请教下TI 工程师,cc3200 GSPI从模式配置DMA传输时,SPI_3PIN_MODE是什么意思?是只有CLK和两个数据线,没有片选信号线吗?另外SPI_TURBO_OFF和SPI_TURBO_ON是代表什么意义?作为从模式时要怎么配?另外GSPI 从模式下,半双工模式(某时刻只接收或只发送,而不是接收和发送同时进行)要怎么实现?
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