os_cpu.h

这个是ucos II 2.52在80系列上应用的部分原代码,已经证实好用

/*
***********************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
*                                          All Rights Reserved
*
*                                     Mitsubishi 7700 Family Specific code
*                                         
*
* File : OS_CPU.H
* By   : Jean J. Labrosse
* Ported by : Zhu Yifan
***********************************************************************************************
*/

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

/*
***********************************************************************************************
*                                              DATA TYPES
*                                         (Compiler Specific)
***********************************************************************************************
*/

typedef unsigned char  BOOLEAN;
typedef unsigned char  INT8U;                    /* Unsigned  8 bit quantity   */
typedef signed   char  INT8S;                    /* Signed    8 bit quantity   */
typedef unsigned int   INT16U;                   /* Unsigned 16 bit quantity   */
typedef signed   int   INT16S;                   /* Signed   16 bit quantity   */
typedef unsigned long  INT32U;                   /* Unsigned 32 bit quantity   */
typedef signed   long  INT32S;                   /* Signed   32 bit quantity   */
typedef float          FP32;                     /* Single precision floating point*/
typedef double         FP64;                     /* Double precision floating point*/

typedef unsigned char  OS_STK;                   /* Each stack entry is 8-bit wide */



/* 
***********************************************************************************************
*				 Mitsubishi 7700 Family
*
* Method #1:  Disable/Enable interrupts using simple instructions.  After critical section, interrupts
*             will be enabled even if they were disabled before entering the critical section.  You MUST
*             change the constant in OS_CPU_A.ASM, function OSIntCtxSw() from 10 to 8.
*
* Method #2:  Disable/Enable interrupts by preserving the state of interrupts.  In other words, if 
*             interrupts were disabled before entering the critical section, they will be disabled when
*             leaving the critical section.  You MUST change the constant in OS_CPU_A.ASM, function 
*             OSIntCtxSw() from 8 to 10.
***********************************************************************************************
*/





/*  if PS is changed between OS_ENTER_CRITICAL() and OS_EXIT_CRITICAL(),Dont't use methord 2 */
#define  OS_CRITICAL_METHOD    1			

#if      OS_CRITICAL_METHOD == 1
#define  OS_ENTER_CRITICAL()  asm("SEI")                /* Disable interrupts */
#define  OS_EXIT_CRITICAL()   asm("CLI")                /* Enable  interrupts */
#endif

#if      OS_CRITICAL_METHOD == 2						
#define  OS_ENTER_CRITICAL()  asm ("PHP");asm("SEI")    /* Disable interrupts */
#define  OS_EXIT_CRITICAL()   asm ("PLP")               /* Enable  interrupts */
#endif




/*
***********************************************************************************************
*                           Mitsubishi 7700 Family  Miscellaneous
***********************************************************************************************
*/

#define  OS_STK_GROWTH        1                         /* Stack grows from HIGH to LOW memory */


#define  OS_TASK_SW()         asm("BRK")		/* mapped to the software interrupt in m37733 */