Bundled components with hardware operations can be ignored during compile

src/Atm_analog.cpp

@@ -1,3 +1,5 @@
+#ifndef ATM_DISABLE_ANALOG
+
 #include "Atm_analog.hpp"
 
 Atm_analog& Atm_analog::begin( int attached_pin, int samplerate /* = 50 */ ) {
@@ -106,3 +108,4 @@ Atm_analog& Atm_analog::trace( Stream& stream ) {
 
   return *this;
 }
+#endif // ATM_DISABLE_ANALOG

src/Atm_analog.hpp

@@ -1,5 +1,5 @@
 #pragma once
-
+#ifndef ATM_DISABLE_ANALOG
 #include <Automaton.h>
 
 class Atm_analog : public Machine {
@@ -35,3 +35,4 @@ class Atm_analog : public Machine {
   int event( int id );
   void action( int id );
 };
+#endif // ATM_DISABLE_ANALOG

src/Atm_comparator.cpp

@@ -1,3 +1,4 @@
+#ifndef ATM_DISABLE_COMPARATOR
 #include "Atm_comparator.hpp"
 
 Atm_comparator& Atm_comparator::begin( int attached_pin, int samplerate /* = 50 */ ) {
@@ -171,3 +172,4 @@ Atm_comparator& Atm_comparator::trace( Stream& stream ) {
             "IDLE\0SAMPLE\0SEND" );
   return *this;
 }
+#endif //ATM_DISABLE_COMPARATOR

src/Atm_comparator.hpp

@@ -1,5 +1,5 @@
 #pragma once
-
+#ifndef ATM_DISABLE_COMPARATOR
 #include <Automaton.h>
 
 class Atm_comparator : public Machine {
@@ -41,3 +41,4 @@ class Atm_comparator : public Machine {
   int event( int id );
   void action( int id );
 };
+#endif //ATM_DISABLE_COMPARATOR

src/Atm_fade.cpp

@@ -1,3 +1,4 @@
+#ifndef ATM_DISABLE_FADE
 #include "Atm_fade.hpp"
 
 Atm_fade& Atm_fade::begin( int attached_pin ) {
@@ -150,3 +151,4 @@ Atm_fade& Atm_fade::trace( Stream& stream ) {
             "IDLE\0ON\0START\0STARTU\0UP\0STARTD\0DOWN\0REPEAT\0DONE\0OSTARTU\0OUP\0OSTARTD\0ODOWN" );
   return *this;
 }
+#endif // ATM_DISABLE_FADE

src/Atm_fade.hpp

@@ -1,5 +1,5 @@
 #pragma once
-
+#ifndef ATM_DISABLE_FADE
 #include <Automaton.h>
 
 class Atm_fade : public Machine {
@@ -37,3 +37,4 @@ class Atm_fade : public Machine {
   int event( int id );
   void action( int id );
 };
+#endif //ATM_DISABLE_FADE

src/Atm_led.cpp

@@ -1,3 +1,4 @@
+#ifndef ATM_DISABLE_LED
 #include "Atm_led.hpp"
 
 Atm_led& Atm_led::begin( int attached_pin, bool activeLow ) {
@@ -239,3 +240,4 @@ Atm_led& Atm_led::trace( Stream& stream ) {
             "IDLE\0ON\0START\0BLINK_OFF\0LOOP\0DONE\0OFF\0WT_ON\0WT_START" );
   return *this;
 }
+#endif //ATM_DISABLE_LED

src/Atm_led.hpp

@@ -1,5 +1,5 @@
 #pragma once
-
+#ifndef ATM_DISABLE_LED
 #include <Automaton.h>
 
 class Atm_led : public Machine {
@@ -54,3 +54,4 @@ class Atm_led : public Machine {
   int event( int id );
   void action( int id );
 };
+#endif //ATM_DISABLE_LED

src/Atm_player.cpp

@@ -1,3 +1,4 @@
+#ifndef ATM_DISABLE_PLAYER
 #include "Atm_player.hpp"
 
 /* Add optional parameters for the state machine to begin()
@@ -240,3 +241,4 @@ Atm_player& Atm_player::trace( Stream& stream ) {
                      "PLAYER\0EVT_START\0EVT_STOP\0EVT_TOGGLE\0EVT_TIMER\0EVT_EOPAT\0EVT_REPEAT\0ELSE\0IDLE\0START\0SOUND\0QUIET\0NEXT\0REPEAT\0FINISH" );
   return *this;
 }
+#endif // ATM_DISABLE_PLAYER

src/Atm_player.hpp

@@ -1,5 +1,5 @@
 #pragma once
-
+#ifndef ATM_DISABLE_PLAYER
 #include <Automaton.h>
 
 #if defined( _VARIANT_ARDUINO_DUE_X ) || defined( ARDUINO_FEATHER52 ) 
@@ -49,7 +49,7 @@ class Atm_player : public Machine {
   int event( int id );
   void action( int id );
 };
-
+#endif //ATM_DISABLE_PLAYER
 /*
 Automaton::ATML::begin - Automaton Markup Language
 

src/Machine.cpp

@@ -39,7 +39,7 @@ Machine& Machine::state( int state ) {
  *
  */
 
-Machine& Machine::trigger( int evt /* = 0 */ ) {
+Machine& Machine::trigger( int evt /* = 0 */, const std::function<void(Machine&)>& transition /* = {} */ ) {
   int new_state;
   int max_cycle = 8;
   do {
@@ -48,6 +48,8 @@ Machine& Machine::trigger( int evt /* = 0 */ ) {
     new_state = read_state( state_table + ( current * state_width ) + evt + ATM_ON_EXIT + 1 );
   } while ( --max_cycle && ( new_state == -1 || next_trigger != -1 ) );
   if ( new_state > -1 ) {
+    // Event triggers transition. Call transition callback to make some state change.
+    if (transition) transition(*this);
     next_trigger = evt;
     flags &= ~ATM_SLEEP_FLAG;
     cycle();  // Pick up the trigger

src/Machine.hpp

@@ -4,11 +4,11 @@
 */
 
 #pragma once
-
+#include <functional>
 class Machine {
  public:
   virtual int state( void );
-  virtual Machine& trigger( int evt = 0 );
+  virtual Machine& trigger( int evt = 0, const std::function<void(Machine&)>& transition = {} );
   Machine& cycle( uint32_t time = 0 );
   uint32_t state_millis;
   uint8_t flags = ATM_SLEEP_FLAG;