/*
* 找到握手包头
*/
private static int FindDownHeaderHandShake(byte[] data, int inlength, out REQTYPE type)
{
byte[] a = new byte[3];
byte[] key = new byte[] { 0x87, 0x7e, 03 };
for (int i = 0; i < inlength - 3; i++)
{
Buffer.BlockCopy(data, i, a, 0, 3);
if (SameArray(a, key))
{
type = REQTYPE.FIND;
return(i + 3);
}
}
byte[] key2 = new byte[] { 0x87, 0x7e, 0x13 };
for (int i = 0; i < inlength - 3; i++)
{
Buffer.BlockCopy(data, i, a, 0, 3);
if (SameArray(a, key2))
{
type = REQTYPE.LOCALUPDATE;
return(i + 3);
}
}
type = REQTYPE.NONE;
return(-1);
}
public int SendRequest(REQTYPE type, byte[] value)
{
byte[] request = Packrequest(type, value);
dumpdata(request, request.Length, "request");
int i = SendData(request);
//sp1.ClosePort();
return(i);
}
/*
* 解压缩握手包
*/
public static byte[] UnpackHandShake(byte[] data, out REQTYPE type)
{
byte[] result = new byte[2];
int loc = FindDownHeaderHandShake(data, data.Length, out type);
if (loc > 0 && type != REQTYPE.NONE)
{
result[0] = data[loc];
result[1] = data[loc + 1];
}
else
{
return(null);
}
return(result);
}
//打包请求数据
public static byte[] Packrequest(REQTYPE type, byte[] value)
{
byte[] returnvalue = new byte[7];
returnvalue[0] = upheader[0];
returnvalue[1] = upheader[1];
returnvalue[2] = upheader[2];
switch (type)
{
case REQTYPE.ERROR:
returnvalue[3] = 0x15;
returnvalue[4] = 0x00;
returnvalue[5] = 0x00;
break;
case REQTYPE.FIND:
returnvalue[3] = 0x25;
returnvalue[4] = value[0];
returnvalue[5] = value[1];
break;
case REQTYPE.DATA:
returnvalue[3] = 0x35;
returnvalue[4] = value[0];
returnvalue[5] = value[1];
break;
case REQTYPE.VERSION:
returnvalue[3] = 0x45;
returnvalue[4] = value[0];
returnvalue[5] = value[1];
break;
}
returnvalue[6] = CRCSUM(returnvalue, 6);
return(returnvalue);
}
