/// <summary>
/// Xmode数据包初始化
/// </summary>
/// <param name="startHeader">起始字符,决定Xmode类型</param>
/// <param name="packetNum">包序号</param>
/// <param name="validData">有效数据，不足长度将自动填充,超过部分丢弃</param>
/// <param name="len">有效数据数据长度</param>
public XmodePacket(XmodeStartHeader startHeader, byte packetNum, byte[] validData, int len)
{
try
{
if (validData.Length < len)
{
throw new Exception("XmodePacket：有效数据实际长度小于所定义长度");
}
if (XmodeStartHeader.SOH == startHeader)
{
validDataLen = 128;
}
else
{
validDataLen = 1024;
}
packetData = new byte[PacketLen];
packetData[0] = (byte)startHeader;
packetData[1] = packetNum;
packetData[2] = (byte)(packetNum ^ 0xFF); //取反
if (len >= validDataLen) //大于等于则直接填充有效长度
{
Array.Copy(validData, 0, packetData, 3, validDataLen);
}
else
{
//小于部分填充数据包
if (len == 0)
{
throw new Exception("XmodePacket：有效数据长度不能为0");
}
Array.Copy(validData, 0, packetData, 3, len);
for (int i = len; i < validDataLen; i++)
{
packetData[3 + i] = (byte)XmodeDefine.EOF;
}
}
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 数据包管理器初始化
/// </summary>
/// <param name="data">需要打包的数据</param>
/// <param name="len">数据长度</param>
/// <param name="startHeader">开始字符</param>
public XmodePacketManager(byte[] data, int len, XmodeStartHeader startHeader)
{
int validDataLen = 128;
if (XmodeStartHeader.SOH == startHeader)
{
validDataLen = 128;
}
else if (XmodeStartHeader.STX == startHeader)
{
validDataLen = 1024;
}
else
{
throw new Exception("XmodePacketManager:错误头长度");
}
if (data.Length < len)
{
throw new Exception("XmodePacketManager:数据长度小于所需长度");
}
if (len > 255 * validDataLen)
{
throw new Exception("XmodePacketManager:数据长度超过一次传输的最大长度");
}
packetList = new List <XmodePacket>();
int fullLen = len / validDataLen;
int remainLen = len % validDataLen;
for (int i = 0; i < fullLen; i++)
{
var array = new byte[validDataLen];
Array.Copy(data, i * validDataLen, array, 0, validDataLen);
var packet = new XmodePacket(startHeader, (byte)(i + 1), data, validDataLen);
packetList.Add(packet);
}
if (remainLen != 0)
{
var dataArray = new byte[remainLen];
Array.Copy(data, fullLen * validDataLen, dataArray, 0, remainLen);
var packet = new XmodePacket(startHeader, (byte)(fullLen + 1), data, remainLen);
packetList.Add(packet);
}
}
