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在ti的MQTT范例基础上添加SPI设备,发现SPI接口已经被NWS占用了,我该如何实现SPI的一主多从?

在ti的MQTT_Client_severs范例基础上添加SPI设备,发现SPI接口已经被NWS占用了,我该如何实现SPI的一主多从?