CntSetDigitalFilter

Function

Sets the digital filter value.

Format

Ret = CntSetDigitalFilter ( Id , ChNo , FilterValue )

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.

FilterValue [ C, C++ : short] [Python: ctypes.c_short]
Sets the digital filter value by coefficient. Select the digital filter value from the following table.

Coefficient	Devices with high-performance counter	Devices with Usual Counter
0h	Not used	0.1us
1h	0.1μs	6.5us
2h	0.2μs	25.7us
3h	0.4μs	32.1us
4h	0.8μs	204.9us
5h	1.6μs	211.3us
6h	3.2μs	230.5us
7h	6.4μs	236.9us
8h	12.8μs	819.3us
9h	25.6μs	825.7us
Ah	51.2μs	844.9us
Bh	102.4μs	851.3us
Ch	204.8μs	1024.1us
Dh	409.6μs	1030.5us
Eh	819.2μs	1049.7us
Fh	1638.4μs	1056.1us

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.

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

Initial Value

Coefficient=0

Remarks

Specifies the digital filter for the specified channel.
The setting in this function is effective after the counter starts.

Example

C, C++	Ret = CntSetDigitalFilter(Id, ChNo, FilterValue);
Python	gin-left: 0;">Ret = ccnt.CntSetDigitalFilter(Id, ChNo, FilterValue)