Programming Guide
115
5.4.2.4 Trigger Input Polarity
Purpose
These functions read or write the polarity of external trigger signal.
HDV62 captures a frame when Trigger Input is enabled and the
state of polarity is reached.
Prototype
C/C++
HRESULT TriggerIn_WritePolarity (UINT Value)
HRESULT TriggerIn_ReadPolarity (UINT *Value)
C#
int TriggerIn_WritePolarity (uint Value)
int TriggerIn_ReadPolarity (out uint Value)
VB.Net
TriggerIn_WritePolarity (ByVal Value As UInteger) As
Integer
TriggerIn_ReadPolarity (ByRef Value As UInteger) As
Integer
Parameters
Value
The polarity of trigger input. Could be one of the following
values:
0: rising edge
1: falling edge
Return Value
No error occurs if return value >= 0; if negative value, call AMGet-
ErrorText function to get error information about return codes.
Содержание HDV62
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