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OSA : OS_Bsem_Wait_TO

OS_Bsem_Wait_TO (bsem, timeout)

Allowed only in taskSwitches contextUses timer

Wait for binary semaphore. If timeout expires before semaphore set, then stop waiting with Timeout flag set (see OS_IsTimeout)

Call allowed:

Only in task


bsem Binary semaphore's ID. Number of binary semaphores is set by OS_BSEMS constant in OSAcfg.h
timeout Time of waiting in system ticks - calling OS_Timer periods


timeout If timeout expired then system service OS_IsTimeout will return true


void Task (void)
    for (;;) {
        OS_Bsem_Wait_TO(5, 20);  // 20 ticks wait for binary semaphore #5
        if (!OS_IsTimeout()) {

Old style name


See also

en/osa/ref/allservices/os_bsem_wait_to.txt · Last modified: 07.10.2010 13:56 (external edit)
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