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uCOS-II的移植代码 for 8051 !
作者:电子牛  发布时间:2009/10/16  阅读次数:5691  字体大小: 【】 【】【
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
               ;?STACK:
               Stack:
               DS       40      

                       EXTRN BIT         (OSRunning)
                       EXTRN XDATA (OSIntNesting)
;                       EXTRN XDATA (OSTickDOSCtr)
                       EXTRN XDATA (OSPrioHighRdy)
                       EXTRN XDATA (OSPrioCur)
               EXTRN XDATA (OSTCBCur)              
                       EXTRN XDATA (OSTCBHighRdy)

;*******************************************************************************
*************************
;                                                                                             MACRO DEFINE
;*******************************************************************************
*************************
PUSHALL       MACRO
       ;PUSH       PC      
       PUSH       ACC
       PUSH       B
       PUSH       DPH
       PUSH       DPL
       PUSH       PSW
       IRP       REG,       <R7, R6, R5, R4, R3, R2, R1, R0>
       MOV       A,       REG
       PUSH       ACC
       ENDM
       ENDM

POPALL         MACRO
       IRP       REG,       <R0, R1, R2, R3, R4, R5, R6, R7>
       POP       ACC
       MOV       REG,       A
       ENDM
       POP       PSW
       POP       DPL
       POP       DPH
       POP       B
       POP       ACC
       ;RET/RETI
       ENDM

OS_ENTER_CRITICAL       MACRO
       MOV       B,IE                               ;因为所有程序没有使用
B寄存器,所以使用了B寄存器作为IE暂存
       CLR       EA
       ENDM
OS_EXIT_CRITICAL       MACRO
       MOV       IE,B                               ;因为所有程序没有使用
B寄存器,所以使用了B寄存器作为IE暂存
       ENDM
;*******************************************************************************
*************************
;                                                                                       供外部使用的函数
;*******************************************************************************
*************************
                         PUBLIC       _?OSTickISR
                         PUBLIC         _?OSStartHighRdy
                         PUBLIC         _?OSCtxSw
                         PUBLIC         _?OSIntCtxSw
/*$PAGE*/
;*******************************************************************************
*************************
;                                                                       函数体段
;*******************************************************************************
*************************
;*******************************************************************************
**************************
;                                               用户中断程序区               之       定时器中断
1 OSISR_T1()
;*******************************************************************************
**************************
IF OS_ISR_T1_EN <> 0
               CSEG       AT         001BH               ;设置T0中断向量
               LJMP       _OSISR_T1

       ?PR?_OSISR_T1?OS_CPU_A                         SEGMENT CODE
       RSEG       ?PR?_OSISR_T1?OS_CPU_A
_OSISR_T1:
       OS_ENTER_CRITICAL
       ;(1)保存处理器寄存器   先PUSH到SP在COPY到?C_XBP
       PUSHALL
       LCALL       _CopySPtoC_XBP                       ;COPY SP 的内容到?
C_XBP

       ;(2)记忆中断的嵌套层OSIntNesting++       进入中断
       ;(3) if (OSIntNesting == 1)
       ;       OSTCBCur->OSTCBStkPtr <= ?C_XBP
       LCALL       _Enter_INT
       OS_EXIT_CRITICAL      

       ;(4)调用中断服务外挂
       LCALL       _?OSISR_T1HOOK                       ;在这里进行中断服务

       OS_ENTER_CRITICAL
       ;(5) Call OSTimeTick();
       LCALL       _?OSTimeTick

       ;(6) Call OSIntExit();
       LCALL       _?OSIntExit

       ;(7) 恢复处理器寄存器                       ;没有高优先级任务在就
绪队列中
       ;LCALL       _ComCtxSw2
       LCALL       _CopyC_XBPtoSP
       POPALL
      
       OS_EXIT_CRITICAL
       RETI
ENDIF
;*******************************************************************************
**************************
;                                               用户中断程序区               之       外部中断0
OSISR_INT0()
;*******************************************************************************
**************************
IF OS_ISR_INT0_EN <> 0
               CSEG       AT         0003H               ;设置T0中断向量
               LJMP       _OSISR_INT0

       ?PR?_OSISR_INT0?OS_CPU_A                         SEGMENT CODE
       RSEG       ?PR?_OSISR_INT0?OS_CPU_A
_OSISR_INT0:
       OS_ENTER_CRITICAL
       ;(1)保存处理器寄存器   先PUSH到SP在COPY到?C_XBP
       PUSHALL
       LCALL       _CopySPtoC_XBP                       ;COPY SP 的内容到?
C_XBP

       ;(2)记忆中断的嵌套层OSIntNesting++       进入中断
       ;(3) if (OSIntNesting == 1)
       ;       OSTCBCur->OSTCBStkPtr <= ?C_XBP
       LCALL       _Enter_INT      
       OS_EXIT_CRITICAL
      
       ;(4)调用中断服务外挂
       LCALL       _?OSISR_INT0HOOK                       ;在这里进行中断服务

       OS_ENTER_CRITICAL
       ;(5) Call OSTimeTick();
       LCALL       _?OSTimeTick

       ;(6) Call OSIntExit();
       LCALL       _?OSIntExit

       ;(7) 恢复处理器寄存器               ;没有高优先级任务在就绪队列中
       ;LCALL       _ComCtxSw2
       LCALL       _CopyC_XBPtoSP
       POPALL
       OS_EXIT_CRITICAL
       RETI
ENDIF
;*******************************************************************************
**************************
;                                               用户中断程序区               之       外部中断1
OSISR_INT1()
;*******************************************************************************
**************************
IF OS_ISR_INT1_EN <> 0
               CSEG       AT         0013H               ;设置T0中断向量
               LJMP       _OSISR_INT1

       ?PR?_OSISR_INT1?OS_CPU_A                         SEGMENT CODE
       RSEG       ?PR?_OSISR_INT1?OS_CPU_A
_OSISR_INT1:
       OS_ENTER_CRITICAL
       ;(1)保存处理器寄存器   先PUSH到SP在COPY到?C_XBP
       PUSHALL
       LCALL       _CopySPtoC_XBP                       ;COPY SP 的内容到?
C_XBP

       ;(2)记忆中断的嵌套层OSIntNesting++       进入中断
       ;(3) if (OSIntNesting == 1)
       ;       OSTCBCur->OSTCBStkPtr <= ?C_XBP
       LCALL       _Enter_INT
       OS_EXIT_CRITICAL
      
       ;(4)调用中断服务外挂
       LCALL       _?OSISR_INT1HOOK                       ;在这里进行中断服务

       OS_ENTER_CRITICAL
       ;(5) Call OSTimeTick();
       LCALL       _?OSTimeTick

       ;(6) Call OSIntExit();
       LCALL       _?OSIntExit

       ;(7) 恢复处理器寄存器               ;没有高优先级任务在就绪队列中
       ;LCALL       _ComCtxSw2
       LCALL       _CopyC_XBPtoSP
       POPALL
       OS_EXIT_CRITICAL
       RETI
ENDIF
;*******************************************************************************
**************************
;                                               用户中断程序区               之       串口中断0
OSISR_S0()
;*******************************************************************************
**************************
IF OS_ISR_S0_EN <> 0
               CSEG       AT         0023H               ;设置T0中断向量
               LJMP       _OSISR_S0

       ?PR?_OSISR_S0?OS_CPU_A                         SEGMENT CODE
       RSEG       ?PR?_OSISR_S0?OS_CPU_A
_OSISR_S0:
       OS_ENTER_CRITICAL
       ;(1)保存处理器寄存器   先PUSH到SP在COPY到?C_XBP
       PUSHALL
       LCALL       _CopySPtoC_XBP                       ;COPY SP 的内容到?
C_XBP

       ;(2)记忆中断的嵌套层OSIntNesting++       进入中断
       ;(3) if (OSIntNesting == 1)
       ;       OSTCBCur->OSTCBStkPtr <= ?C_XBP
       LCALL       _Enter_INT
       OS_EXIT_CRITICAL
      
       ;(4)调用中断服务外挂
       LCALL       _?OSISR_S0HOOK                       ;在这里进行中断服务

       OS_ENTER_CRITICAL
       ;(5) Call OSTimeTick();
       LCALL       _?OSTimeTick

       ;(6) Call OSIntExit();
       LCALL       _?OSIntExit

       ;(7) 恢复处理器寄存器               ;没有高优先级任务在就绪队列中
       ;LCALL       _ComCtxSw2
       LCALL       _CopyC_XBPtoSP
       POPALL

       OS_EXIT_CRITICAL
       RETI
ENDIF
来源:21icbbs
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