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📄 ucos-ii的移植代码 for 8051.txt

📁 uCOS-II的移植代码 for 8051
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电子牛:我自己最近作的:uCOS-II的移植代码 for 8051 [绝对原著]!!!
[日期:2005-5-17] 来源:21icbbs 作者:电子牛 [字体:大 中 小] 


 


移植说明:

我没有移植uCOS前,再网上下了一些案例可是大部分都不能直接运行,而且有好多还都有错误。

还发现很多"移植者"是忠实的操洗者,并且还操错了。这个移植代码是我领会不少代码的长短根据自己的经验编制,绝对原著!!!因为有好多与大多数移植代码不同之处,故帖出来共享,希望能对将要移植uCOS的人以启发和帮助。

由于我个人时间不多,所以没有写什么移植的"前因后果"

但:
移植的详细细节在程序中的注释部分已经非常详尽了,这里就不多说了。
如果那位大虾,能更有好的建议,请跟我联系,不胜感激!

也可以跟我索要全部移植代码,我将给你一个keil工程,你只需电击一下编译按扭,在软件仿真运行即可在串口1窗口里看到uCOS-II的风采!(不需任何编程,当然除了你以后要添加应用任务)

注意不要将本移植代码应用于商业!!!

如果那位大虾,能更有好的建议,请跟我联系,不胜感激!

我的联系方式:

QQ:  75011221    呢称:电子牛
EMAIL:  niuyimail@126.com


OS_CPU_C.C

/*
********************************************************************************
*************************
*                    INITIALIZE A TASK'S STACK
*
* Description: This function is called by either OSTaskCreate() or 
OSTaskCreateExt() to initialize the
*       stack frame of the task being created. This function is highly 
processor specific.
*
* Arguments : task     is a pointer to the task code
*
*       os_pdata     is a pointer to a user supplied data area that 
will be passed to the task
*              when the task first executes.
*
*       ptos     is a pointer to the top of stack. It is assumed 
that 'ptos' points to
*              a 'free' entry on the task stack. If 
OS_STK_GROWTH is set to 1 then 
*              'ptos' will contain the HIGHEST valid address of 
the stack. Similarly, if
*              OS_STK_GROWTH is set to 0, the 'ptos' will 
contains the LOWEST valid address
*              of the stack.
*
*       opt      specifies options that can be used to alter the 
behavior of OSTaskStkInit().
*              (see uCOS_II.H for OS_TASK_OPT_???).
*
* Returns  : Always returns the location of the new top-of-stack' once the 
processor registers have
*       been placed on the stack in the proper order.
*
* Note(s)  : Interrupts are enabled when your task starts executing. You can 
change this by setting the
*       PSW to 0x0002 instead. In this case, interrupts would be 
disabled upon task startup. The
*       application code would be responsible for enabling interrupts at 
the beginning of the task
*       code. You will need to modify OSTaskIdle() and OSTaskStat() so 
that they enable 
*       interrupts. Failure to do this will make your system crash!
********************************************************************************
*************************
*/
/*
at89c55wd PDL(sp form LOW to HIGH):    (堆栈指针所指的栈顶数据为有效数
据)
              装入堆栈指
针ptos到stk
          
        stk-->    入栈:task底\高  
          (高内存)
        入  ||    入栈:ACC
        栈  ||    入栈:B
        顺  ||    入栈:DPH  
  //暂时忽略第二指针
        序  ||     入栈:DPL
         | \/  |   入栈:PSW
         |    |   入栈:R7-
R4
         |______|  入栈:os_pdata(R3,R2,R1)用寄存
器传递os_pdata
              入栈:R0  
            (底内存)

      //        入栈:
DPS??    //双数据指针选择寄存器??
      //        入栈:PC
自己应该参照编译器定义入栈/出栈顺序,写出来备以后查阅
*/
OS_STK *OSTaskStkInit (void (*task)(void *pd)LG_REENTRANT, void *os_pdata, 
OS_STK *ptos, INT16U opt) LG_REENTRANT
{
  //INT16U *stk;
  OS_STK  *stk;

  opt  = opt;              /* 'opt' is not used, prevent 
warning           */
  stk  = (OS_STK *)ptos;        /* Load stack 
pointer                   */
                
      //装入堆栈指针ptos到stk

  *stk = 0;              
  //入栈:R0
  stk        -= sizeof(void *);
  *(void **)stk  = (void *)os_pdata;    //用寄存器传递
os_pdata
  *--stk = 4;            
    //入栈:R4-R7
  *--stk = 5;
  *--stk = 6;
  *--stk = 7;            
    

  *--stk = PSW;            
  //入栈:PSW
  *--stk = 'L';            
  //入栈:DPL
  *--stk = 'H';            
  //入栈:DPH    //暂时忽略第二指针
  *--stk = 'B';            
  //入栈:B
  *--stk = 'A';            
  //入栈:ACC

  *--stk  = ((INT16U)task & 0xff00) >> 8;  //保存任务地址
  *--stk  = (INT16U)task & 0x00ff;

  *--stk = 15;            
  //入栈个数
                
      //END
  return ((OS_STK *)stk);
}

/*$PAGE*/
/*
********************************************************************************
*************************
*            INITIALIZE A TASK'S STACK FOR FLOATING POINT EMULATION
*
********************************************************************************
*************************
*/

/*$PAGE*/
//void OSTaskStkInit_FPE_x86 (OS_STK **pptos, OS_STK **ppbos, INT32U *psize)
//{
//}

/*$PAGE*/
/*
********************************************************************************
*************************
*                      TASK SWITCH HOOK
*
* Description: This function is called when a task switch is performed. This 
allows you to perform other
*       operations during a context switch.
*
* Arguments : none
*
* Note(s)  : 1) Interrupts are disabled during this call.
*       2) It is assumed that the global pointer 'OSTCBHighRdy' points 
to the TCB of the task that
*         will be 'switched in' (i.e. the highest priority task) 
and, 'OSTCBCur' points to the 
*         task being switched out (i.e. the preempted task).
********************************************************************************
*************************
*/
#if OS_CPU_HOOKS_EN > 0 
void OSTaskSwHook (void) LG_REENTRANT
{
}
#endif

/*
********************************************************************************
*************************
*                      OSTCBInit() HOOK
*
* Description: This function is called by OS_TCBInit() after setting up most of 
the TCB.
*
* Arguments : ptcb  is a pointer to the TCB of the task being created.
*
* Note(s)  : 1) Interrupts may or may not be ENABLED during this call.
********************************************************************************
*************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void OSTCBInitHook (OS_TCB *ptcb) LG_REENTRANT
{
  ptcb = ptcb;                      /* Prevent Compiler 
warning         */
}
#endif


/*
********************************************************************************
*************************
*                        TICK HOOK
*
* Description: This function is called every tick.
*
* Arguments : none
*
* Note(s)  : 1) Interrupts may or may not be ENABLED during this call.
********************************************************************************
*************************
*/
#if OS_CPU_HOOKS_EN > 0 
void OSTimeTickHook (void) LG_REENTRANT
{
}
#endif


/*
********************************************************************************
*************************
*                
        中断服务程序外挂
*    NOTE : 注意:所有中断外挂都在临界区之外,用户可以自行控制进/退
临界区
********************************************************************************
*************************
*/
#if OS_ISR_T1_EN > 0
void  OSISR_T1HOOK (void) LG_REENTRANT
{

    /* 请在这里输入中断服务程序      
  */

}
#endif

#if OS_ISR_INT0_EN > 0
void  OSISR_INT0HOOK (void) LG_REENTRANT
{

    /* 请在这里输入中断服务程序      
  */

}
#endif

#if OS_ISR_INT1_EN > 0
void  OSISR_INT1HOOK (void) LG_REENTRANT
{

    /* 请在这里输入中断服务程序      
  */

}
#endif

#if OS_ISR_S0_EN > 0
void  OSISR_S0HOOK (void) LG_REENTRANT
{

    /* 请在这里输入中断服务程序      
  */

    

}
#endif

----------------

[dvnews_page=OS_CPU_A.ASM之的中断管理部分]


;*******************************************************************************
*************************
;                        uC/OS-II
;                     The Real-Time Kernel
;
;             (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
;                     All Rights Reserved
;
;
;                    at89c55wd Specific code
;                     LARGE MEMORY MODEL
;
;                      keil C/C++ V7.2
;                    (at89c55wd Compatible Target)
;
; File     : OS_CPU_A.ASM
; By      : Jean J. Labrosse
; Port by   : 牛毅  2005-04-25->2005-04-28  
  QQ:75011221  niuyimail@126.com
;    修补 : 2005-05-02-01:30 (增加了中断管理和临界区宏)
;    修补 : 2005-05-16-13:00 (修补_CopySPtoC_XBP的漏洞, 有标记
处%%%%????%%%%%%)
;*******************************************************************************
*************************
#include  "OS_CFG.H"

      NAME  OS_CPU_A

;*******************************************************************************
*************************
;                   要使用的外部函数和公共数据
;*******************************************************************************
*************************
      EXTRN CODE (_?OSIntExit)
      EXTRN CODE (_?OSTimeTick)
      EXTRN CODE (_?OSTaskSwHook)

IF  OS_ISR_T1_EN <> 0
    EXTRN CODE  (_?OSISR_T1HOOK)
ENDIF
IF  OS_ISR_INT0_EN <> 0
    EXTRN CODE  (_?OSISR_INT0HOOK)
ENDIF
IF  OS_ISR_INT1_EN <> 0
    EXTRN CODE  (_?OSISR_INT1HOOK)
ENDIF
IF  OS_ISR_S0_EN <> 0
    EXTRN CODE  (_?OSISR_S0HOOK)
ENDIF

    EXTRN DATA  (?C_XBP)
;DT?C_XBP  SEGMENT  DATA
;    RSEG  DT?C_XBP
;?C_XBP:
;C_XBP:
;  DS  1
    ?STACK  SEGMENT IDATA
    RSEG  ?STACK

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