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DM8148做的板子,想从SD卡启动,现在还不知道SD卡模块是不是好的,怎么调试SD卡模块?

Other Parts Discussed in Thread: TXS0108E

DM8148做的板子,现在上的以后可以从串口模块输出cccccc了。想从SD卡启动,但是现在还不知道SD卡模块是不是好的,要怎么调试SD卡模块呢?