speed_pr.h

TI公司28XDSP控制永磁同步电机(PMSM)

/* =================================================================================
File name:        SPEED_PR.H  (IQ version)                 
                    
Originator:	Digital Control Systems Group
			Texas Instruments

Description: 
    Header file containing the data types, constants for the period based
    speed measurement function. Also contains the prototypes for the 
    functions implemented in SPEED_PR.C
=====================================================================================
 History:
-------------------------------------------------------------------------------------
 04-15-2005	Version 3.20                                                 
------------------------------------------------------------------------------*/
#ifndef __SPEED_PR_H__
#define __SPEED_PR_H__

typedef struct {
       Uint32 NewTimeStamp;  	// Variable : New 'Timestamp' corresponding to a capture event (Q0) - independently with global Q 
       Uint32 OldTimeStamp;  	// Variable : Old 'Timestamp' corresponding to a capture event (Q0) - independently with global Q 
       Uint32 TimeStamp; 	   	// Input : Current 'Timestamp' corresponding to a capture event (Q0) - independently with global Q 
       Uint32 SpeedScaler;    	// Parameter :  Scaler converting 1/N cycles to a GLOBAL_Q speed (Q0) - independently with global Q
       int32 EventPeriod;    	// Input/Variable :  Event Period (Q0) - independently with global Q
       int16 InputSelect;       // Input : Input selection between TimeStamp (InputSelect=0) and EventPeriod (InputSelect=1)
       _iq Speed;             	// Output :  speed in per-unit
       Uint32 BaseRpm;         	// Parameter : Scaler converting GLOBAL_Q speed to rpm (Q0) speed - independently with global Q
       int32 SpeedRpm;        	// Output : speed in r.p.m. (Q0) - independently with global Q
       void (*calc)();     	   	// Pointer to the calulation function 
       } SPEED_MEAS_CAP;       	// Data type created

/* 
Note that 
         SpeedScaler = 60*f/rmp_max 
where f = CLK_freq/(128*N), N = number of teeth in sprocket
and 128 is pre-determined prescaler of timer 2 (used by capture)
*/

typedef SPEED_MEAS_CAP *SPEED_MEAS_CAP_handle;
/*-----------------------------------------------------------------------------
Default initalizer for the SPEED_MEAS_CAP object.
-----------------------------------------------------------------------------*/                     
// SpeedScaler = 260 based on f(clk) 25 MHz, f(samping)= 16.67, 25 kHz
// rmp_max = 1800 rpm

#define SPEED_MEAS_CAP_DEFAULTS   { 0, \
                                    0, \
                                    0, \
                                   260, \
                                    0, \
                                    0, \
                                    0, \
                                   1800, \
                                    0, \
                                  (void (*)(Uint32))speed_prd_calc }

/*------------------------------------------------------------------------------
Prototypes for the functions in SPEED_PR.C
------------------------------------------------------------------------------*/
void speed_prd_calc(SPEED_MEAS_CAP_handle); 

#endif // __SPEED_PR_H__