INFICON IQM-233 Thin Film Deposition Controller PCI-Express Card Operating Manual - Manual (Page 68)

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IQM-233 Operating Manual
4.2 DLL Functions
In the function descriptions below, long indicates a 32 bit integer, double indicates
a double precision real. Array parameters require a pointer to the first element of
the array (standard C calling convention).
NOTE: These function definitions are for IQM233.DLL, which supports up to
six IQM-233 or six SQM-242 cards. Contact INFICON for information on
interfacing to the older SQM242.DLL (refer to
section 1.3, How To Contact
INFICON, on page 1-5 ).
Sif142Startup2 (long Mode, long CardStatus (0 to 7))
Loads the DLL and initializes the card. Must be called with Mode=0 before any
other function. The card status parameter is an array that returns card
installation status information
Mode . . . . . . . . . . . . . . . . . . . . . -1 unloads the DLL, any other value loads the
DLL.
CardStatus(0) . . . . . . . . . . . . . . DLL and card installation status. Values >900
are errors.
CardStatus (1 to 6) . . . . . . . . . . Firmware revision of card 1 to 6. Zero
indicates no card found.
Sif142Init (double Xfmax, double Xfmin, double Xinit,
double Period)
Initializes the measurement engine. Must be called before readings are taken.
Xfmax. . . . . . . . . . . . . . . . . . . . . Maximum crystal frequency (6.1 MHz Max).
Any measurement greater than this value will
return a crystal failure.
Xfmin . . . . . . . . . . . . . . . . . . . . . Minimum crystal frequency (4.0 MHz
minimum). Any measurement less than this
value will return a crystal failure.
Xinit . . . . . . . . . . . . . . . . . . . . . . Initial frequency of a new crystal. Usually
either 6.00 MHz or 5.00 MHz. Must be
between Xfmax and Xfmin.
Period . . . . . . . . . . . . . . . . . . . . Sets the time period to collect one
measurement between 0.1 and 2 seconds.