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SPI 时钟问题

Other Parts Discussed in Thread: DM3730

请问:

     DM3730的SPI模块我已经实现了自发自收,问题是在自发自收过程中示波器看不到CLK引脚的波形,进行参数数据时,也看不到波形,这个是哪里的问题,是SPI的寄存器配置有问题吗