Agilent Technologies InfiniiVision 2000 X-Series, Руководство программиста, Страница: 862 / 930

862 Agilent InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide
38
Programming Examples
bFirstError = false;
}
Console.Write(strInstrumentError);
}
} while (!strInstrumentError.ToString().StartsWith("+0,"));
}
private void OpenResourceManager()
{
int nViStatus;
nViStatus =
visa32.viOpenDefaultRM(out this.m_nResourceManager);
if (nViStatus < visa32.VI_SUCCESS)
throw new
ApplicationException("Failed to open Resource Manager");
}
private void OpenSession()
{
int nViStatus;
nViStatus = visa32.viOpen(this.m_nResourceManager,
this.m_strVisaAddress, visa32.VI_NO_LOCK,
visa32.VI_TMO_IMMEDIATE, out this.m_nSession);
CheckVisaStatus(nViStatus);
}
public void SetTimeoutSeconds(int nSeconds)
{
int nViStatus;
nViStatus = visa32.viSetAttribute(this.m_nSession,
visa32.VI_ATTR_TMO_VALUE, nSeconds * 1000);
CheckVisaStatus(nViStatus);
}
public void CheckVisaStatus(int nViStatus)
{
// If VISA error, throw exception.
if (nViStatus < visa32.VI_SUCCESS)
{
StringBuilder strError = new StringBuilder(256);
visa32.viStatusDesc(this.m_nResourceManager, nViStatus,
strError);
throw new ApplicationException(strError.ToString());
}
}
public void Close()
{
if (m_nSession != 0)
visa32.viClose(m_nSession);
if (m_nResourceManager != 0)
visa32.viClose(m_nResourceManager);
}
}
}