_env.config文件
# Configuration file for fw_(printenv/setenv) utility.
# Up to two entries are valid, in this case the redundant
# environment sector is assumed present.
# Notice, that the "Number of sectors" is not required on NOR and SPI-dataflash.
# Futhermore, if the Flash sector size is omitted, this value is assumed to
# be the same as the Environment size, which is valid for NOR and SPI-dataflash
# Device offset must be prefixed with 0x to be parsed as a hexadecimal value.
# NOR example
# MTD device name Device offset Env. size Flash sector size Number of sectors
#/dev/mtd1 0x0000 0x4000 0x4000
#/dev/mtd2 0x0000 0x4000 0x4000
# MTD SPI-dataflash example
# MTD device name Device offset Env. size Flash sector size Number of sectors
#/dev/mtd5 0x4200 0x4200
#/dev/mtd6 0x4200 0x4200
# NAND example
#/dev/mtd0 0x4000 0x4000 0x20000 2
# On a block device a negative offset is treated as a backwards offset from the
# end of the device/partition, rather than a forwards offset from the start.
# Block device example
/dev/mmcblk0 0x500000 0x2000
#/dev/mmcblk0 -0x20000 0x20000
# VFAT example
#/boot/uboot.env 0x0000 0x4000
# UBI volume
#/dev/ubi0_0 0x0 0x1f000 0x1f000
#/dev/ubi0_1 0x0 0x1f000 0x1f000
# UBI volume by name
#/dev/ubi0:env 0x0 0x1f000 0x1f000
#/dev/ubi0:env-redund 0x0 0x1f000 0x1f000
~
