The Design of the Measurement Software Based Virtual Instrument and VMEbus

This paper presents the design of Virtual Instrument technique based VMEbus,Which has been applied in BESⅢ Main Drift Chamber Electronics successfully. This design,developed in LabVIEW and VC++ 6.0,has realized the communication between LabVIEW and data acquisition card non-NI. LabVIEW and its DLL calling mechanism are introduced briefly. Testing functions of the software,as well as its user interfaces,are described in detail.