INT8U          OSTCBX;             /* Bit position in group  corresponding to task priority (0..7) */
    INT8U          OSTCBY;             /* Index into ready table corresponding to task priority        */
    INT8U          OSTCBBitX;          /* Bit mask to access bit position in ready table               */
    INT8U          OSTCBBitY;          /* Bit mask to access bit position in ready group               */
    
#if OS_TASK_DEL_EN    
    BOOLEAN        OSTCBDelReq;        /* Indicates whether a task needs to delete itself              */
#endif
} OS_TCB;

/*$PAGE*/
/*
*********************************************************************************************************
*                                            GLOBAL VARIABLES
*********************************************************************************************************
*/
                                       
OS_EXT  INT32U       OSCtxSwCtr;               /* Counter of number of context switches                */

#if     (OS_MAX_EVENTS >= 2)
OS_EXT  OS_EVENT    *OSEventFreeList;          /* Pointer to list of free EVENT control blocks         */
OS_EXT  OS_EVENT     OSEventTbl[OS_MAX_EVENTS];/* Table of EVENT control blocks                        */
#endif

OS_EXT  INT32U       OSIdleCtr;                /* Idle counter                                         */

#if     OS_TASK_STAT_EN
OS_EXT  INT8S        OSCPUUsage;               /* Percentage of CPU used                               */
OS_EXT  INT32U       OSIdleCtrMax;             /* Maximum value that idle counter can take in 1 sec.   */
OS_EXT  INT32U       OSIdleCtrRun;             /* Value reached by idle counter at run time in 1 sec.  */
OS_EXT  BOOLEAN      OSStatRdy;                /* Flag indicating that the statistic task is ready     */
#endif

OS_EXT  INT8U  data  OSIntNesting;             /* Interrupt nesting level                              */

OS_EXT  INT8U        OSLockNesting;            /* Multitasking lock nesting level                      */

OS_EXT  INT8U   idata     OSPrioCur;                /* Priority of current task                             */
OS_EXT  INT8U   idata     OSPrioHighRdy;            /* Priority of highest priority task                    */

OS_EXT  INT8U        OSRdyGrp;                        /* Ready list group                              */
OS_EXT  INT8U        OSRdyTbl[OS_RDY_TBL_SIZE];       /* Table of tasks which are ready to run         */

OS_EXT  BOOLEAN  idata   OSRunning;                       /* Flag indicating that kernel is running        */

#if     OS_TASK_CREATE_EN  || OS_TASK_CREATE_EXT_EN || OS_TASK_DEL_EN
OS_EXT  INT8U        OSTaskCtr;                       /* Number of tasks created                       */
#endif

OS_EXT  OS_TCB  * idata OSTCBCur;                        /* Pointer to currently running TCB              */
OS_EXT  OS_TCB  * idata OSTCBHighRdy;                    /* Pointer to highest priority TCB ready to run  */

OS_EXT  OS_TCB      *OSTCBFreeList;                   /* Pointer to list of free TCBs                  */
OS_EXT  OS_TCB      *OSTCBList;                       /* Pointer to doubly linked list of TCBs         */
OS_EXT  OS_TCB      *OSTCBPrioTbl[OS_LOWEST_PRIO + 1];/* Table of pointers to created TCBs             */

OS_EXT  INT32U       OSTime;                   /* Current value of system time (in ticks)              */


extern  INT8U const code OSMapTbl[];               /* Priority->Bit Mask lookup table                      */
extern  INT8U const code OSUnMapTbl[];             /* Priority->Index    lookup table                      */

/*$PAGE*/
/*
*********************************************************************************************************
*                                          FUNCTION PROTOTYPES
*                                     (Target Independant Functions)
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                        MESSAGE MAILBOX MANAGEMENT
*********************************************************************************************************
*/
#if         OS_MBOX_EN
void       *OSMboxAccept(OS_EVENT *pevent)reentrant;
OS_EVENT   *OSMboxCreate(void *msg)reentrant;
void       *OSMboxPend(OS_EVENT *pevent, INT16U timeout, INT8U *err)reentrant;
INT8U       OSMboxPost(OS_EVENT *pevent, void *msg)reentrant;
INT8U       OSMboxQuery(OS_EVENT *pevent, OS_MBOX_DATA *dataptr)reentrant;
#endif
/*
*********************************************************************************************************
*                                           MEMORY MANAGEMENT
*********************************************************************************************************
*/
#if         OS_MEM_EN && (OS_MAX_MEM_PART >= 2)
OS_MEM     *OSMemCreate(void *addr, INT32U nblks, INT32U blksize, INT8U *err)reentrant;
void       *OSMemGet(OS_MEM *pmem, INT8U *err)reentrant;
INT8U       OSMemPut(OS_MEM *pmem, void *pblk)reentrant;
INT8U       OSMemQuery(OS_MEM *pmem, OS_MEM_DATA *dataptr)reentrant;
#endif
/*
*********************************************************************************************************
*                                         MESSAGE QUEUE MANAGEMENT
*********************************************************************************************************
*/
#if         OS_Q_EN && (OS_MAX_QS >= 2)
void       *OSQAccept(OS_EVENT *pevent)reentrant;
OS_EVENT   *OSQCreate(void **start, INT16U size)reentrant;
INT8U       OSQFlush(OS_EVENT *pevent)reentrant;
void       *OSQPend(OS_EVENT *pevent, INT16U timeout, INT8U *err)reentrant;
INT8U       OSQPost(OS_EVENT *pevent, void *msg)reentrant;
INT8U       OSQPostFront(OS_EVENT *pevent, void *msg)reentrant;
INT8U       OSQQuery(OS_EVENT *pevent, OS_Q_DATA *dataptr)reentrant;
#endif
/*$PAGE*/
/*
*********************************************************************************************************
*                                          SEMAPHORE MANAGEMENT
*********************************************************************************************************
*/
#if         OS_Sem_EN
INT16U      OSSemAccept(OS_EVENT *pevent)reentrant;
OS_EVENT   *OSSemCreate(INT16U value)reentrant;
void        OSSemPend(OS_EVENT *pevent, INT16U timeout, INT8U *err)reentrant;
INT8U       OSSemPost(OS_EVENT *pevent)reentrant;
INT8U       OSSemQuery(OS_EVENT *pevent, OS_SEM_DATA *dataptr)reentrant;
#endif
/*
*********************************************************************************************************
*                                            TASK MANAGEMENT
*********************************************************************************************************
*/
#if         OS_TASK_CHANGE_PRIO_EN
INT8U       OSTaskChangePrio(INT8U oldprio, INT8U newprio)reentrant;
#endif

INT8U       OSTaskCreate(void (*task)(void *pd)reentrant, void *dataptr, OS_STK *ptos, INT8U prio)reentrant;

#if         OS_TASK_CREATE_EXT_EN
INT8U       OSTaskCreateExt(void  (*task)(void *pd)reentrant, 
                            void   *dataptr, 
                            OS_STK *ptos, 
                            INT8U   prio,
                            INT16U  id,
                            OS_STK *pbos,
                            INT32U  stk_size,
                            void   *pext,
                            INT16U  opt)reentrant;
#endif                            

#if         OS_TASK_DEL_EN
INT8U       OSTaskDel(INT8U prio)reentrant;
INT8U       OSTaskDelReq(INT8U prio)reentrant;
#endif

#if         OS_TASK_SUSPEND_EN
INT8U       OSTaskResume(INT8U prio)reentrant;
INT8U       OSTaskSuspend(INT8U prio)reentrant;
#endif

#if         OS_TASK_CREATE_EXT_EN
INT8U       OSTaskStkChk(INT8U prio, OS_STK_DATA *dataptr)reentrant;
#endif

INT8U       OSTaskQuery(INT8U prio, OS_TCB *dataptr)reentrant;

/*
*********************************************************************************************************
*                                            TIME MANAGEMENT
*********************************************************************************************************
*/
void        OSTimeDly(INT16U ticks)reentrant;
INT8U       OSTimeDlyHMSM(INT8U hours, INT8U minutes, INT8U seconds, INT16U milli)reentrant;
INT8U       OSTimeDlyResume(INT8U prio)reentrant;
INT32U      OSTimeGet(void)reentrant;
void        OSTimeSet(INT32U ticks)reentrant;
void        OSTimeTick(void);

/*
*********************************************************************************************************
*                                             MISCELLANEOUS
*********************************************************************************************************
*/

void        OSInit(void);

void        OSIntEnter(void);
void        OSIntExit(void);

void        OSSchedLock(void)reentrant;
void        OSSchedUnlock(void)reentrant;

void        OSStart(void);

void        OSStatInit(void)reentrant;

INT16U      OSVersion(void)reentrant;

/*$PAGE*/
/*
*********************************************************************************************************
*                                      INTERNAL FUNCTION PROTOTYPES
*                            (Your application MUST NOT call these functions)
*********************************************************************************************************
*/

#if         OS_MBOX_EN || OS_Q_EN || OS_Sem_EN
void        OSEventTaskRdy(OS_EVENT *pevent, void *msg, INT8U msk)reentrant;
void        OSEventTaskWait(OS_EVENT *pevent)reentrant;
void        OSEventTO(OS_EVENT *pevent)reentrant;
void        OSEventWaitListInit(OS_EVENT *pevent)reentrant;
#endif

#if         OS_MEM_EN && (OS_MAX_MEM_PART >= 2)
void        OSMemInit(void)reentrant;
#endif

#if         OS_Q_EN
void        OSQInit(void)reentrant;
#endif

void        OSSched(void)reentrant;

void        OSTaskIdle(void *dataptr)reentrant;

#if         OS_TASK_STAT_EN
void        OSTaskStat(void *dataptr)reentrant;
#endif

INT8U       OSTCBInit(INT8U prio, OS_STK *ptos, OS_STK *pbos, INT16U id, INT16U stk_size, void *pext, INT16U opt)reentrant;


OS_STK      *OSTaskStkInit(	void  (*task)(void *pd)reentrant,
				void   *dataptr, 
				OS_STK *ptos, 
				INT16U opt    )reentrant;
//-----------------------------------------------------------------------
void        OSCtxSw(void);
void        OSIntCtxSw(void);
void        OSStartHighRdy(void);
//-----------------------------------------------------------------------
void        OSTickISRHook(void);
void        OSTCBSWHook(void);
void        OSTaskSwHook(void);
void        TimeTickConfig(void); //* initial timetick 
//-----------------------------------------------------------------------
void        OSTaskCreateHook(OS_TCB *ptcb)reentrant;
void        OSTaskDelHook(OS_TCB *ptcb)reentrant;
void        OSTaskStatHook(void)reentrant;
void        OSTimeTickHook(void)reentrant;
//-----------------------------------------------------------------------
void        ExternInt0(void);
void        ExternInt1(void);
void        Time1Int(void);
void        SeryInt(void);
//-----------------------------------------------------------------------
extern  INT8U     data   TickTimeInit;
extern  INT8U     data   STKStart;
OS_EXT  OS_STK    data   User_SP[2];