/// <summary>
/// 处理串口接受到的数据，如果有完整且有效的返回数据，则存入_atrList<T>变量
/// </summary>
private static void ProcessRecvData()
{
if (_recvLen - _procLen < 6)
{
return;
}
int tmpPtr;
do
{
tmpPtr = _procLen;
bool hasSTX = false;
int i = 0;
while (i < _recvLen - tmpPtr)
{
if (_recvBuffer[tmpPtr + i] == 0x02) //查找起始位（0x02）
{
hasSTX = true;
_procLen = tmpPtr + i;
}
else if (_recvBuffer[tmpPtr + i] == 0x03 && hasSTX) //查找结束位（0x03）,且存在起始位
{
i++;
byte[] atrData = CMDUtil.DecodeRecvData(_recvBuffer, _procLen, tmpPtr + i - _procLen);
_procLen = tmpPtr + i;
if (atrData.Length > 4 || atrData[1] + 4 == atrData.Length) // 返回数据长度正常
{
byte crc = 0;
for (int j = 1; j < atrData[1] + 2; j++)
{
crc = (byte)(crc + atrData[j]);
}
if (atrData[atrData[1] + 2] == crc) // 校验和比对
{
_atrList.Add(atrData);
}
}
break;
}
else if (_recvBuffer[tmpPtr + i] == 0x10) // 跳过数据位
{
i++;
}
i++;
}
tmpPtr += i;
} while (tmpPtr < _recvLen);
}
/// <summary>
/// 发送命令
/// 0: 命令完成成功
/// -1: 命令完成失败
/// -16: 命令校验失败
/// -17: 命令错误（没有该命令）
/// -18: 命令参数错误
/// -5：COM口未连接
/// -6：COM口读错误
/// -7：控制板无响应或返回数据不合法
/// </summary>
/// <param name="cmd">命令字节（不包括STX、Len、CRC和ETX）</param>
/// <returns>
/// </returns>
private static int SendCommand(byte[] cmd)
{
int cmdLen = cmd.Length + 4;
byte[] srcCmd = new byte[cmdLen];
srcCmd[0] = 0x02; // STX
srcCmd[1] = (byte)cmd.Length;
Buffer.BlockCopy(cmd, 0, srcCmd, 2, cmd.Length);
srcCmd[cmdLen - 1] = 0x03; // ETX
_isError = false;
_atrList = new List <byte[]>(10);
_recvLen = 0;
_procLen = 0;
_retAtrIndex = -1;
byte cnt = 0;
byte lastAtrCode = 0;
do
{
srcCmd[3] = cnt;
srcCmd[cmdLen - 2] = 0;
for (int i = 1; i < cmdLen - 2; i++)
{
srcCmd[cmdLen - 2] += srcCmd[i]; // 计算校验码
}
byte[] sendBuffer = CMDUtil.EncodeCommand(srcCmd);
try
{
_serialPort.Write(sendBuffer, 0, sendBuffer.Length);//发送指令
int timeOut = _timeOut;
do
{
Thread.Sleep(50);
timeOut -= 50;
ProcessRecvData();
for (int i = 0; i < _atrList.Count; i++)
{
byte[] atrData = _atrList[i];
if (atrData[2] != srcCmd[2])
{
continue;
}
if (atrData[4] == 0x00)
{
_retAtrIndex = i;
return(0);
}
else
{
lastAtrCode = atrData[4];
}
}
}while (!_isError && timeOut > 0);
}
catch (Exception ex)
{
_log.Error("出票机构控制板指令发送错误！指令：" + BitConverter.ToString(sendBuffer).Replace('-', ' '), ex);
}
cnt++;
} while (cnt <= _retryTimes);
if (lastAtrCode != 0x00)
{
return(-lastAtrCode);
}
else if (_isError)
{
return(-6); //COM口读错误
}
else
{
return(-7); //IO板无响应或返回异常
}
}