您好,我想将MMWAVE SDK 3.5版本中的IWR1843的Demo改成SPI串口输出点云,但是修改完程序后 CCS 8.3.1 编译不通过,原因是SPI串口的所有函数未被定义。但是我已经包含SPI的头文件了,而且SPI相关的结构体定义都未报错,请问这是由于什么原因导致的?
在mss_main.c中包含SPI串口的头文件:

CCS报错:

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