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AM3359 Bootloader UART 不能输出message

Other Parts Discussed in Thread: AM3359

①我有两个AM3359的ICE,其中一个Bootloader启动时会输出以下信息


*** StarterWare AM335x Boot Loader. Build - 1.0.0 ***
Copying application image from MMCSD to RAM
Unable to open   application file from MMCSD
Copying application image from SPI to RAM  Image Copy
Successful, Executing Application..

这个Bootloader的源代码是一致的(bl_main.c文件的88行起,请参考附件)。

另外一个AM3359 ICE 和上一个的设置一样,但却不能输出任何信息,这是为什么呢?

bootloader.zip