DioSetInterruptCallBackProc

Function

Specifies the interrupt event call back function.

Format

Ret = DioSetInterruptCallBackProc ( Id , CallBack , Param )

Parameters

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

CallBack [C:PDIO_INT_CALLBACK] [Python: PDIO_INT_CALLBACK]
Specifies address of call back function.
Please pay attention, call back function is specified by function pointer, but the specification method varies with the language.

Param [C:void *] [Python: ctypes.c_void_p]
Specifies the optional parameter to be passed to the call back function.

Return Value

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

Definition	Value [Dec]	Description
DIO_ERR_SUCCESS	0	Normal complete
DIO_ERR_DLL_INVALID_ID	10001	Invalid ID is specified.
DIO_ERR_DLL_CALLBACK	10400	Address of call back function is invalid.

The other errors: (See also: Error code details)

Remarks

Interrupt function is a function that uses the hardware function to monitor the change of the specified bit's input value.
When the input value of the bit changes from 0 to 1 or from 1 to 0, the system notifies the change of bit to application through the call back.
After the setting of interrupt call back was executed, the interrupt event setting is executed, when interrupt occurs, the set call back function is called.

Example

C	Ret = DioSetInterruptCallBackProc ( Id , CallBack , Param );
Python	Ret = cdio.DioSetInterruptCallBackProc ( Id , CallBack , Param )