os_cpu_c.c

stm32+ucos-ii

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                         The Real-Time Kernel
*
*
*                                (c) Copyright 2006, Micrium, Weston, FL
*                                          All Rights Reserved
*
*                                           ARM Cortex-M3 Port
*
* File      : OS_CPU_C.C
* Version   : V2.89
* By        : Jean J. Labrosse
*             Brian Nagel
*
* For       : ARMv7M Cortex-M3
* Mode      : Thumb2
* Toolchain : IAR EWARM
*********************************************************************************************************
*/

#define  OS_CPU_GLOBALS
#include <ucos_ii.h>

/*
*********************************************************************************************************
*                                          LOCAL VARIABLES
*********************************************************************************************************
*/

#if OS_TMR_EN > 0u
static  INT16U  OSTmrCtr;
#endif

/*
*********************************************************************************************************
*                                          SYS TICK DEFINES
*********************************************************************************************************
*/

#define  OS_CPU_CM3_NVIC_ST_CTRL    (*((volatile INT32U *)0xE000E010uL)) /* SysTick Ctrl & Status Reg. */
#define  OS_CPU_CM3_NVIC_ST_RELOAD  (*((volatile INT32U *)0xE000E014uL)) /* SysTick Reload  Value Reg. */
#define  OS_CPU_CM3_NVIC_ST_CURRENT (*((volatile INT32U *)0xE000E018uL)) /* SysTick Current Value Reg. */
#define  OS_CPU_CM3_NVIC_ST_CAL     (*((volatile INT32U *)0xE000E01CuL)) /* SysTick Cal     Value Reg. */
#define  OS_CPU_CM3_NVIC_PRIO_ST    (*((volatile INT8U  *)0xE000ED23uL)) /* SysTick Handler Prio  Reg. */

#define  OS_CPU_CM3_NVIC_ST_CTRL_COUNT                    0x00010000uL   /* Count flag.                */
#define  OS_CPU_CM3_NVIC_ST_CTRL_CLK_SRC                  0x00000004uL   /* Clock Source.              */
#define  OS_CPU_CM3_NVIC_ST_CTRL_INTEN                    0x00000002uL   /* Interrupt enable.          */
#define  OS_CPU_CM3_NVIC_ST_CTRL_ENABLE                   0x00000001uL   /* Counter mode.              */
#define  OS_CPU_CM3_NVIC_PRIO_MIN                               0xFFu    /* Min handler prio.          */

/*
*********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*                                            (BEGINNING)
*
* Description: This function is called by OSInit() at the beginning of OSInit().
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void  OSInitHookBegin (void)
{
    INT32U   size;
    OS_STK  *pstk;

                                                           /* Clear exception stack for stack checking.*/
    pstk = &OS_CPU_ExceptStk[0];
    size = OS_CPU_EXCEPT_STK_SIZE;
    while (size > 0u) {
        size--;
       *pstk++ = (OS_STK)0;
    }

    OS_CPU_ExceptStkBase = &OS_CPU_ExceptStk[OS_CPU_EXCEPT_STK_SIZE - 1u];

#if OS_TMR_EN > 0u
    OSTmrCtr = 0u;
#endif
}
#endif

/*
*********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*                                               (END)
*
* Description: This function is called by OSInit() at the end of OSInit().
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void  OSInitHookEnd (void)
{
}
#endif

/*
*********************************************************************************************************
*                                          TASK CREATION HOOK
*
* Description: This function is called when a task is created.
*
* Arguments  : ptcb   is a pointer to the task control block of the task being created.
*
* Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void  OSTaskCreateHook (OS_TCB *ptcb)
{
#if OS_APP_HOOKS_EN > 0u
    App_TaskCreateHook(ptcb);
#else
    (void)ptcb;                                  /* Prevent compiler warning                           */
#endif
}
#endif


/*
*********************************************************************************************************
*                                           TASK DELETION HOOK
*
* Description: This function is called when a task is deleted.
*
* Arguments  : ptcb   is a pointer to the task control block of the task being deleted.
*
* Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void  OSTaskDelHook (OS_TCB *ptcb)
{
#if OS_APP_HOOKS_EN > 0u
    App_TaskDelHook(ptcb);
#else
    (void)ptcb;                                  /* Prevent compiler warning                           */
#endif
}
#endif

/*
*********************************************************************************************************
*                                             IDLE TASK HOOK
*
* Description: This function is called by the idle task.  This hook has been added to allow you to do
*              such things as STOP the CPU to conserve power.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts are enabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void  OSTaskIdleHook (void)
{
#if OS_APP_HOOKS_EN > 0u
    App_TaskIdleHook();
#endif
}
#endif

/*
*********************************************************************************************************
*                                            TASK RETURN HOOK
*
* Description: This function is called if a task accidentally returns.  In other words, a task should
*              either be an infinite loop or delete itself when done.
*
* Arguments  : ptcb      is a pointer to the task control block of the task that is returning.
*
* Note(s)    : none
*********************************************************************************************************
*/

#if OS_CPU_HOOKS_EN > 0u
void  OSTaskReturnHook (OS_TCB  *ptcb)
{
#if OS_APP_HOOKS_EN > 0u
    App_TaskReturnHook(ptcb);
#else
    (void)ptcb;
#endif
}
#endif

/*
*********************************************************************************************************
*                                           STATISTIC TASK HOOK
*
* Description: This function is called every second by uC/OS-II's statistics task.  This allows your