I use the FX3 contact to a spi chip,i use the spi with the DMA mode,the external chip need that the MOSI PIN of FX3 must be high level,but when i init the spi interface of the FX3,this pin is low level in the idel state.then i use the spi with the DMA mode to transfer and receive at the same time ,and when read data from the external chip ,i transfer oxff.but when i set to transfer and receive only one word,the CyU3PDmaChannelWaitForCompletion return is eeror(CY_U3P_ERROR_NOT_STARTED) ,
status = CyU3PDmaChannelSetupRecvBuffer (&glSpiRxHandle, &buf_p);
You can refer to UsbSpiDmaMode example given in the FX3 SDK. Can you tell me what is the size of word? 16 or 32? CyU3PDmaChannelSetupRecvBuffer has a restriction of 32bytes multiple when the DCache is enabled.