dsp281x_bldcpwm.h

程序是我用DSP2812开发的无刷直流电机控制程序

/* ==================================================================================
File name:        DSP281x_BLDCPWM.H                     
                    
Originator:	Digital Control Systems Group
			Texas Instruments
Description:  
Header file containing data type and object definitions and 
initializers. Also contains prototypes for the functions in DSP281x_BLDCPWM.C.

Target: TMS320F281x family

=====================================================================================
 History:
-------------------------------------------------------------------------------------
 04-15-2005	Version 3.20: Using DSP281x v. 1.00 or higher 
---------------------------------------------------------------------------------- */

#ifndef __DSP281X_BLDCPWM_H__
#define __DSP281X_BLDCPWM_H__

#include "DSP281x_BMSK.h"

/*----------------------------------------------------------------------------
Initialization constant for the F281X Timer TxCON for PWM Generation. 
Sets up the timer to soft stop emulation suspend, continuous up mode
prescaler 1, timer enabled, compare enable.
----------------------------------------------------------------------------*/
#define BLDCPWM_INIT_STATE  (SOFT_STOP_FLAG + 			\
                             TIMER_CONT_UP + 			\
                             TIMER_CLK_PRESCALE_X_1 + 	\
                             TIMER_ENABLE + 			\
                             TIMER_ENABLE_COMPARE)

/*-----------------------------------------------------------------------------
Define the structure of the PWM Driver Object 
-----------------------------------------------------------------------------*/

typedef struct {  
     	Uint16 CmtnPointer;    	// Input: Commutation (or switching) state pointer input (Q0)
   		int16 MfuncPeriod;      // Input: Duty ratio of the PWM outputs (Q15) 
   		Uint16 PeriodMax;    	// Parameter: Maximum period (Q0)
   		int16 DutyFunc;   	    // Input: PWM period modulation input (Q15)
   		Uint16 PwmActive;     	// Parameter: 0 = PWM active low, 1 = PWM active high (0 or 1)
   		void (*init)();   	    // Pointer to the init function 
   		void (*update)();     	// Pointer to the update function
       } PWMGEN;

/*
The "PwmActive" setting depends on Power devices. 
when PwmActive = 1 (active high) implies the power device turns ON with a HIGH gate signal. 
     PwmActive = 0 (active low) implies the power device turns ON with a LOW gate signal. 

This polarity definition is not the same as the PWM polarity(Active High/Active Low) 
defined by the ACTRA register in x281x. The setting chosen here is applicable only 
when ACTRA is configured to generate Active High PWM. 
*/

/*-----------------------------------------------------------------------------
Define a PWMGEN_handle
-----------------------------------------------------------------------------*/
typedef PWMGEN *PWMGEN_handle;

/*------------------------------------------------------------------------------
Default Initializers for the F281X PWMGEN Object 
------------------------------------------------------------------------------*/
#define F281X_EV1_BLDC_PWM_GEN {0x0000, \
                                0x7FFF, \
                                0x1D4C, \
                                0x0000, \
                                0x0001, \
                             (void (*)(Uint32))F281X_EV1_BLDC_PWM_Init,  \
                             (void (*)(Uint32))F281X_EV1_BLDC_PWM_Update \
                             }

#define F281X_EV2_BLDC_PWM_GEN {0x0000, \
                                0x7FFF, \
                                0x1D4C, \
                                0x0000, \
                                0x0001, \
                             (void (*)(Uint32))F281X_EV2_BLDC_PWM_Init,  \
                             (void (*)(Uint32))F281X_EV2_BLDC_PWM_Update \
                             }

#define PWMGEN_DEFAULTS 	F281X_EV1_BLDC_PWM_GEN
/*------------------------------------------------------------------------------
 Prototypes for the functions in DSP281X_BLDCPWM.C
------------------------------------------------------------------------------*/
void F281X_EV1_BLDC_PWM_Init(PWMGEN_handle);
void F281X_EV1_BLDC_PWM_Update(PWMGEN_handle);

#endif  // __DSP281X_BLDCPWM_H__