f280x_stepper_pwm.h

DSP280X芯片的编程简单例子

/* ==================================================================================
File name:        F280X_STEPPER_PWM.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 F280XSTEPPRE_PWM.C.


    dc-bus+ ------------------------
                |                  |
              [1A]                [2A]
                |----(dc-motor)----|
              [1B]                [2B]
                |                  |
    dc-bus- ------------------------

Target: TMS320F280x family
              
=====================================================================================
History:
-------------------------------------------------------------------------------------
 04-15-2005	Version 3.20: Using DSP280x v. 1.10 or higher 
------------------------------------------------------------------------------------*/

#ifndef __F280X_STEPPER_PWM_H__
#define __F280X_STEPPER_PWM_H__

#include "f280xbmsk.h"

/*----------------------------------------------------------------------------
Initialization constant for the F280X Time-Base Control Registers for PWM Generation. 
Sets up the timer to run free upon emulation suspend, count up mode
prescaler 1.
----------------------------------------------------------------------------*/
#define PWM_INIT_STATE ( FREE_RUN_FLAG +         \
                         PHSDIR_CNT_UP    +       \
                         CLKDIV_PRESCALE_X_1  +   \
                         HSPCLKDIV_PRESCALE_X_1 + \
                         PRDLD_IMMEDIATE  +       \
                         TIMER_CNT_UPDN +         \
                         CNTLD_DISABLE )

/*----------------------------------------------------------------------------
Initialization constant for the F280X Compare Control Register. 
----------------------------------------------------------------------------*/
#define CMPCTL_INIT_STATE ( LOADAMODE_ZRO + \
                            LOADBMODE_ZRO + \
                            SHDWAMODE_SHADOW + \
                            SHDWBMODE_SHADOW )

/*----------------------------------------------------------------------------
Initialization constant for the F280X Action Qualifier Output A Register. 
----------------------------------------------------------------------------*/
#define AQCTLA_INIT_STATE ( CAU_SET + CAD_CLEAR )

/*----------------------------------------------------------------------------
Initialization constant for the F280X Dead-Band Generator registers for PWM Generation. 
Sets up the dead band for PWM and sets up dead band values.
----------------------------------------------------------------------------*/
#define DBCTL_INIT_STATE  (BP_ENABLE + POLSEL_ACTIVE_HI_CMP)

#define DBCNT_INIT_STATE   50   // 50 counts = 1 usec (delay) * 100 count/usec (for TBCLK = SYSCLK/1)

/*----------------------------------------------------------------------------
Initialization constant for the F280X PWM Chopper Control register for PWM Generation. 
----------------------------------------------------------------------------*/
#define  PCCTL_INIT_STATE  CHPEN_DISABLE

/*----------------------------------------------------------------------------
Initialization constant for the F280X Trip Zone Select Register 
----------------------------------------------------------------------------*/
#define  TZSEL_INIT_STATE  DISABLE_TZSEL
              
/*----------------------------------------------------------------------------
Initialization constant for the F280X Trip Zone Control Register 
----------------------------------------------------------------------------*/
#define  TZCTL_INIT_STATE ( TZA_HI_Z + TZB_HI_Z + \
                            DCAEVT1_HI_Z + DCAEVT2_HI_Z + \
                            DCBEVT1_HI_Z + DCBEVT2_HI_Z )
                                                                 

/*-----------------------------------------------------------------------------
Define the structure of the PWM Driver Object 
-----------------------------------------------------------------------------*/
typedef struct {   
     	Uint16 RotationA1;       // Input: 0 = PWM1&4 enabled, 1 = PWM2&3 enabled (Q0)
     	Uint16 RotationB1;       // Input: 0 = PWM1&4 enabled, 1 = PWM2&3 enabled (Q0)
     	Uint16 RotationA2;       // Input: 0 = PWM1&4 enabled, 1 = PWM2&3 enabled (Q0)
     	Uint16 RotationB2;       // Input: 0 = PWM1&4 enabled, 1 = PWM2&3 enabled (Q0)
        int16 MfuncPeriod;     // Input: Period scaler (Q15)              
   		int16 DutyFuncA1;        // Input: PWM period modulation input (Q15)
   		int16 DutyFuncB1;        // Input: PWM period modulation input (Q15)
   		int16 DutyFuncA2;        // Input: PWM period modulation input (Q15)
   		int16 DutyFuncB2;        // 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. 
*/

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

/*------------------------------------------------------------------------------
Default Initializers for the F280X PWMGEN Object 
------------------------------------------------------------------------------*/
#define F280X_STEPPRE_PWM_GEN   {0, 0, 0, 0,   \
                              0x7FFF, \
                              0x4000, \
                              0x4000, \
                              0x4000, \
                              0x4000, \
                              1000, \
                              1, \
                             (void (*)(Uint32))F280X_STEPPER_PWM_Init,  \
                             (void (*)(Uint32))F280X_STEPPER_PWM_Update \
                             }


#define PWMGEN_DEFAULTS 	F280X_STEPPRE_PWM_GEN
/*------------------------------------------------------------------------------
 Prototypes for the functions in F280XSTEPPRE_PWM.C
------------------------------------------------------------------------------*/
void F280X_STEPPER_PWM_Init(PWMGEN_handle);
void F280X_STEPPER_PWM_Update(PWMGEN_handle);

#endif  // __F280X_STEPPRE_PWM_H__