f280xpwmdac.h

DSP280X芯片的编程简单例子

/* ==================================================================================
File name:        F280XPWMDAC.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 F280XPWMDAC.C.

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

#ifndef __F280X_PWMDAC_H__
#define __F280X_PWMDAC_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-down mode
prescaler 1.
----------------------------------------------------------------------------*/
#define PWMDAC_INIT_STATE ( FREE_RUN_FLAG +         \
                            PRDLD_IMMEDIATE  +       \
                            TIMER_CNT_UPDN +         \
                            HSPCLKDIV_PRESCALE_X_1 + \
                            CLKDIV_PRESCALE_X_1  +   \
                            PHSDIR_CNT_UP    +       \
                            CNTLD_DISABLE )

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

/*----------------------------------------------------------------------------
Initialization constant for the F280X Action Qualifier Output A Register. 
----------------------------------------------------------------------------*/
#define PWMDAC_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 PWMDAC and sets up dead band values.
----------------------------------------------------------------------------*/
#define PWMDAC_DBCTL_INIT_STATE  ( BP_ENABLE + POLSEL_ACTIVE_HI_CMP )

#define PWMDAC_DBCNT_INIT_STATE   20   // 20 counts = 0.2 usec (delay) * 100 count/usec (for TBCLK = SYSCLK/1)

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

/*----------------------------------------------------------------------------
Initialization constant for the F280X Trip Zone Select Register 
----------------------------------------------------------------------------*/
#define  PWMDAC_TZSEL_INIT_STATE  DISABLE_TZSEL
              
/*----------------------------------------------------------------------------
Initialization constant for the F280X Trip Zone Control Register 
----------------------------------------------------------------------------*/
#define  PWMDAC_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 PWMDAC Driver Object 
-----------------------------------------------------------------------------*/
typedef struct {   
  	int16 *PwmDacInPointer0;   	// Input: Pointer to source data output on PWMDAC channel 0 
	int16 *PwmDacInPointer1;    // Input: Pointer to source data output on PWMDAC channel 1 
	int16 *PwmDacInPointer2;    // Input: Pointer to source data output on PWMDAC channel 2 
	Uint16 PeriodMax;     		// Parameter: PWMDAC half period in number of clocks  (Q0) 
    void (*init)();     	    // Pointer to the init function 
   	void (*update)();   	    // Pointer to the update function 
 	} PWMDAC ;          

/*-----------------------------------------------------------------------------
Define a PWMDAC_handle
-----------------------------------------------------------------------------*/
typedef PWMDAC *PWMDAC_handle;

/*------------------------------------------------------------------------------
Default Initializers for the F280X PWMGEN Object 
------------------------------------------------------------------------------*/
#define F280X_PWMDAC_DEFAULTS   { (int16 *)0x300, \
                                  (int16 *)0x300, \
                                  (int16 *)0x300, \
                                  500,         \
                                  (void (*)(Uint32))F280X_PWMDAC_Init,  \
                                  (void (*)(Uint32))F280X_PWMDAC_Update \
                                 }

#define PWMDAC_DEFAULTS     F280X_PWMDAC_DEFAULTS
/*------------------------------------------------------------------------------
 Prototypes for the functions in F280XPWMDAC.C
------------------------------------------------------------------------------*/
void F280X_PWMDAC_Init(PWMDAC_handle);
void F280X_PWMDAC_Update(PWMDAC_handle);

#endif  // __F280X_PWMDAC_H__