RtosTimer

Deprecated: The EventQueue has superseded the RtosTimer. The RtosTimer and EventQueue duplicate the functionality of timing events outside of interrupt context; however, the EventQueue has additional features to handle deferring other events to multiple contexts.

RtosTimer class hierarchy

Use the RtosTimer class to create and control timer functions in the system. A timer function is called when a time period expires, so both one-shot and periodic timers are possible. You can start, restart or stop a timer.

The thread osTimerThread handles timers. Callback functions run under the control of this thread and may use underlying RTOS API calls.

RtosTimer class reference

RtosTimer example

Control the timing of four LEDs.

#include "mbed.h"
#include "rtos.h"

DigitalOut LEDs[4] = {
    DigitalOut(LED1), DigitalOut(LED2), DigitalOut(LED3), DigitalOut(LED4)
};

void blink(void const *n) {
    LEDs[(int)n] = !LEDs[(int)n];
}

int main(void) {
    RtosTimer led_1_timer(blink, osTimerPeriodic, (void *)0);
    RtosTimer led_2_timer(blink, osTimerPeriodic, (void *)1);
    RtosTimer led_3_timer(blink, osTimerPeriodic, (void *)2);
    RtosTimer led_4_timer(blink, osTimerPeriodic, (void *)3);
    
    led_1_timer.start(2000);
    led_2_timer.start(1000);
    led_3_timer.start(500);
    led_4_timer.start(250);
    
    Thread::wait(osWaitForever);
}