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最近在调28388D通过SPI控制SD卡的读写操作。
涉及到必须有发送74个以上的时钟周期。
请教一下,28388D的一个时钟周期,大概多少us。
发送74个以上时钟周期,我想通过DEVICE_DELAY_US();来实现。
特来请教
期待您的回复!
谢谢