/// <summary>
/// 根据指令创建指定数据项对象（代码未完成）
/// </summary>
/// <returns></returns>
public DataItem getDataItem(byte ser)
{
byte[] cmdData = strToToHexByte(_cmd.DataCommand);
//重新编写指令序列号
cmdData[2] = ser;
if (_cmd.Identification == "A013" && _cmd.ControlCode == 0x04)
{
cmdData[3] = ser;
}
DataItem item = null;
switch ((ControlCode)_cmd.ControlCode)
{
case ControlCode.ReadData:
//读数据指令
item = new DataItem_ReadData_ASK(cmdData);
break;
case ControlCode.WriteData:
//写数据
item = getWriteDataAskItem(cmdData);
break;
case ControlCode.ReadKeyVersion:
//读Key版本号
break;
case ControlCode.ReadMeterAdress:
//读地址
break;
case ControlCode.WriteMeterAdress:
//写地址
break;
case ControlCode.WriteMeterNum:
//写表底
break;
case ControlCode.CYReadData:
//读参数
item = getCYReadDataAskItem(cmdData);
break;
case ControlCode.CYWriteData:
//创源内部写指令（参数设置）
item = getCYWriteDataAskItem(cmdData);
break;
case ControlCode.CTR_6: //主动上报数据中
item = new DataItem_C001(cmdData);
break;
default:
break;
}
return(item);
}
private TaskArge JieXi(byte[] buffer, out string message)
{
message = "";
int index = 0;//查找报文头
for (int i = 0; i < buffer.Length - 2; i++)
{
if (buffer[i] == 0XFE && buffer[i + 1] == 0X68)
{
index = ++i;
break;
}
}
//检查仪表类型是否为燃气表，不是燃气表，抛弃
if (buffer[index + 1] != 0x30)
{
message = "表类型错误";
return(null);
}
int DataLength = buffer[index + 10];
byte checkSum = 0;
//检查校验码
for (int i = index; i < index + DataLength + 11; i++)
{
checkSum += Convert.ToByte(buffer[i]);
}
if (checkSum != buffer[index + 11 + DataLength])
{
//校验和错误
message = "校验和错误";
return(null);
}
//取出数据部分（该数据为加密数据）
byte[] DATA = new byte[DataLength];
for (int i = 0; i < DataLength; i++)
{
DATA[i] = buffer[i + index + 11];
}
StringBuilder sb = new StringBuilder();
for (int i = index + 8; i > index + 1; i--)
{
sb.Append(string.Format("{0:X2}", buffer[i]));
}
if (this.Mac != sb.ToString())
{
message = string.Format("接收到数据不是给表：{0}的应答数据或请求指令。", this.Mac);
return(null);
}
ControlCode ctrCode = (ControlCode)buffer[index + 9];
// 解密数据
byte[] desData = null;// Encryption.Decry(DATA, MKey);
if (ctrCode == ControlCode.ReadKeyVersion)
{
//读取密钥为明文传输
desData = DATA;
}
else
{
desData = Encryption.Decry(DATA, MKey);
}
//创建数据对象
DataItem item = null;
switch (ctrCode)
{
case ControlCode.ReadData:
//主站请求的读数据操作
item = new DataItem_ReadData_ASK(desData);
break;
case ControlCode.WriteData:
//主站请求的写数据操作
item = getWriteDataAskItem(desData);
break;
case ControlCode.ReadKeyVersion:
break;
case ControlCode.ReadMeterAdress:
break;
case ControlCode.WriteMeterAdress:
break;
case ControlCode.WriteMeterNum:
break;
case ControlCode.CYReadData:
break;
case ControlCode.CYWriteData:
item = getCYWriteDataAskItem(desData);
break;
case ControlCode.CTR_6:
//主动上报数据
break;
case ControlCode.CTR_7:
break;
case ControlCode.CTR_8:
break;
default:
break;
}
return(new TaskArge(this.Mac, item, (ControlCode)buffer[index + 9], this.MKey));
}