Motorola DSP Developer's Kit

Declaring Input and Output Objects

Note    You must enclose code that generates exceptions within a try block. Each try block is followed by one or more catch blocks, which specify the type of exception that can be caught and handled. This is the standard C++ exception handling mechanism.

Pointers to MOTDSP_Input or MOTDSP_Output objects are created outside the try block of the MEX-file for all possible input and output arguments.

For example,

MOTDSP_Input* a             = PTR_NIL;
MOTDSP_Input* b             = PTR_NIL;
MOTDSP_Output* y            = PTR_NIL;
MOTDSP_Output* index        = PTR_NIL;

Validation.   Outside the try block, the MOTDSP_Config class parses the argument list and provides methods to gain access to the actual arguments. Use the supplied MOTDSP_CONFIG macro. This generates the following variables for use throughout the MEX-file.

char* MOTDSP_cmdfile  = config.GetCommandFile(); 
char* MOTDSP_partname = config.GetProcessorType(); 
int MOTDSP_data_inputs = config.GetFixedInputs(); 
int MOTDSP_dsptype = config.GetDspFamilyType();

Inside the try block, the MOTDSP_FuncVar class validates the function arguments. Use the supplied MOTDSP_FUNCVAR(nrhs,nlhs) macro.

MATLAB MEX-Files

Instantiating Input and Output Objects