Analog Devices VisualDSP++ 5.0 Service Manual page 392

Port Control Manager API Reference
Return Value
In debug mode, this routine returns one of the following result codes.
Otherwise,
ADI_PORTS_RESULT_SUCCESS
ADI_PORTS_RESULT_SUCCESS
ADI_PORTS_RESULT_NULL_ARRAY
ADI_PORTS_RESULT_BAD_DIRECTIVE
ADI_PORTS_RESULT_PIN_ALREADY_IN_USE
9-14
is always returned.
Function completed successfully.
Address of the
Invalid directive value has been passed.
One of the required pins has already been
assigned a different functionality.
VisualDSP++ 5.0 Device Drivers and System
Services Manual for Blackfin Processors
array is NULL.
Directives