예제 #1
0
파일: os_tmr.c 프로젝트: Akagi201/uCOS-II
OS_TMR  *OSTmrCreate (INT32U           dly,
                      INT32U           period,
                      INT8U            opt,
                      OS_TMR_CALLBACK  callback,
                      void            *callback_arg,
                      INT8U           *pname,
                      INT8U           *perr)
{
    OS_TMR   *ptmr;


#ifdef OS_SAFETY_CRITICAL
    if (perr == (INT8U *)0) {
        OS_SAFETY_CRITICAL_EXCEPTION();
    }
#endif

#ifdef OS_SAFETY_CRITICAL_IEC61508
    if (OSSafetyCriticalStartFlag == OS_TRUE) {
        OS_SAFETY_CRITICAL_EXCEPTION();
    }
#endif

#if OS_ARG_CHK_EN > 0u
    switch (opt) {                                          /* Validate arguments                                     */
        case OS_TMR_OPT_PERIODIC:
             if (period == 0u) {
                 *perr = OS_ERR_TMR_INVALID_PERIOD;
                 return ((OS_TMR *)0);
             }
             break;

        case OS_TMR_OPT_ONE_SHOT:
             if (dly == 0u) {
                 *perr = OS_ERR_TMR_INVALID_DLY;
                 return ((OS_TMR *)0);
             }
             break;

        default:
             *perr = OS_ERR_TMR_INVALID_OPT;
             return ((OS_TMR *)0);
    }
#endif
    if (OSIntNesting > 0u) {                                /* See if trying to call from an ISR                      */
        *perr  = OS_ERR_TMR_ISR;
        return ((OS_TMR *)0);
    }
    OSSchedLock();
    ptmr = OSTmr_Alloc();                                   /* Obtain a timer from the free pool                      */
    if (ptmr == (OS_TMR *)0) {
        OSSchedUnlock();
        *perr = OS_ERR_TMR_NON_AVAIL;
        return ((OS_TMR *)0);
    }
    ptmr->OSTmrState       = OS_TMR_STATE_STOPPED;          /* Indicate that timer is not running yet                 */
    ptmr->OSTmrDly         = dly;
    ptmr->OSTmrPeriod      = period;
    ptmr->OSTmrOpt         = opt;
    ptmr->OSTmrCallback    = callback;
    ptmr->OSTmrCallbackArg = callback_arg;
#if OS_TMR_CFG_NAME_EN > 0u
    ptmr->OSTmrName        = pname;
#endif
    OSSchedUnlock();
    *perr = OS_ERR_NONE;
    return (ptmr);
}
예제 #2
0
OS_TMR  *OSTmrCreate (INT32U           dly,
                      INT32U           period,
                      INT8U            opt,
                      OS_TMR_CALLBACK  callback,
                      void            *callback_arg,
                      INT8U           *pname,
                      INT8U           *perr)
{
    OS_TMR   *ptmr;
#if OS_TMR_CFG_NAME_SIZE > 0
    INT8U     len;
#endif


#if OS_ARG_CHK_EN > 0
    if (perr == (INT8U *)0) {                               /* Validate arguments                                     */
        return ((OS_TMR *)0);
    }
    switch (opt) {
        case OS_TMR_OPT_PERIODIC:
             if (period == 0) {
                 *perr = OS_ERR_TMR_INVALID_PERIOD;
                 return ((OS_TMR *)0);
             }
             break;

        case OS_TMR_OPT_ONE_SHOT:
             if (dly == 0) {
                 *perr = OS_ERR_TMR_INVALID_DLY;
                 return ((OS_TMR *)0);
             }
             break;

        default:
             *perr = OS_ERR_TMR_INVALID_OPT;
             return ((OS_TMR *)0);
    }
#endif
    if (OSIntNesting > 0) {                                 /* See if trying to call from an ISR                      */
        *perr  = OS_ERR_TMR_ISR;
        return ((OS_TMR *)0);
    }
    OSTmr_Lock();
    ptmr = OSTmr_Alloc();                                   /* Obtain a timer from the free pool                      */
    if (ptmr == (OS_TMR *)0) {
        OSTmr_Unlock();
        *perr = OS_ERR_TMR_NON_AVAIL;
        return ((OS_TMR *)0);
    }
    ptmr->OSTmrState       = OS_TMR_STATE_STOPPED;          /* Indicate that timer is not running yet                 */
    ptmr->OSTmrDly         = dly;
    ptmr->OSTmrPeriod      = period;
    ptmr->OSTmrOpt         = opt;
    ptmr->OSTmrCallback    = callback;
    ptmr->OSTmrCallbackArg = callback_arg;
#if OS_TMR_CFG_NAME_SIZE > 0
    if (pname !=(INT8U *)0) {
        len = OS_StrLen(pname);                             /* Copy timer name                                        */
        if (len < OS_TMR_CFG_NAME_SIZE) {
            (void)OS_StrCopy(ptmr->OSTmrName, pname);
        } else {
#if OS_TMR_CFG_NAME_SIZE > 1
            ptmr->OSTmrName[0] = '#';                       /* Invalid size specified                                 */
            ptmr->OSTmrName[1] = OS_ASCII_NUL;
#endif
            *perr              = OS_ERR_TMR_NAME_TOO_LONG;
            OSTmr_Unlock();
            return (ptmr);
        }
    }
#endif
    OSTmr_Unlock();
    *perr = OS_ERR_NONE;
    return (ptmr);
}
예제 #3
0
OS_TMR  *OSTmrCreate (INT32U           dly,
                      INT32U           period,
                      INT8U            opt,
                      OS_TMR_CALLBACK  callback,
                      void            *callback_arg,
                      INT8U           *pname,
                      INT8U           *perr)
{
    OS_TMR   *ptmr;


#ifdef OS_SAFETY_CRITICAL
    if (perr == (INT8U *)0) {
        OS_SAFETY_CRITICAL_EXCEPTION();
        return ((OS_TMR *)0);
    }
#endif

#ifdef OS_SAFETY_CRITICAL_IEC61508
    if (OSSafetyCriticalStartFlag == OS_TRUE) {
        OS_SAFETY_CRITICAL_EXCEPTION();
        return ((OS_TMR *)0);
    }
#endif

#if OS_ARG_CHK_EN > 0u
	/* 检查参数 */
    switch (opt) {                                          /* Validate arguments                                     */
		/* 周期定时器的period不能是0 */
        case OS_TMR_OPT_PERIODIC:
             if (period == 0u) {
                 *perr = OS_ERR_TMR_INVALID_PERIOD;
                 return ((OS_TMR *)0);
             }
             break;
		/* 单次定时器的dly不能是0 */
        case OS_TMR_OPT_ONE_SHOT:
             if (dly == 0u) {
                 *perr = OS_ERR_TMR_INVALID_DLY;
                 return ((OS_TMR *)0);
             }
             break;

        default:
             *perr = OS_ERR_TMR_INVALID_OPT;
             return ((OS_TMR *)0);
    }
#endif
    if (OSIntNesting > 0u) {                                /* See if trying to call from an ISR                      */
        *perr  = OS_ERR_TMR_ISR;
        return ((OS_TMR *)0);
    }
	/* 关调度 */
    OSSchedLock();
	/* 从空闲定时器控制块链表中获得一个空闲定时器控制块 */
    ptmr = OSTmr_Alloc();                                   /* Obtain a timer from the free pool                      */
	/* 如果没有空闲定时器控制块,则返回错误信息 */
    if (ptmr == (OS_TMR *)0) {
        OSSchedUnlock();
        *perr = OS_ERR_TMR_NON_AVAIL;
        return ((OS_TMR *)0);
    }
	/* 设置获取到的定时器控制块 */
	/* 创建定时器后,定时器是停止状态 */
    ptmr->OSTmrState       = OS_TMR_STATE_STOPPED;          /* Indicate that timer is not running yet                 */
	/* 设置第一次延时值 */
    ptmr->OSTmrDly         = dly;
	/* 设置周期值 */
    ptmr->OSTmrPeriod      = period;
	/* 设置定时器类型,单次或者周期 */
    ptmr->OSTmrOpt         = opt;
	/* 设置定时器回调函数 */
    ptmr->OSTmrCallback    = callback;
	/* 设置定时器回调函数的参数 */
    ptmr->OSTmrCallbackArg = callback_arg;
#if OS_TMR_CFG_NAME_EN > 0u
    if (pname == (INT8U *)0) {                              /* Is 'pname' a NULL pointer?                             */
        ptmr->OSTmrName    = (INT8U *)(void *)"?";
    } else {
        ptmr->OSTmrName    = pname;
    }
#endif
	/* 允许调度 */
    OSSchedUnlock();
    *perr = OS_ERR_NONE;
    return (ptmr);
}