/// <summary>
/// 校验数据是否合法
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
public static bool CheckData(byte[] buffer)
{
Console.WriteLine();
StringBuilder sb = new StringBuilder();
byte SOF = buffer[0];
//length 是出去SOF 和EOF 的总长度
int length = Convert.ToInt32(buffer[1]);
byte EOF = buffer[length + 1];
//判断结束位
if (EOF != 0x3F)
{
return(false);
}
byte[] sourceCRC = new byte[2];
//获取CRC 字节
Buffer.BlockCopy(buffer, length - 1, sourceCRC, 0, 2);
//判断CRC ,长度为出去 BOF 和 EOF ，CRC
byte[] CRCbyte = new byte[length - 2];
Buffer.BlockCopy(buffer, 1, CRCbyte, 0, length - 2);
//转出的CRC 始终是低位到高位，于C代码中高位到低位相反
var convertCRC = BitConverter.GetBytes(CRC.CCITT_CRC16(CRCbyte));
if (convertCRC[1] == sourceCRC[0] && convertCRC[0] == sourceCRC[1])
{
return(true);
}
return(false);
}
/// <summary>
/// 发送事件片数据
/// </summary>
/// <param name="buffer"></param>
/// <param name="callNumber"></param>
/// <returns></returns>
public static byte[] GetTagID(byte[] buffer, int callNumber)
{
byte[] command = new byte[16];
command[0] = 0x3E;
command[1] = 0x0c + 1;
command[2] = 0xA9;
//复制基站ID 和 标签ID
for (int i = 3; i <= 10; i++)
{
command[i] = buffer[i];
}
command[11] = 0x30;
command[12] = (byte)callNumber;
byte[] crc = new byte[command.Length - 4];
Buffer.BlockCopy(command, 1, crc, 0, command.Length - 4);
byte[] convertCrc = BitConverter.GetBytes(CRC.CCITT_CRC16(crc));
//颠倒高低位
command[13] = convertCrc[1];
command[14] = convertCrc[0];
command[15] = 0x3F;
return(command);
}
