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3.1.2.
VB
Select the 'VB' folder that corresponds to your driver installation (section
3.1.1). You'll find here a full illustration in VB 5.0 (named "EncPciTest") that
demonstrates how to use the various functions to communicate with the card.
There are two versions: one using the ActiveX control, the other using the
DLL. The DLL-based version includes an Eic325PciDll.bas file that contains
the Declare's of all the DLL functions. There are no such Declare's in the
ActiveX control-based version, as the definitions are included in the control
itself. At application start the Active property is set to 1, and in the end to 0.
The EncPciTest program illustrates all the functions available. It's
recommended for any user, not only the VB programmer, to run it. Most of
the program is straightforward. Here are some highlights to explain the non-
trivial aspects:
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To check primary communication with the card, use the "LEDs" frame.
The two LEDs on the card should follow your selection.
By definition, the program intends to illustrate the basic functions in
order to instruct the programmer code his application. However, to get
some better feeling, there's the "Loop" mode that "Clicks" cyclically:
In the Position Counter frame:
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ALL in the Req. (=Request) column
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A, B, C, D in the Read column
In the I/O frame:
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Read in the Chip #1 square
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Read in the Chip #2 square
The Active Chip frame:
The required chip is selected automatically upon running any
operation. The significance of explicit chip selection by this frame is
first to illustrate this operation to the programmer and second to
determine on which chip the "Test Active Chip", if clicked, would
operate.
The I/O frame is a bit confusing:
The Hardware General Inputs are reflected by the card in its
software OUTPUTS.
The Voltage Failure card's software output allows the user to check
if there is a short-circuit between the output voltage source and the
encoders (the thermal resettable fuse in the card will resume normal
operation after the short is ended). Voltage Failure = 1 indicates a
short, and the user should be instructed in this case to detach the 44
pin connector, then re-check.
The EventFlags appear in two separate outputs:
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Software Outputs
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Hardware Outputs
Clicking "Read" reads card's software outputs of the –
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Hardware General Inputs
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Voltage Failure
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Software EventFlags
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