In order to solve the problem of parallel high-speed data acquisition of multi-channel USB3.0 devices in embedded systems,an xHCI protocol soft core is designed based on the PCI Express bus of FPGA.The main package of the designed soft core includes the xHCI protocol command ring,isochronous transfer ring,control transfer ring and other functional parts,and so on,the control and data acquisition of USB3.0 video cameras are implemented by applying the designed soft core.The experiment results show that the designed xHCI protocol soft core can effectively and accurately complete the control and data acquisition of USB high-resolution cameras.The method effectively solves the difficulties of computer implementation of multi-channel USB3.0 devices for parallel synchronous data transfer,and has stronger universality and flexibility in future applications.
Key words
xHCI /
FPGA /
soft core /
USB3.0 camera /
PCI Express /
uPD720202
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