RE: issues with app timer module

paul — Thu, 09 May 2019 22:28:01 GMT

Hi Hakon,

One of the issues I have is that I don't want to use the app scheduler for this.

My real issue is that:

1) I can only get the sample timer to run at ms rates if I use the app scheduler

2) the third timer doesn't run at all.

I think that this problem is related to the length of time in the sample handler - ~10-15ms. It is supposed to be called every 20ms and then the third timer every 10ms. The timing budget just doesn't work (15 + 10 > 20). Using the app scheduler just serialises the calls on a first come first served basis and moves the work out of interrupt time/context.

In any case I dropped the use of the sample timer and am progressing.

Cheers Paul

RE: issues with app timer module

Håkon Alseth — Thu, 09 May 2019 07:19:54 GMT

Hi,

Just to make sure you are adjusting the correct queue size (not APP_TIMER_CONFIG_OP_QUEUE_SIZE).

Have you tried upping the scheduler queue size? It's normally set in main:

static void scheduler_init(void)
{
    APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
}

Kind regards,

Håkon