Sensoray 711 Bedienungsanleitung PDF herunterladen (Seite 29)

30 Sensoray Model 711 Instruction Manual

Returns

The function returns 0 in case of success, or an error code.

Notes

The SX11.dll handles the interrupts by creating a parallel thread, which wakes up when an

allowed interrupt occurs. The system part of the interrupt handling procedure copies the

necessary data to the global variable of INT_DATA type pointed to by pIntData, and calls

the user function pointed to by the func member of INT_DATA. The INT_DATA structure

contains the following members:

Member Description

hfg Frame grabber handle. Selects the frame grabber.

mask Interrupt mask. Setting mask to 0 disables interrupts.

Setting mask to the following values (which can be ORed)

allows specific interrupts:

Value Description

STATUS_READY Frame acquisition complete.

STATUS_VIDEO Video status changed at the input

(e.g. present to absent).

STATUS_HLOCK Horizontal lock condition changed at the

input.

STATUS_OFLOW Overflow detected.

STATUS_HSYNC Start of new line.

STATUS_VSYNC Start of new field.

STATUS_FMT Video format change detected

(e.g. NTSC to PAL).

STATUS_ERROR Transfer error occurred. This is a combination

of bits.

status Frame grabber status. The meaning of the individual bits corresponds

to that of the interrupt mask. The value of status is set when the

interrupt occurs.

func Pointer to the user interrupt handling function. The function should

return a DWORD, and take no arguments.

priority An integer specifying the interrupt handling thread priority

level. Takes

the following values:

THREAD_PRIORITY_LOWEST,

THREAD_PRIORITY_BELOW_NORMAL,

THREAD_PRIORITY_NORMAL,

THREAD_PRIORITY_ABOVE_NORMAL,

THREAD_PRIORITY_HIGHEST,

THREAD_PRIORITY_TIME_CRITICAL.

total Total number of interrupts that occurred since X11_InterruptOn was

called.

lost The number of interrupts not processed. The interrupts that occur

while

the user function is executing.

The data can be exchanged between the main application and user function via a global

variable, like shown in the example below. By default all interrupts are masked, that is

turned off, at the reset. To unmask (allow) the interrupt, X11_InterruptUnmask function has

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 35 36

Kommentare zu diesen Handbüchern

Keine Kommentare

Sensoray 711 Bedienungsanleitung Seite 29

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Hardware Sensoray 711