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TDA4VM: mcu1_0上使用mcu_mcspi1 Slave

Part Number: TDA4VM

你好,我在mcu1_0上使用mcu_mcspi1作为Slave,通过示波器测量点CS、CLK、DI波形正常,但是Receive函数无法收到数据,我想知道有没有寄存器标识或者有什么方法可以确认SPI是否连通?

除此之外,我想请教一下mcu_mcspi1 作为Slave 是通过什么判断Master正在传输数据?