Is it possible to have multiple Callback functions, i.e. to do more than one 'imgSessionWaitSignalAsync2(...)' call With the same session ID?
As it would be e.g. in ...:
void NI_grab::StartGrabNow(bool bMaster)
{
bIsMaster = bMaster ;
iFrameNumber = 0 ;
iReturnValue1 = imgSessionStartAcquisition(siSessionId) ;
timeBeginPeriod(1) ;
iReturnValue1 = imgSessionWaitSignalAsync2(
siSessionId,
IMG_SIGNAL_STATUS,
IMG_FRAME_DONE,
IMG_SIGNAL_STATE_RISING,
&xSessionWaitSignalCallbackPadTimeStamp,
this
)
;
// The 'xSessionWaitSignalCallbackPadTimeStamp' will put the time stamps in a queue buffer, ...
iReturnValue2 = imgSessionWaitSignalAsync2(
siSessionId,
IMG_SIGNAL_STATUS,
IMG_BUF_COMPLETE,
IMG_SIGNAL_STATE_RISING,
&xSessionWaitSignalCallbackProcessImage,
this
)
;
bStoppingAcquisition = bAllGrabbersStoppingAcquisition = false ;
// ... which is read by 'xSessionWaitSignalCallbackProcessImage', so that the
// time stamps are padded into the correct images.
// I consider it fully possible that there are sometimes "two or three" acquired images
// in the "input FIFO pipes"....
bInterfaceOK = (iReturnValue == 0) ;
bAcquisitionRunning = true ;
}
Best regards
Staffan Cronström
