nested_ints_defs.h

Freescale HCS12 系列嵌套中断源码

/******************************************************************************
*                                                   COPYRIGHT (c) MOTOROLA 2003
* FILE NAME: nested_ints_defs.h
*
* PURPOSE: Nested interrupts library C file
*
*******************************************************************************
*******************************************************************************
**  THIS CODE IS ONLY INTENDED AS AN EXAMPLE FOR THE METROWERKS COMPILER AND **
**      THE HCS122 EVB AND HAS ONLY BEEN GIVEN A MIMIMUM LEVEL OF TEST.      **
**  IT IS PROVIDED 'AS SEEN' WITH NO GUARANTEES AND NO PROMISE OF SUPPORT.   **
*******************************************************************************
*******************************************************************************
*
* DOCUMENTATION SOURCE: EKB Applications
*
* TARGET DEVICE: MC9S12DP256
*
* COMPILER: Metrowerks                     VERSION: HC12_V2.0
*
* DESCRIPTION: Library file for nested interrupts on HCS12
*
* AUTHOR: Daniel Malik  LOCATION: EKB      LAST EDIT DATE: 29/09/03
*
* UPDATE HISTORY
* REV      AUTHOR      DATE         DESCRIPTION OF CHANGE
* ---      ------      ---------    ---------------------
* 1.0      D.Malik     29/09/03     file generation
*
******************************************************************************/
/*===========================================================================*/
/* Motorola reserves the right to make changes without further notice to any */
/* product herein to improve reliability, function, or design. Motorola does */
/* not assume any  liability arising  out  of the  application or use of any */
/* product,  circuit, or software described herein;  neither  does it convey */
/* any license under its patent rights  nor the  rights of others.  Motorola */
/* products are not designed, intended,  or authorized for use as components */
/* in  systems  intended  for  surgical  implant  into  the  body, or  other */
/* applications intended to support life, or  for any  other application  in */
/* which the failure of the Motorola product  could create a situation where */
/* personal injury or death may occur. Should Buyer purchase or use Motorola */
/* products for any such intended  or unauthorized  application, Buyer shall */
/* indemnify and  hold  Motorola  and its officers, employees, subsidiaries, */
/* affiliates,  and distributors harmless against all claims costs, damages, */
/* and expenses, and reasonable  attorney  fees arising  out of, directly or */
/* indirectly,  any claim of personal injury  or death  associated with such */
/* unintended or unauthorized use, even if such claim alleges that  Motorola */
/* was negligent regarding the  design  or manufacture of the part. Motorola */
/* and the Motorola logo* are registered trademarks of Motorola Ltd.         */
/*****************************************************************************/
/* provide definitions of the interrupt enable and disable functions:        */
/*                                                                           */
/* Interrupt definitions have form: INTnum_level ENABLE,DISABLE              */
/* Where num & level are numbers and ENABLE & DISABLE are names of           */
/* macros or functions                                                       */
/*                                                                           */
/* Example: INT0_1	int0ena,int0dis                                          */
/*                                                                           */
/* - this defines interrupt number 0                                         */
/* - the interrupt service routine is defined to have interrupt nesting      */
/*   level of 1                                                              */
/* - the interrupt source is disabled by macro/function int0dis & enabled by */
/*   macro/function int0ena (macros/prototypes should be provided)           */
/*                                                                           */
/* Note: the interrupt number serves just for enumeration, it has no link to */
/*       hardware interrupt number                                           */
/*     : For clarity & readability it is however advisable to define         */
/*       interrupts to have numbers which correspond with their hardware     */
/*       numbers                                                             */
/*                                                                           */
/* provide definition of ENABLE_INTERRUPTS() macro/function                  */
/*****************************************************************************/

#define ENABLE_INTERRUPTS()	asm(CLI)

#define INT8E()		Timer.tie.bit.c0i = 1	/* enable low priority interrupt */
#define INT8D()		Timer.tie.bit.c0i = 0	/* disable low priority interrupt */
#define INT9E()		Timer.tie.bit.c1i = 1	/* enable medium priority interrupt */
#define INT9D()		Timer.tie.bit.c1i = 0	/* disable medium priority interrupt */
#define INT10E()	Timer.tie.bit.c2i = 1	/* enable high priority interrupt */
#define INT10D()	Timer.tie.bit.c2i = 0	/* disable high priority interrupt */

#define INT8_1	INT8E,INT8D	    /* define interrupt #8 as level 1 priority, assign enable/disable macros */
#define INT9_2	INT9E,INT9D	    /* define interrupt #9 as level 2 priority, assign enable/disable macros */
#define INT10_3	INT10E,INT10D   /* define interrupt #10 as level 3 priority, assign enable/disable macros */