CntSetSamplingInternalClock

Function

Sets the internal clock value.

Format

Ret = CntSetSamplingInternalClock ( Id , Clock , Unit )

Parameters

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

Clock [C: int] [Python: ctypes.c_int]
Specify the clock value. The result value of clock value and clock value unit can be set in the following range with clock value unit.

Device	Available Range
CNT-3204IN-USB	2us <= Clock <= 107sec (25ns unit)

Unit [C: short] [Python: ctypes.c_short]
Clock value unit

Definition	Value	Description
CNTS_TIM_UNIT_S	1	1sec unit
CNTS_TIM_UNIT_MS	2	1ms unit
CNTS_TIM_UNIT_US	3	1us unit
CNTS_TIM_UNIT_NS	4	1ns unit

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_SYS_MEMORY	20000	It failed in memory allocation for the object preparation.
CNT_ERR_SYS_USING_OTHER_PROCESS	20003	Cannot use because another process is using the device.
CNT_ERR_SYS_CLOCK_VAL	21009	The clock value is out of range.
CNT_ERR_SYS_CLOCK_UNIT	21010	The unit of clock value is out of range.

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

Initial Value

USB device : 20us

Remarks

In order to make the application operation regular, must set the internal clock value when the internal clock is used. This function should be executed in the setting stage before sampling starts.

Example

C	Ret = CntSetSamplingInternalClock (Id, 500, 2);
Python	Ret = ccnt.CntSetSamplingInternalClock (Id, 500, 2)