os_cpu.h

强人写的UCOS_II,V2.52

/*
*********************************************************************************************************
*                                                uC/OS-II
*                                          The Real-Time Kernel
*
*                              (c) Copyright 2002, Micrium, Inc., Weston, FL
*                                           All Rights Reserved
*
*                                               TI MSP430 
*
*
* File         : OS_CPU.H
* By           : Alley Zhou([e-mail])
*                Jean J. Labrosse
*********************************************************************************************************
*/

#ifdef  OS_CPU_GLOBALS
#define OS_CPU_EXT
#else
#define OS_CPU_EXT  extern
#endif


typedef unsigned char  BOOLEAN;
typedef unsigned char  INT8U;                    /*   8 bit                    */
typedef signed   char  INT8S;                    /*   8 bit                    */
typedef unsigned int   INT16U;                   /*   16 bit                   */
typedef signed   int   INT16S;                   /*   16 bit                   */
typedef unsigned long  INT32U;                   /*   32 bit                   */
typedef signed   long  INT32S;                   /*   32 bit                   */
typedef float          FP32;                     /*                 */
typedef double         FP64;                     /*                 */

typedef unsigned char   OS_STK;                   /*                */
typedef unsigned char   OS_CPU_SR;                /*                */


#define  OS_CRITICAL_METHOD    3

#if      OS_CRITICAL_METHOD == 1
#define  OS_ENTER_CRITICAL()						 
#define  OS_EXIT_CRITICAL()							 
#endif

#if      OS_CRITICAL_METHOD == 2
#define  OS_ENTER_CRITICAL()                           
#define  OS_EXIT_CRITICAL()                    
#endif

#if      OS_CRITICAL_METHOD == 3
#define  OS_ENTER_CRITICAL()  asm tpa;asm sei;asm staa cpu_sr    /* Disable interrupt */
#define  OS_EXIT_CRITICAL()   asm ldaa cpu_sr;asm tap        /* Enable interrupt                        */
#endif


#define  OS_STK_GROWTH        1              /* top to bottom            */

#define  OS_TASK_SW()         asm swi				  /* software interrupt                */


OS_CPU_EXT  OS_STK  *OSISRStkPtr;                  

#define OS_SAVE_SP(); if(OSIntNesting==1){asm ldx OSTCBCur;asm sts 0,x;}