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TMS320F28335: 8路DAC输出问题

Part Number: TMS320F28335
Other Parts Discussed in Thread: TLV5620, C2000WARE

我现在想实现28335的8路DAC输出,用的是外设的TLV5620 DAC芯片,通信协议是SPI。但是TLV5620是4通道输出芯片,同时F28335只有一路SPI-A,只能控制一片TLV5620,无法实现8路输出。请问该怎么解决?