/// <summary>
/// 获取 DL/T 645-1997 控制码的文字说明。
/// </summary>
/// <param name="controlCode"></param>
/// <returns></returns>
public static string GetDescription(this DLT645_1997ControlCodeOptions controlCode)
{
switch (controlCode)
{
case DLT645_1997ControlCodeOptions.ReadData:
return("读数据");
case DLT645_1997ControlCodeOptions.ReadNextData:
return("读后续数据");
case DLT645_1997ControlCodeOptions.ReRead:
return("重读数据");
case DLT645_1997ControlCodeOptions.WriteData:
return("写数据");
case DLT645_1997ControlCodeOptions.ProofreadTime:
return("广播校时");
case DLT645_1997ControlCodeOptions.WriteAddress:
return("写通信地址");
case DLT645_1997ControlCodeOptions.UpdateBaudrates:
return("更改通信速率");
case DLT645_1997ControlCodeOptions.UpdatePassword:
return("修改密码");
case DLT645_1997ControlCodeOptions.DemandReset:
return("最大需量清零");
default:
throw new NotImplementedException("尚未实现该枚举。");
}
}
/// <summary>
/// 向电表发送数据。所发送的数据为规约文档所描述帧结构中的“数据域”部分，且无需加0x33。
/// </summary>
/// <param name="controlCode"></param>
/// <param name="sendData">需要发送的数据。该数据为规约文档所描述帧结构中的“数据域”部分，且无需加0x33。</param>
/// <param name="delay"></param>
/// <returns>返回的数据。该数据为规约文档所描述帧结构中的“数据域”部分，且已经过减0x33处理。</returns>
public byte[] SendData(DLT645_1997ControlCodeOptions controlCode, byte[] sendData, int delay)
{
int intIndex = 0;
byte[] bytData = new byte[sendData.Length + 12 + 4];
//前导字节
bytData[intIndex++] = 0xFE;
bytData[intIndex++] = 0xFE;
bytData[intIndex++] = 0xFE;
bytData[intIndex++] = 0xFE;
int intCSStartIndex = intIndex;
byte bytCS = 0;
//帧起始符
bytData[intIndex++] = 0x68;
//地址域
bool bolIsBroadcastAddress = (this.Address == 0);
switch (controlCode)
{
case DLT645_1997ControlCodeOptions.ProofreadTime:
case DLT645_1997ControlCodeOptions.WriteAddress:
bolIsBroadcastAddress = true;
break;
default:
if (bolIsBroadcastAddress == false)
{
long intAddrMod = 1;
for (int iAddr = 0; iAddr < 6; iAddr++)
{
if ((base.Address / intAddrMod) > 0)
{
byte bytAddr = (byte)((base.Address / intAddrMod) % 100);
bytData[intIndex++] = Function.ByteToBCD(bytAddr);
}
else
{
bytData[intIndex++] = 0x00;
}
intAddrMod *= 100;
}
}
break;
}
if (bolIsBroadcastAddress)
{
bytData[intIndex++] = 0x99;
bytData[intIndex++] = 0x99;
bytData[intIndex++] = 0x99;
bytData[intIndex++] = 0x99;
bytData[intIndex++] = 0x99;
bytData[intIndex++] = 0x99;
}
//帧起始符
bytData[intIndex++] = 0x68;
//控制码
bytData[intIndex++] = (byte)controlCode;
//数据长度
bytData[intIndex++] = (byte)sendData.Length;
for (int i = 0; i < sendData.Length; i++)
{
bytData[intIndex++] = (byte)(sendData[i] + 0x33);
}
//校验和
for (int i = intCSStartIndex; i < intIndex; i++)
{
bytCS += bytData[i];
}
bytData[intIndex++] = bytCS;
//结束字符
bytData[intIndex++] = 0x16;
base.OnSendingData(this, bytData);
if (delay >= 0)
{
bytData = base.Parent.SendData(this, bytData, delay);
int intReceiveStartIndex = -1;
for (int i = 0; i < bytData.Length; i++)
{
if (bytData[i] == (byte)0x68)
{
intReceiveStartIndex = i; // 查找0x68
break;
}
}
if (intReceiveStartIndex == -1)
{
throw new Exception("返回的数据(" + Function.OutBytes(bytData) + ")无帧起始符0x68");
}
int intReceiveDataLength = bytData[intReceiveStartIndex + 9]; // 返回的数据长度
int intReceiveCheckSum = 0;
for (int i = intReceiveStartIndex + 0; i <= intReceiveStartIndex + 9 + intReceiveDataLength; i++)
{
intReceiveCheckSum += bytData[i];
}
if ((byte)intReceiveCheckSum != bytData[intReceiveStartIndex + 9 + intReceiveDataLength + 1])
{
throw new Exception("返回的数据(" + Function.OutBytes(bytData) + ")校验错误");
}
byte bytReceiveControl = bytData[intReceiveStartIndex + 8]; // 控制码
switch (controlCode)
{
case DLT645_1997ControlCodeOptions.ReadData:
if (bytReceiveControl == (byte)0xC1)
{
throw new Exception("电表应答异常：" + this.GetErrorContext((byte)(bytData[intReceiveStartIndex + 10] - 0x33)));
}
break;
}
byte[] bytReceiveData = new byte[intReceiveDataLength];
for (int intDataIndex = 0; intDataIndex < intReceiveDataLength; intDataIndex++)
{
bytReceiveData[intDataIndex] = (byte)(bytData[intReceiveStartIndex + 10 + intDataIndex] - 0x33);
}
return(bytReceiveData);
}
else
{
return(null);
}
}