CntSetInputHardwareEvent

Function

Sets the hardware event of the control input signal. Supports multi-processing.

Format

Ret = CntSetInputHardwareEvent ( Id , ChNo , EventType , RF0 , RF1 , Reserved )

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.

EventType [ C, C++ : int] [Python: ctypes.c_int]
Specify the kind of hardware event of control input signal. The set operation is executed, when the specified condition is satisfied. The hardware event of the control input signal is set in from the following values.

Definition	Value	Description
CNT_IEVENT_GENINP	0	General-purpose input
CNT_IEVENT_STARTSTOP	1	Counter start/stop
CNT_IEVENT_PRESET	2	Count value preset
CNT_IEVENT_CLEAR	3	Count value zero clear

RF0,RF1 [ C, C++ : short] [Python: ctypes.c_short]
Sthat the specified event is performed on whether the rising or falling of the control input signal. For presetting count value or 0-clearing count value, set the condition with RF0. For counter start/stop, set the condition for start with RF0, set the condition for stop with RF1.

Definition	Value	Description
CNT_INP_NONE	0	Not executed
CNT_INP_RIZE	1	Executing by rising
CNT_INP_FALL	2	Executing by falling

Reserved [ C, C++ : short] [Python: ctypes.c_short]
Specify 0.

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_MODE	10100	Invalid mode setting.
CNT_ERR_SYS_MODE	20100	Invalid mode setting.
CNT_ERR_SYS_CH_NO	20201	Channel number is outside the range.
CNT_ERR_SYS_EVENT_TYPE	20302	The kind of hardware event is out of range.
CNT_ERR_SYS_INPUT_LOGIC	20304	The coefficient of one-shot pulse width is out of range.

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

Remarks

This function should be executed before starting the counter.

The case of set Count value preset(CNT_IEVENT_PRSET) on EventType arrgument,
it will be loaded Preset value set by CntSetPresetRegister function at the moment the hardware event's condition is met.

Example

C, C++	Ret = CntSetInputHardwareEvent (Id, 0, CNT_IEVENT_STARTSTOP, CNT_INP_FALL, CNT_INP_FALL, 0);
Python	Ret = ccnt.CntSetInputHardwareEvent (Id, 0, ccnt.CNT_IEVENT_STARTSTOP, ccnt.CNT_INP_FALL, ccnt.CNT_INP_FALL, 0)