Teledyne Princeton Instruments PICam 5.x, Programmer'S Manual

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252 PICam™ 5.x Programmer’s Manual Issue 11
7.4.9.7 PicamAdvanced_RegisterForExtrinsicFloatingPointValueChanged()
Description
PicamAdvanced_RegisterForExtrinsicFloatingPointValueChanged()
registers a function to call when the floating point value for specified hardware
parameter has changed due to external influences (e.g., representing the status of
hardware).
NOTE:
Multiple functions may be registered. When this is the case,
the functions are called in the order in which they have
been registered.
Registered callbacks are called asynchronously on another thread.
NOTE:
PicamAdvanced_UnregisterForExtrinsicFloatingPo
intValueChanged()
must be called to unregister each
callback once it is no longer required.
Syntax
The syntax for
PicamAdvanced_RegisterForExtrinsicFloatingPointValueChanged()
is:
PICAM_API PicamAdvanced_RegisterForExtrinsicFloatingPointValueChanged(
PicamHandle device_or_accessory,
PicamParameter parameter,
PicamFloatingPointValueChangedCallback changed);
Input Parameters
Input parameters for
PicamAdvanced_RegisterForExtrinsicFloatingPointValueChanged()
are:
Output Parameters
There are no output parameters associated with
PicamAdvanced_RegisterForExtrinsicFloatingPointValueChanged()
.
Related APIs
For additional information, refer to the following related APIs:
• PicamAdvanced_UnregisterForExtrinsicFloatingPointValueChanged()
.
device_or_accessory: Handle for the hardware for which the callback is being
registered.
parameter:
The parameter for which the callback is being registered.
changed:
The name assigned to the callback function being registered.