How to access header file variables in c file? f28335 ccs4

Hello!

I'm not able to access variables from park.h file.I'm using ccs4 and TMS320F28335

I have a header file park.h :

/* =================================================================================
File name: PARK.H
===================================================================================*/

#ifndef __PARK_H__
#define __PARK_H__

typedef struct {

_iq Alpha; // Input: stationary d-axis stator variable
_iq Beta; // Input: stationary q-axis stator variable
_iq Angle; // Input: rotating angle (pu)
_iq Ds; // Output: rotating d-axis stator variable
_iq Qs; // Output: rotating q-axis stator variable
_iq Sine;
_iq Cosine;
} PARK;

/*-----------------------------------------------------------------------------
Default initalizer for the PARK object.
-----------------------------------------------------------------------------*/
#define PARK_DEFAULTS { 0, \
0, \
0, \
0, \
0, \
0, \
0, \
}

/*------------------------------------------------------------------------------
PARK Transformation Macro Definition
------------------------------------------------------------------------------*/

#define PARK_MACRO(v) \
\
v.Ds = _IQmpy(v.Alpha,v.Cosine) + _IQmpy(v.Beta,v.Sine); \
v.Qs = _IQmpy(v.Beta,v.Cosine) - _IQmpy(v.Alpha,v.Sine);

#endif // __PARK_H__

what i understood from the code is - if i give alpha,beta and theta as inputs it will return me d and q variables.

Pls tell me how should i give values to alpha,beta and theta through the c file i'm working on.

i tried this:

v.Alpha=3;

v.beta=2;

v.theta=2;

but it is showing the following error:

identifier "v" is undefined v.Alpha=3; ^

Pls help me in accessing the variables in park.h file from the main.c file

regards,

Mahesh