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.
Attach you firmware for reference.
thanks for you answer,the word is 8bit,is there some ways to transfer and receive one byte?