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OSA : OS_Qtimer_Get

_OST_QTIMER OS_Qtimer_Get (qtimer)

Not allowed in interrupt

Get timer's remaining time. Before calling this service you should do one of these things:

  • disable interrupts
  • enter critical section

Otherwise the timer's value can be changed in the interrupt while reading.

OS_ENABLE_QTIMERS constant must be defined in OSAcfg.h. Size of timers is set by OS_QTIMER_SIZE constant

Call allowed:

Not in interrupt


qtimer Descriptor of timer. Variable of OST_QTIMER type. Contains timer counter, timer state flags and pointer to next timer in list. For PIC16, can only be allocated in bank0 or bank1


_OST_QTIMER integer value of remaining time (in system ticks)


OST_QTIMER qtimer;
void Task (void)
    char itemp;
    for (;;) {
        itemp = OS_DI();
        if (OS_Qtimer_Get(qtimer) < 10)   // Flash green led if less than
            GREEN_LED = 1;                // ten ticks remain

See also

en/osa/ref/allservices/os_qtimer_get.txt · Last modified: 07.10.2010 13:57 (external edit)
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