public PressureMeterArgs(PressureMeterArgs data)
: base(null)
{
this.Unit = data.Unit;
this.PressureValue = data.PressureValue;
this.ErrorMessage = data.ErrorMessage;
}
/// <summary>
/// 用于正式接收串口设备的数据
/// -32768 ~ 32767在此范围的值，当传过来的值超过32767时一定是负值，此时要异或0xFFFF后再加1补码是为负数的绝对值
/// 数据格式：以一对大括号开始结束，共9个字节
/// { DP D5 D4 D3 D2 D1 UNIT }\{ E R R O R 0 1 }\{ E R R O R 0 2 }\{ E R R O R 0 3 }
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
public override void ReceiveData(object sender, DataTransmissionEventArgs args)
{
byte[] temp = new byte[_detectByteLength];
try
{
lock (m_ReadBuffer)
{
m_ReadBuffer.AddRange(args.EventData);
}
PressureMeterArgs para = Analyze(m_ReadBuffer);
if (para != null)
{
base.ReceiveData(sender, para);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
throw ex;
}
}
/// <summary>
/// 对压力表数据进行解析,分别生成数据和单位
/// </summary>
/// <param name="eventData"></param>
/// <returns></returns>
private PressureMeterArgs Analyze(List <byte> eventData)
{
PressureMeterArgs args = null;
if (eventData != null && eventData.Count < _detectByteLength)
{
return(null);
}
byte[] buffer = new byte[_detectByteLength];
bool bFind = false;
lock (m_ReadBuffer)
{
while (eventData.Count >= _detectByteLength)
{
if (eventData[0] != 0x7B)
{
eventData.RemoveAt(0);
continue;
}
else
{
if (eventData[_detectByteLength - 1] != 0x7D)
{
eventData.RemoveAt(0);
continue;
}
else
{
bFind = true;
eventData.CopyTo(0, buffer, 0, _detectByteLength);
eventData.RemoveRange(0, _detectByteLength);
}
}
}
}
if (bFind)
{
//小数点错误
if (buffer[1] > 0x33 || buffer[1] < 0x30)
{
return(null);
}
//单位错误
if (buffer[7] > 0x37 || buffer[1] < 0x30)
{
return(null);
}
for (int iLoop = 2; iLoop <= 6; iLoop++)
{
if (buffer[iLoop] < 0x30 || buffer[iLoop] > 0x39)
{
return(null);
}
}
int D5 = (buffer[2] - 0x30) * 10000;
int D4 = (buffer[3] - 0x30) * 1000;
int D3 = (buffer[4] - 0x30) * 100;
int D2 = (buffer[5] - 0x30) * 10;
int D1 = (buffer[6] - 0x30);
int total = D1 + D2 + D3 + D4 + D5;
if (total > 0xFFFF) //错误数字
{
return(null);
}
ushort num = 0;
float sum = 0;
if (total > 32767) //负数
{
num = (ushort)total;
num = (ushort)(num ^ 0xFFFF + 0x0001);
sum = -1 * num;
}
else
{
num = (ushort)total;
sum = num;
}
switch (buffer[1])
{
case 0x31:
sum *= 0.1f;
break;
case 0x32:
sum *= 0.01f;
break;
case 0x33:
sum *= 0.001f;
break;
}
PressureUnit unit = (PressureUnit)(buffer[7] - 0x30);
//单位换算，统一为KPa
switch (unit)
{
case PressureUnit.MPa:
sum = sum * 1000;
break;
default:
break;
}
args = new PressureMeterArgs(unit, sum);
return(args);
}
else
{
return(null);
}
}
