AioGetCntComparisonMode


Function

Retrieves the counter operation as the comparison count match occurred.

Format

Ret = AioGetCntComparisonMode ( 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.POINTER(ctypes.c_short) ]
Specifies the address of the variable that stores the operation mode.
CntMode has the following meanings in bit.

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.

15010

The value of CntChannel is outside the designated range of the function

15011

Pointer to CntMode is NULL
Specify the address of variable to parameter.

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.

25010

The value of CntChannel is outside the designated range of the device being used

Initial values

CntMode = 0

Remarks

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

Example

Retrieves the counter operation for channel 0.

C, C++

long Ret;
short CntMode;
Ret = AioGetCntComparisonMode ( Id , 0 , &CntMode );
 

Python

Ret = ctypes.c_long()
CntMode = ctypes.c_short()
Ret.value = caio.AioGetCntComparisonMode ( Id , 0 , ctypes.byref(CntMode) )
 

See also

AioSetCntComparisonMode