finished state machine

due_obd2/statemachine.h

@@ -1,11 +1,17 @@
 #ifndef STATEMACHINE_H
 #define STATEMACHINE_H
 #ifdef __cplusplus
- extern "C" {
+extern "C"
+{
 #endif
 
 #include "Arduino.h"
 
+#define STATE_INIT 0
+#define STATE_CAR_INFO 1
+
+#define STATE_AMOUNT 2 /* change when more states are added */
+
 /* two displays:
     - initialisation display, shows the state of booting up
     - main display, shows the data from the OBD2 scanner
@@ -16,44 +22,39 @@
 
 /**
  * @brief      State struct. Contains the id of the state, and the functions that are called when the state is entered, running and exited.
-*/
+ */
 typedef struct SM_STATE
 {
     int id;
+    int next;
     void (*on_enter)();
     void (*on_run)();
     void (*on_exit)();
 } state_t;
 
-/**
- * @brief      Transition struct. Contains the id of the state it transitions to, and the next state.
-*/
-typedef struct SM_TRANSITION
-{
-    int state_id;
-    state_t *next_state;
-} transition_t;
-
-/**
- * @brief      State machine struct. Contains the current state and the transitions.
-*/
-typedef struct SM_STATE_MACHINE
-{
-    state_t *current_state;
-    transition_t *transitions; /* Transitions between states. Every state's ID is also it's position in the array.*/
-
-} statemachine_t;
-
 /**
  * @brief      Initialises the state machine. Initializes the statemachine struct.
  */
-void statemachine_init();
-void __state_none() 
-{
-    /* do nothing*/
-}
+__UINT8_TYPE__ statemachine_init();
+/**
+ * @brief      Main loop of the state machine. executes the on_run function of the current state.
+ */
+void statemachine_loop();
+
+/**
+ * @brief      Changes the state of the state machine to the next state. Calls the exit function of the current state and the enter function of the next state.
+ */
+void statemachine_next();
+
+/**
+ * @brief      Registers a state in the state machine.
+ * @param      state  The state to add
+ * @param      index  The index of the state in the array. Must be the same as the id of the state.
+ * @return     1 if the state was added successfully, 0 if not.
+ */
+__UINT8_TYPE__ statemachine_register_state(state_t *state, int index);
 
 #ifdef __cplusplus
- }
- #endif
+}
+#endif
 #endif // !STATEMACHINE_H