AioSetCntComparisonMode

Function

Sets the counter operation as comparison count match occurs.

Format

Ret = AioSetCntComparisonMode ( Id , CntChannel , CntMode )

Parameters

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

CntChannel [ C, C++ : short ] [ Python : ctypes.c_short ]
Sets the channel of counter.

CntMode [ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the operation mode from the following range in macro or numerical value.
CntMode has the following meanings in bit, it can be specified by a combination of these bits.

Operation mode	Macro	Value
Preset count value load	CNT_LOADPRESET	00000001H
Comparison count value load	CNT_LOADCOMP	00000002H

Return values

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

Return values	Content
0	Normality completion
7	Execute AioResetDevice function because the device has recovered from standby mode
10001	Invalid Id was specified Use the Id retrieved from AioInit to specify the Id in this function.
10002	AIO driver can't be called At first, perform AioInit function.
15000	The value of CntChannel is outside the designated range of the function
20001	This function can't be used by this device
20002	Can not use while by another device works To use this function, counter operation must be stopped.
20003	Can not use because another process is using the device When another process is using the device, all functions except for those that support multi-process can not be performed.
25000	The value of CntChannel is outside the designated range of the device being used
25002	Operation mode 'preset count value load' is not enable
25003	Operation mode 'Comparison count value load' is not enable

Initial values

CntMode = 0
In this case, "Preset count value load" and "Comparison count value load" are always fixed to 0.

Remarks

The function sets the counter operation after the comparison count match.

If "Preset count value load" is set as operation mode, the count value will move to the preset value set in advance after comparison count match.
If the value is set, you must set the preset value using the function AioSetCntPresetReg.
If the preset value isn't set, it becomes the initial value 0.

If "Comparison count value load" is set as operation mode, the next comparison count value after comparison count match will be updated to the value that is set by AioSetCntComparisonReg.
If the value is set, you must set the comparison count value using the function AioSetCntComparisonReg.
If the comparison count value isn't set, it becomes the initial value 0.

This function cannot be used on devices without counter functionality.
If the device is in operation, the function cannot be performed.

In the case of Analog L Series
- Even if CNT_LOADPRESET is specified, it's not valid.
- When the comparison count match has occurred, the count value is cleared to zero.

Specifications based on devices

AI-1664UG-PE AIO-163202G-PE AIO-163202UG-PE AIO-123202G-PE AIO-123202UG-PE AIO-163202F-PE ADA16-32/2(PCI)F	All operation mode can be used.
AIO-160802L-LPE ADA16-8/2(LPCI)L ADAI16-8/2(LPCI)L AIO-160802LI-PE	All operation mode can be used.
AI-1616L-LPE AD16-64(LPCI)LA AD16-16(LPCI)L ADI16-16(LPCI)L AI-1616LI-PE AI-1664LA-LPE	All operation mode can be used.
AO-1604L-LPE DA16-16(LPCI)L DA16-8(LPCI)L DA16-4(LPCI)L DAI16-4(LPCI)L AO-1604LI-PE AO-1608L-LPE AO-1616L-LPE	All operation mode can be used.
AIO-163202FX-USB	All operation mode can be used.
AIO-121602LN-USB AIO-120802LN-USB	All operation mode can be used.
AI-1664LAX-USB	All operation mode can be used.
AO-1604LX-USB	All operation mode can be used.

Example

Sets "Preset count value load" as the operation mode for channel 0.

C, C++	long Ret; Ret = AioSetCntComparisonMode ( Id , 0 , CNT_LOADPRESET );
Python	Ret = ctypes.c_long() Ret.value = caio.AioSetCntComparisonMode ( Id , 0 , caio.CNT_LOADPRESET )