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AM437X从sd卡启动



我的步骤是这样的:

1.将ccs生成的app.out文件,经过下面命令
arm-none-eabi-objcopy -O binary app.out app.bin
已经得到app.bin文件
再经过:
tiimage.exe 0x80000000 NONE app.bin app_ti.bin
得到app_ti.bin文件
2.MLO文件在pdk_am437x_1_0_14\packages\ti\starterware\binary\bootloader\bin\am43xx-evm\gcc\bootloader_boot_mmcsd_a9host_debug_ti.bin
3.将第1步和第2步的app_ti.bin文件和bootloader_boot_mmcsd_a9host_debug_ti.bin文件重命名为app和MLO,拷贝到SD卡后,启动
一直显示

Copying application image from MMC/SD card to RAM
Jumping to StarterWare Application...

请问是第一步的第二个命令tiimage.exe 0x80000000 NONE app.bin app_ti.bin有问题吗还是?

是什么问题呢?