pwm.h

非常实用的AD和pwm的ad公司21990dsp芯片的控制源代码

/***************************************************************************************
*                                                                                      *
* Library: Configuration of PWM block in single update mode                            *
*                                                                                      *
* File: pwm.h                                                                       *
*                                                                                      *
* Description: pwm21990 include file                                                     *
* Purpose    : Declare library routines PWM block operation             *
*                                                                                      *
* Author     : JC                                                                      *
* Version    : 1.0                                                                     *
* Date       : Dec 2001                                                            *
* Modification History:    None                                                        *
*                                                                                      *
* Embedded Control Systems                                                             *
* Analog Devices Inc.                                                                  *
***************************************************************************************/

/***************************************************************************************
*                                                                                      *
* Constants that need to be defined in main.h:                                         *
*                                                                                      *
* #define  Cry_clock        	= xxxx;		Crystal clock frequency [kHz]          *
* #define PLL_clock_Multiplier  = xxxx;		Multiplier for core clock
* #define H_clock_ratio		= xxxx;		core/H clock ratio
* #define PWM_dreq				= xxxx;  	[Hz]
* #define  PWM_deadtime     = xxxx;			Desired deadtime [nsec]                *
* #define  PWM_syncpulse    = xxxx;			Desired sync pulse time [nsec]         *
***************************************************************************************/

/***************************************************************************************
*                                                                                      *
* Other Libraries Required by this code:                                             *
*                                                                                      *
* None                                                                                 *
***************************************************************************************/

#ifndef PWM_INCLUDED
#define PWM_INCLUDED

/***************************************************************************************
* Routines Defined  in this code                                                     *
***************************************************************************************/
.extern PWM_Init_;

/***************************************************************************************
* Global Variables Defined                                               *
***************************************************************************************/

/* None */

/***************************************************************************************
*                                                                                      *
* Type:  Macro                                                                        *
*                                                                                      *
* Call: PWM_Init(PWMSYNC_ISR, PWMTRIP_ISR);                                            *
*                                                                                      *
* Initialises the PWM block of the adsp-21990 with the parameters set in main.h           *
* All outputs are enabled, no crossover and no chopping. Also setup PWM interrupts.    *
*                                                                                      *
* Inputs  :   	PWMSYNC_ISR: Label of PWM_SYNC interrupt service routine                        *
* 				PWMTRIP_ISR: Label of PWM_TRIP interrupt service routine                        *
*                                                                                      *
* Ouputs  :	None                                                                   *
*                                                                                      *
* Modified:	AR, AY0				                                          *
*                                                                                      *
***************************************************************************************/
#define PWM_Init(PWMTRIP_int_label, PWMSYNC_int_label) \
		Set_InterruptVector(INT0_ADDR, PWMTRIP_int_label); /* Vector for PWM_TRIP int*/ \
		Set_InterruptVector(INT1_ADDR, PWMSYNC_int_label); /* Vector for PWM_SYNC int */ \
		iopg = IntCtrl_Page;\
		ar = IO(IPR2);\
		ay0 = 0xff00;\
		ar = ar and ay0;\
		ay0= 0x0001;			/* assign PWM_TRIP ISR to USR0 and PWM_SYNC ISR to USR1*/\
		ar = ar or ay0;\
		IO(IPR2) = ar;\
		call PWM_Init_         /*Initialize PWM registers*/
		
	
		
		
#endif