Vision Systems VScom 200E PCIex Instrukcja Użytkownika Pobierz pdf (Strona 29)

4 Windows Driver

VScom Advanced Port Settings The Microsoft driver for Com1/2 provides some control of FIFO

conﬁguration. The Advanced Settings are for similar purposes, but with extended functions.

Figure 16: Advanced Settings 16C950

The VScom H- and E-series cards use a 16C950 UART to transmit data. This chip and the driver

can emulate a variety of other UARTS. We suggest to use the standard value of 16950, the driver

is optimized for this. If the driver is used for other VScom series, a diﬀerent UART may be

implemented. The available emulations depend on this. At least a 16550 is possible with all series.

The possible settings for FIFO control depend on the chosen emulation.

Here the elements one by one

UART type This is to choose the emulation. The UARTS of type 16450 and 8250 operate without

FIFO. We suggest to use the highest possible setting for best operation.

Use Memory Access Instead of operating the UART via I/O, it is possible to operate it via Memory

Access. In critical systems this can save a little amount of performance. It may be worth a

try, however VScom recommends to stay with the box unchecked.

July 2011 VScom Industrial Card User Manual 29

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Vision Systems VScom 200E PCIex Instrukcja Użytkownika Strona 29