面向USB应用的CRC编解码电路的设计与实现

文章在介绍CRC算法原理的基础上,根据除法原理的模2法则构造出通用的CRC编码电路。然后在USB环境应用特点的基础上给出了适用于USB应用的CRC电路结构,以及相应的Verilog-HDL描述。该设计可以用具体电路实现,也可以以IP软核的形式嵌入到其它USB设计中。讨论分析的思路和实现方法不仅对USB应用有意义,而且对其它数据传输电路结构(如CAN总线)也有一定的参考价值。

CRC algorithm and its application in USB

Based on the principle and algorithm of cyclic redundancy code(CRC) check and the principle of division that follows the rules of module2, the general coding circuit of the CRC is generated. Then the use of the CRC in the environment of the universal serial bus(USB) is discussed. Some characters in the use of the CRC applied in the USB are presented. The hardware circuit of the CRC described in the Verilog-HDL language is provided. This design is implemented by a specific circuit,and it can also be embedded in other design about the USB as a soft core. The analysis and implementation methods in the paper are useful to both the USB and other circuits such as the CAN bus.