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The table below shows the difference in API for semaphore management.

µC/OS-II (os_sem.c)µC/OS-III (os_sem.c)Note
INT16U
OSSemAccept(
    OS_EVENT    *pevent);
 (1)
OS_EVENT *
OSSemCreate(
    INT16U       cnt);
void 
OSSemCreate(
    OS_SEM       *p_sem,
    CPU_CHAR     *p_name,
    OS_SEM_CTR    cnt,
    OS_ERR       *p_err);
(2)
OS_EVENT *
OSSemDel(
    OS_EVENT    *pevent,
    INT8U        opt,
    INT8U       *perr);
OS_OBJ_QTY,
OSSemDel(
    OS_SEM       *p_sem,
    OS_OPT        opt,
    OS_ERR       *p_err);
 
void
OSSemPend(
    OS_EVENT    *pevent,
    INT32U       timeout,
    INT8U       *perr);
OS_SEM_CTR
OSSemPend(
    OS_SEM       *p_sem,
    OS_TICK       timeout,
    OS_OPT        opt, 
    CPU_TS       *p_ts,
    OS_ERR       *p_err);
(3)
INT8U
OSSemPendAbort(
    OS_EVENT    *pevent,
    INT8U        opt,
    INT8U       *perr);
OS_OBJ_QTY
OSSemPendAbort(
    OS_SEM       *p_sem,
    OS_OPT        opt,
    OS_ERR       *p_err);
 
void
OSSemPost(
    OS_EVENT    *pevent);
void 
OSSemPost(
    OS_SEM       *p_sem,
    OS_OPT        opt,
    OS_ERR       *p_err);
 
INT8U
OSSemQuery(
    OS_EVENT    *pevent,
    OS_SEM_DATA *p_sem_data);
 (4)
void
OSSemSet(
    OS_EVENT    *pevent,
    INT16U       cnt,
    INT8U       *perr);
void
OSSemSet(
    OS_SEM       *p_sem,
    OS_SEM_CTR    cnt,
    OS_ERR       *p_err);
 

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