CntSetCarryBorrowEvent

Function

Sets the factor for carry/borrow event.

Format

Ret =CntSetCarryBorrowEvent ( Id , Start )

Parameters

Id [ C: short ] [ Python: ctypes.c_short ]
Specifies the device ID retrieved from CntInit.

Start [ C: short ] [ Python: ctypes.c_short ]
Specifies whether to start the notification of carry/borrow by one of the following defined values.

Definition	Value	Description
CNT_CB_STOP	0	Mask the interrupt
CNT_CB_START	1	Enable the interrupt

Return Value

Ret [ C: long ] [ Python: ctypes.c_long ]

Definition	Value	Description
CNT_ERR_SUCCESS	0	Normal Complete
CNT_ERR_DLL_INVALID_ID	10001	Invalid ID is specified.
CNT_ERR_DLL_CALL_DRIVER	10002	Driver cannot be called (failed in ioctl).
CNT_ERR_DLL_CREATE_THREAD	10005	Failed in creating thread.
CNT_ERR_SYS_NOT_SUPPORTED	20001	This function can't be used by this device.

The other errors: (See also: Details of Error Code)

Remarks

It is the function which accept the interrupt by using the carry/borrow interrupt function of hardware. Callback function actually accepts the interrupt. Callback is specified in CntSetCarryBorrowCallbackProc.

For CPI-CNT-3201I
Only one process can receive events.
Message cannot be sent to multiple processes from the same device.

For Ethernet devices
  If communication with the device is lost, the process will be unregistered and events will no longer be notified.
  If you want to perform event notification again, please make the settings again using this function.

  You can check the registration status of the current process using the CntGetNetCommunicationInfo function.

Example

C	Ret = CntSetCarryBorrowEvent (Id, Start);
Python	Ret = ccnt.CntSetCarryBorrowEvent (Id, Start)