CntSetCountMatchEvent

Function

Sets the factor for count-match event.

Format

Ret = CntSetCountMatchEvent ( Id , ChNo , RegNo , Count , Start )

Parameters

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

ChNo [ C, C++ : short] [Python: ctypes.c_short]
Specifies the channel number which you want to set.

RegNo [ C, C++ : short] [Python: ctypes.c_short]
Specifies the compare register number.

Allowable range:

Device with high-performance counter : 0 or 1

Device without high-performance counter : Fixed 0

Count [ C, C++ : unsigned long] [Python: ctypes.c_ulong]
Specify the setting c to comparison register.
Allowable range:
24-bit counter data : 0H <= Count <= FFFFFFH
32-bit counter data : 0H <= Count <= FFFFFFFFH

Start [ C, C++ : short] [Python: ctypes.c_short]
Specifies whether to start the comparison by one of the following defined values.

Definition	Value	Description
CNT_MATCH_STOP	0	Mask the interrupt
CNT_MATCH_START	1	Enable the interrupt

Return Value

Ret [ C, 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_USING_OTHER_PROCESS	20003	It cannot perform because the other process is using the device.
CNT_ERR_SYS_CH_NO	20201	Channel number is outside the range.
CNT_ERR_SYS_CH_VALUE	20203	Counter value is outside the range.

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

Initial Value

The initial value of comparison register is 0.

Remarks

It is the function which accept the interrupt by using the count-match interrupt function of hardware.
Callback function actually accepts the interrupt.
Callback is specified in CntSetCountMatchCallBackProc.

When using CPSN-CNT-3201I in combination with CPSN-MCB271-xxx
By using this function, the comparison value of the count that outputs a one-shot pulse can be set.
However, event notification to the application cannot be performed.

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, C++	Ret = CntSetCountMatchEvent ( Id , ChNo , RegNo , Count , Start );
Python	Ret = ccnt.CntSetCountMatchEvent ( Id , ChNo , RegNo , Count , Start )