$GPGGA 数据包的ASCII异或校验和计算方法（C# and Vb.net)
C#代码
/// <summary>
/// 获得字节数组的异或校验和;全字符串
/// char a[]="$GPGGA,085014.955,2839.2050,N,11549.5721,E,1,04,03.6,76.6,M,-6.2,M,,*4C";
/// </summary>
/// <param name="Bytes"></param>
/// <returns></returns>
public int XoryanzhenQstring(byte[] Bytes)
{
int i, result;
for (result = Bytes[1], i =2; Bytes[i] != Convert.ToByte( '*'); i++)
{
result ^= Bytes[i];
}
return result;
}
/// <summary>
/// 取$和*之间的所有ACSII码值得异或校验和;不包含$和*
/// </summary>
/// <param name="Bytes"></param>
/// <returns></returns>
public int XoryanzhenBTstring(byte[] Bytes)
{
int i, result;
for (result = Bytes[0], i = 1; i < Bytes.Length ; i++)
{
result ^= Bytes[i];
}
return result;
}
///* ----------------
/// <summary>
/// 获得字节数组的异或校验和;全字符串
/// char a[]="$GPGGA,085014.955,2839.2050,N,11549.5721,E,1,04,03.6,76.6,M,-6.2,M,,*4C";
/// </summary>
/// <param name="Bytes"></param>
/// <returns></returns>
public int XoryanzhenQstring(byte[] Bytes)
{
int i, result;
for (result = Bytes[1], i =2; Bytes[i] != Convert.ToByte( '*'); i++)
{
result ^= Bytes[i];
}
return result;
}
/// <summary>
/// 取$和*之间的所有ACSII码值得异或校验和;不包含$和*
/// </summary>
/// <param name="Bytes"></param>
/// <returns></returns>
public int XoryanzhenBTstring(byte[] Bytes)
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