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  • mini2440移植uboot 2014.04(七)

    上一篇博文:《mini2440移植uboot 2014.04(六)

    代码已经上传到github上: https://github.com/qiaoyuguo/u-boot-2014.04-mini2440

    (十一)将环境变量放入到nand flash并屏蔽DEBUG宏

    虽然nand flash已经基本上可用了,但是现在环境变量仍然是放在Nor flash,需要修改成放入Nand flash内。

    修改include/configs/mini2440.h:

    /* #define DEBUG */
    
    #if 0
     #define CONFIG_ENV_ADDR                        (CONFIG_SYS_FLASH_BASE + 0x070000)
     #define CONFIG_ENV_IS_IN_FLASH
     #define CONFIG_ENV_SIZE                        0x10000
     /* allow to overwrite serial and ethaddr */
     #define CONFIG_ENV_OVERWRITE
    #endif
    
    #define CONFIG_ENV_IS_IN_NAND 1
    #define CONFIG_ENV_OFFSET 0xC0000
    #define CONFIG_ENV_SIZE  0x20000
    #define CONFIG_ENV_OVERWRITE

    重新编译,将生成的u-boot-nand.bin拷贝到nfs文件夹,重启nfs服务:

    cp u-boot-nand.bin /home/host/nfs/mini2440
    sudo /etc/init.d/nfs-kernel-server restart

    进入uboot命令行,执行下面命令:

    nfs 0x33e00000 /home/host/nfs/mini2440/u-boot-nand.bin
    nand erase 0 0x100000
    nand write 0x33e00000 0 0x100000
    reset

    然后在控制台上看到uboot显示信息如下:

    U-Boot 2014.04-g15a1d15-dirty (Jul 03 2014 - 15:13:31)
    
    CPUID: 32440001
    FCLK:      405 MHz
    HCLK:  101.250 MHz
    PCLK:   50.625 MHz
    DRAM:  64 MiB
    WARNING: Caches not enabled
    Flash: ERROR: too many flash sectors
    ERROR: too many flash sectors
    2 MiB
    NAND:  128 MiB
    *** Warning - bad CRC, using default environment
    
    In:    serial
    Out:   serial
    Err:   serial
    Net:   dm9000
    MINI2440 # 
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  • 原文地址:https://www.cnblogs.com/qiaoqiao2003/p/3822502.html
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