example_freqcal.h

DSP学习板上的例子程序包括 AD转换 CAN总线 SPI SCI

// TI File $Revision: /main/1 $
// Checkin $Date: December 1, 2004   11:30:48 $
//###########################################################################
//
// FILE:	Example_freqcal.h
//
// TITLE:	Frequency measurement using EQEP peripheral
//
// DESCRIPTION:
//
// Header file containing data type and object definitions and 
// initializers. 
//
//###########################################################################
// Original Author: SD
//
// $TI Release: DSP280x, DSP2801x Header Files V1.41 $
// $Release Date: August 7th, 2006 $
//###########################################################################

#ifndef __FREQCAL__
#define __FREQCAL__

#include "IQmathLib.h"         // Include header for IQmath library
/*-----------------------------------------------------------------------------
Define the structure of the FREQCAL Object 
-----------------------------------------------------------------------------*/
typedef struct {
                Uint32 freqScaler_pr;   // Parameter : Scaler converting 1/N cycles to a GLOBAL_Q freq (Q0) - independently with global Q
                Uint32 freqScaler_fr;   // Parameter : Scaler converting 1/N cycles to a GLOBAL_Q freq (Q0) - independently with global Q
                Uint32 BaseFreq;        // Parameter : Maximum Freq
                _iq freq_pr;            // Output :  Freq in per-unit using capture unit
				int32 freqhz_pr;        // Output: Freq in Hz, measured using Capture unit       
                Uint32 oldpos;
                _iq freq_fr;            // Output : Freq in per-unit using position counter                    
                int32 freqhz_fr; 	    // Output: Freq in Hz, measured using Capture unit 
                void (*init)();     	// Pointer to the init funcion          
                void (*calc)();    		// Pointer to the calc funtion        
                }  FREQCAL;

/*-----------------------------------------------------------------------------
Define a QEP_handle
-----------------------------------------------------------------------------*/
typedef FREQCAL *FREQCAL_handle;

/*-----------------------------------------------------------------------------
Default initializer for the FREQCAL Object.
-----------------------------------------------------------------------------*/

#define FREQCAL_DEFAULTS {\
		313,200,10000,0,0,\
		0,0,0,\
		(void (*)(long))FREQCAL_Init,\
        (void (*)(long))FREQCAL_Calc }

/*-----------------------------------------------------------------------------
Prototypes for the functions in F28XQEP.C                                 
-----------------------------------------------------------------------------*/
void FREQCAL_Init(void);                                              
void FREQCAL_Calc(FREQCAL_handle);
                
#endif /*  __FREQCAL__ */