Communication method based on FPGA, FPGA controller and USB adapter

The invention discloses a communication method based on FPGA, an FPGA controller and a USB adapter. The communication method comprises the steps of acquiring, analyzing, judging and sending the load data and encapsulating and transmitting back the replying data, and can realize the communication process of the driver layer USB separately. The FPGA controller adapted to the communication method includes an FIFO module, a data transceiver module and a state machine module; the FIFO module is adopted to avoid the data backlog phenomenon in the communication process of various data; the data transceiver module strengthens the data transmission ability; and the state machine module is adopted to realize the coordinated data processing between the FIFO module and the data transceiver module. TheUSB adapter comprises a USB controller and an FPGA controller. The USB adapter realizes another communication mode between USB master and slave devices, simplifies the overall circuit structure of the adapter, and reduces th