f281xbdcpwm.h

TI公司28系列DSP控制无刷直流电机

/* ==================================================================================
File name:        F281XBDCPWM.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 F281XBDCPWM.C.


    dc-bus+ ------------------------
                |                  |
               [1]                [3]
                |----(dc-motor)----|
               [2]                [4]
                |                  |
    dc-bus- ------------------------

Target: TMS320F281x family

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

#ifndef __F281X_BDCPWM_H__
#define __F281X_BDCPWM_H__

#include "f281xbmsk.h"

/*----------------------------------------------------------------------------
Initialization constant for the F281X Timer TxCON for PWM Generation. 
Sets up the timer to run free upon emulation suspend, continuous up mode
prescaler 1, timer enabled.
----------------------------------------------------------------------------*/
#define BDCPWM_INIT_STATE  (FREE_RUN_FLAG +         \
                            TIMER_CONT_UP +        \
                            TIMER_CLK_PRESCALE_X_1 + \
                            TIMER_ENABLE_BY_OWN    + \
                            TIMER_ENABLE)

/*-----------------------------------------------------------------------------
Define the structure of the PWM Driver Object 
-----------------------------------------------------------------------------*/
typedef struct {   
     	Uint16 Rotation;       // Input: 0 = PWM1&4 enabled, 1 = PWM2&3 enabled (Q0)
        int16 MfuncPeriod;     // Input: Period scaler (Q15)              
   		int16 DutyFunc;        // Input: PWM period modulation input (Q15)
   		Uint16 PeriodMax;      // Parameter: Maximum period (Q0)
   		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_BDC_PWM_GEN {0,   \
                              0x7FFF, \
                              0x4000, \
                              0x4000, \
                              1, \
                             (void (*)(Uint32))F281X_EV1_BDC_PWM_Init,  \
                             (void (*)(Uint32))F281X_EV1_BDC_PWM_Update \
                             }

#define F281X_EV2_BDC_PWM_GEN {0,   \
                              0x7FFF, \
                              0x4000, \
                              0x4000, \
                              1, \
                             (void (*)(Uint32))F281X_EV2_BDC_PWM_Init,  \
                             (void (*)(Uint32))F281X_EV2_BDC_PWM_Update \
                             }

#define PWMGEN_DEFAULTS 	F281X_EV1_BDC_PWM_GEN
/*------------------------------------------------------------------------------
 Prototypes for the functions in F281XBDCPWM.C
------------------------------------------------------------------------------*/
void F281X_EV1_BDC_PWM_Init(PWMGEN_handle);
void F281X_EV1_BDC_PWM_Update(PWMGEN_handle);

#endif  // __F281X_BDCPWM_H__