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我的目的是使用CC3235SF作为SPI的从机，接收数据，在测试过程中，发现SPI接收不了数据，于是将SPI作为主机，将例程做如下修改，发现，SPI发送时，无时钟信号，无数据信号，想确认一下，是怎么回事呢？
示波器图测试图如下：
没有具体要求，关于SPI信号可以看手册第8章https://www.ti.com.cn/cn/lit/ug/swru543a/swru543a.pdf?ts=1615970764566&ref_url=https%253A%252F%252Fwww.ti.com.cn%252Fproduct%252Fcn%252FCC3235SF%253FkeyMatch%253DCC3235SF%2526tisearch%253DSearch-CN-everything%2526usecase%253DGPN
