CRC校验，输入为十六进制，每字节程序自动加空格分开，计算结果为2字节十六进制。对输入框的输入和删除都是针对之后一个字符。输入的字母自动转换为大写。-CRC, the input to hex, each byte of the program automatically add a space to separate the results for the 2-byte hexadecimal. The input of the input box and delete a character after all for. Enter the letters are automatically converted to uppercase.