/// <summary>
/// 组帧
/// </summary>
/// <param name="obis">obis码</param>
/// <param name="isWrite">true:WriteCommand, false:ReadCommand</param>
/// <param name="parameter">obis参数</param>
/// <returns>待发送的数据帧</returns>
private byte[] GetCommand(string obis, bool isWrite, string parameter)
{
List <byte> command = new List <byte>();
if (isWrite)
{
command.AddRange(new byte[] { 0x01, 0x57, 0x31, 0x02 }); //SOH W1 STX
}
else
{
command.AddRange(new byte[] { 0x01, 0x52, 0x31, 0x02 }); //SOH R1 STX
}
command.AddRange(Encoding.ASCII.GetBytes(obis)); //OBIS码
command.Add(0x28); //左括号
if (!string.IsNullOrEmpty(parameter))
{
command.AddRange(Encoding.ASCII.GetBytes(parameter)); //obis参数
}
command.Add(0x29); //右括号
command.Add(0x03); //ETX
//计算数据帧的BCC值
byte bcc = IecBcc.Calculate(command.ToArray(), 1, command.Count - 1);
command.Add(bcc); //BCC
return(command.ToArray());
}
public void Write(string obis, byte[] binData, uint address)
{
List <byte> sendBuffer = new List <byte>();
sendBuffer.AddRange(new byte[] { 0x01, 0x57, 0x31, 0x02 });
sendBuffer.AddRange(Encoding.ASCII.GetBytes(obis));
sendBuffer.AddRange(new byte[] { 0x28, 0x30, 0x78 }); //左括号
sendBuffer.AddRange(Encoding.ASCII.GetBytes(address.ToString("X")));
sendBuffer.Add(0x2C);
StringBuilder sb = new StringBuilder();
foreach (byte b in binData)
{
sb.AppendFormat("{0:X2}", b);
}
//sendBuffer.AddRange(binData);
sendBuffer.AddRange(Encoding.ASCII.GetBytes(sb.ToString()));
sendBuffer.Add(0x29); //右括号
sendBuffer.Add(0x03); //ETX
//计算数据帧的BCC值
byte bcc = IecBcc.Calculate(sendBuffer.ToArray(), 1, sendBuffer.Count - 1);
sendBuffer.Add(bcc); //BCC
WriteCommand(sendBuffer.ToArray(), timeoutValue);
}
/// <summary>
/// 解析完整应答信息
/// </summary>
/// <param name="recvData">应答数据帧</param>
/// <returns>返回应答信息括号里面的内容</returns>
public string ParseReply(byte[] recvData)
{
int head = Array.IndexOf(recvData, (byte)0x02);
int tail = Array.IndexOf(recvData, (byte)0x03);
if (head == -1 || tail == -1 || tail - head < 3) //未找到帧头、帧尾，数据帧不完整。完整帧：STX (data) ETX BCC，至少6位
{
throw new CommunicationException(Resources.IncompleteData);
}
//计算数据帧BCC值
byte bcc = IecBcc.Calculate(recvData, head + 1, tail);
if (tail == recvData.Length - 1) //无校验位
{
throw new CommunicationException(Resources.IncorrectResponse);
}
//检验失败,BCC错误
if (bcc != recvData[tail + 1])
{
throw new CommunicationException(Resources.IncorrectResponse);
}
//以下处理的是正确帧
//找左括号
int leftBracketIndex = Array.IndexOf(recvData, (byte)0x28);
//找右括号
int rightBracketIndex = Array.IndexOf(recvData, (byte)0x29);
byte[] resultArray = new byte[rightBracketIndex - leftBracketIndex - 1];
//将括号里的内容拷贝到结果数组resultArray中
Array.ConstrainedCopy(recvData, leftBracketIndex + 1, resultArray, 0, rightBracketIndex - leftBracketIndex - 1);
return(Encoding.ASCII.GetString(resultArray));
}