do-while macro expansion error APP_SCHED_INIT

[morerook]

In following this example: https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/scheduler-tutorial

once I added

APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);

The following error results:

3> Compiling ‘main.c’
3> In file included from D:\Current Work\BLE\nRF5_SDK_15.2.0_9412b96\examples\peripheral\nrf5-scheduler-tutorial\main.c:52:
3> ../../../../../../components/libraries/scheduler/app_scheduler.h:118:5: error: expected identifier or '(' before 'do'
3> D:\Current Work\BLE\nRF5_SDK_15.2.0_9412b96\examples\peripheral\nrf5-scheduler-tutorial\main.c:58:1: note: in expansion of macro 'APP_SCHED_INIT'
3> ../../../../../../components/libraries/scheduler/app_scheduler.h:124:7: error: expected identifier or '(' before 'while'
3> D:\Current Work\BLE\nRF5_SDK_15.2.0_9412b96\examples\peripheral\nrf5-scheduler-tutorial\main.c:58:1: note: in expansion of macro 'APP_SCHED_INIT'
Build failed

I followed the tutorial, but I can't seem to get rid of this error.

[Einar Thorsrud]

Hi,

Based on the error it seems like you put the call to APP_SCHED_INIT() outside a function. The tutorial states you should write the line with the call to APP_SCHED_INIT() "above your main loop", which is not to be confused with above your main function. To be clear, your main function should look like the following after that step:

int main(void)
{
    lfclk_request();
    log_init();
    gpio_init();
    timer_init();

    NRF_LOG_INFO("Scheduler tutorial example started.");

    APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);

    // Enter main loop.
    while (true)
    {
        __WFI();
    }
}

[morerook]

You are absolutely right!

But I am wondering, just for my own knowledge, how you managed to catch that just from the error code I provided?

[Einar Thorsrud]

Hi,

I can really say. It was just a gut feeling, and when I tested it seemed to be correct.