CRC principle in USB and implementing with Verilog HDL

As an important error detection measure,CRC protects over control and data fields in USB Specification.By the CRC Com-putation,receiver can detect whether packet has been corrupted during transport.The Verilog Hardware Description Language is often used to design digital electronic systems,anddesigner can use it to describe the logic ofelectronic systems at different levels of abstraction.The basal principle of cyclic redundancy code and cyclicredundancy check in USB specification were introduced.Thecircuits and Verilog HDL programs which design for serial or parallel CRC computation were also introduced.