MultiTimer

uint32_t PlatformTicksGetFunc(void)
{
    /* Platform implementation */
}

MultiTimerInstall(PlatformTicksGetFunc);

MultiTimer timer1;

int MultiTimerStart(&timer1, uint32_t timing, MultiTimerCallback_t callback, void* userData);

int main(int argc, char *argv[])
{
    ...
    while (1) {
        ...
        MultiTimerYield();
    }
}

#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include "MultiTimer.h"

MultiTimer timer1;
MultiTimer timer2;
MultiTimer timer3;

uint32_t PlatformTicksGetFunc(void)
{
    struct timespec current_time;
    clock_gettime(CLOCK_MONOTONIC, &current_time);
    return (uint32_t)((current_time.tv_sec * 1000) + (current_time.tv_nsec / 1000000));
}

void exampleTimer1Callback(MultiTimer* timer, void *userData)
{
    printf("exampleTimer1Callback-> %s.\r\n", (char*)userData);
    MultiTimerStart(timer, 1000, exampleTimer1Callback, userData);
}

void exampleTimer2Callback(MultiTimer* timer, void *userData)
{
    printf("exampleTimer2Callback-> %s.\r\n", (char*)userData);
}

void exampleTimer3Callback(MultiTimer* timer, void *userData)
{
    printf("exampleTimer3Callback-> %s.\r\n", (char*)userData);
    MultiTimerStart(timer, 4567, exampleTimer3Callback, userData);
}

int main(int argc, char *argv[])
{
    MultiTimerInstall(PlatformTicksGetFunc);

    MultiTimerStart(&timer1, 1000, exampleTimer1Callback, "1000ms CYCLE timer");
    MultiTimerStart(&timer2, 5000, exampleTimer2Callback, "5000ms ONCE timer");
    MultiTimerStart(&timer3, 3456, exampleTimer3Callback, "3456ms delay start, 4567ms CYCLE timer");

    while (1) {
        MultiTimerYield();
    }
}