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MCBSP做SPI模式时，假如我想用一个MCBSP接口控制两个SPI从设备。两个从设备的CLK，MOSI，MISO接在一起，只不过其中一个从设备的片选接MCBSP的FSX引脚，另一个从设备的片选接一个DSP的GPIO，这样节约以下引脚资源可不可以？
