CompuScope SDK for L.. - Egmont Instruments

Chapter 2: Overview of CompuScope LabVIEW SDKStructure of CompuScope LabVIEW SDKThe overall structure of the CompuScope LabVIEW SDK and its relation to the GaGeCompuScope Hardware is best described from the bottom up with reference to thediagram below.GaGe Main VIGaGe CsTool VIGaGe CsLv DLL VICsLv.DLLCSSSM.DLLWindows Application Level-------------------------------------------------------------------------------------------------------Windows Kernel LevelGaGe CompuScope driversGaGe CompuScope HardwareAt the lowest level is the CompuScope hardware, which is installed within a slot that isconnected to the host PC. The CompuScope hardware is directly controlled by theCompuScope Windows drivers. The drivers reside at the Windows Kernel level, whichallows direct low-level access to CompuScope hardware registers and to physical PCRAM. The drivers communicate with Windows Applications through a Dynamically LinkedLibrary (DLL) called CSSSM.DLL.Communications through CSSSM.DLL uses the CompuScope Applications ProgrammingInterface (API), which is a set of C subroutine calls that allows control of all CompuScopefunctionality. Above CSSSM.DLL is a small intermediate DLL called CsLV.DLL thatpackages the API calls so that they may be easily called from LabVIEW. AboveCsLV.DLL sits three layers of LabVIEW VIs, called CsLv DLL VIs, CsTool VIs and MainVIs, that will be completely described in this manual.6 CompuScope SDK for LabVIEW for Windows