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AM437xEVM Uboot 启动时按任意键不能打断uboot?



您好, 

    我在AM437XEVM启动时,Uboot出现了Hit any key to stop autoboot:  2;但是按键停不下来?Uboot 自动倒计时进入了Linux。我希望能进入uboot 命令行

  • 请问是从哪个介质启动的? 检查一下启动方式配置是否正确?
  • 从SD卡启动的
    U-Boot 2014.07-gfb6ab76 (Jul 06 2015 - 16:10:49)

    I2C: ready
    DRAM: 1 GiB
    NAND: 512 MiB
    MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
    reading uboot.env

    ** Unable to read "uboot.env" from mmc0:1 **
    Using default environment

    Net: <ethaddr> not set. Validating first E-fuse MAC
    cpsw, usb_ether
    Hit any key to stop autoboot: 0
    switch to partitions #0, OK
    mmc0 is current device
    SD/MMC found on device 0
    reading uEnv.txt
    717 bytes read in 3 ms (233.4 KiB/s)
    Loaded environment from uEnv.txt
    Importing environment from mmc ...
    4355472 bytes read in 212 ms (19.6 MiB/s)
    48112 bytes read in 25 ms (1.8 MiB/s)
    Booting from mmc0 ...
    Kernel image @ 0x82000000 [ 0x000000 - 0x427590 ]
    ## Flattened Device Tree blob at 88000000
    Booting using the fdt blob at 0x88000000
    Loading Device Tree to 8fff1000, end 8ffffbef ...


    就是 Hit any key to stop autoboot: 在这一步按键UBoot停不下来,按键没有问题的,能进入Linux系统