crc5 bolck in usb contreoller

在C8051F120单片机上使用的EPC协议中的CRC5和CRC16的校验函数，和一般的校验不太一样，提供了源码，可以直接使用。-C8051F120 MCU used in the EPC Agreement CRC5 and CRC16 checksum function, and general validation are not the same, providing a source, can be used directly.

用VerilogHDL编写的CRC5校验，可以综合。-Check with VerilogHDL CRC5 prepared, can be summarized.

CRC 5 encription and decription module. Operates with serial input data, CRC output is 5bits register. If you decoding CRC the input is valid when output is set to 00000 .-CRC 5 encription and decription module. Operates with serial input data, CRC o