Infinite loop occurs in app_timer

[Sawada]

app_timer.c

static void timer_list_insert(timer_node_t * p_timer)
{
  if (mp_timer_id_head == NULL)
  {
    mp_timer_id_head = p_timer;
  }
  else
  {
    if (p_timer->ticks_to_expire <= mp_timer_id_head->ticks_to_expire)
    {
     mp_timer_id_head->ticks_to_expire -= p_timer->ticks_to_expire;

      p_timer->next = mp_timer_id_head;
      mp_timer_id_head = p_timer;
    }
    else
    {
      timer_node_t * p_previous;
      timer_node_t * p_current;
      uint32_t ticks_to_expire;

      ticks_to_expire = p_timer->ticks_to_expire;
      p_previous = mp_timer_id_head;
      p_current = mp_timer_id_head;

******

      while ((p_current != NULL) && (ticks_to_expire > p_current->ticks_to_expire))
      {
        ticks_to_expire -= p_current->ticks_to_expire;
        p_previous = p_current;
        p_current = p_current->next;
      }

*******

When the timer is start and stop many times in a short period, an infinite loop occurs in this While().

Is there anything you can think of as a cause?

[mrono]

This sounds similar to the case I encountered: app_timer-hangs

Basically calling app_timer_start() on a timer that is already started might cause it to hang.

[Edvin]

Hello,

Can you check the return codes of your app_timer functions? Do they all return NRF_SUCCESS ( == 0) ?