fsm.trigger() not working

[stanleyseow]

I wanna trigger a state change every 10 sec but it is not working..

#define WRITE_EVENT 2

while ( millis() - timer1 > 10000 ) {
Serial.print("<<< ");
Serial.print( millis()/divider );
Serial.println(" triggered stateWriteSerial");
fsm.trigger(WRITE_EVENT);
timer1 = millis();
}

setup() {

fsm.add_transition(&stateIdle, &stateWriteSerial, WRITE_EVENT,NULL );

}

[natehouk]

You must call fsm.run_machine() at least once from setup() for fsm.trgger() to work due to the predicate in the trigger function preventing it from triggering if not initialized.

void Fsm::trigger(int event)
{
  if (m_initialized)
  {
    // Find the transition with the current state and given event.
    for (int i = 0; i < m_num_transitions; ++i)
    {
      if (m_transitions[i].state_from == m_current_state &&
          m_transitions[i].event == event)
      {
        Fsm::make_transition(&(m_transitions[i]));
        return;
      }
    }
  }
}

Calling fsm.run_machine() will set m_initialized = true

void Fsm::run_machine()
{
  // first run must exec first state "on_enter"
  if (!m_initialized)
  {
    m_initialized = true;
    if (m_current_state->on_enter != NULL)
      m_current_state->on_enter();
  }
  
  if (m_current_state->on_state != NULL)
    m_current_state->on_state();
    
  Fsm::check_timed_transitions();
}