state machine handling added

source/application/include/collision_ctrl.h

@@ -10,5 +10,6 @@
 
 int collision_ctrl_init(void);
 int collision_ctrl_get_distance_mm(void);
+bool collision_ctrl_is_collision(void);
 
 #endif /* SOURCE_APPLICATION_INCLUDE_COLLISION_CTRL_H_ */

source/application/include/system_state.h

@@ -0,0 +1,26 @@
+/*
+ * system_state.h
+ *
+ *  Created on: Sep 19, 2016
+ *      Author: tkl
+ */
+
+#ifndef SOURCE_APPLICATION_INCLUDE_SYSTEM_STATE_H_
+#define SOURCE_APPLICATION_INCLUDE_SYSTEM_STATE_H_
+
+enum system_state {
+	SYS_INIT = 0,
+	SYS_IDLE,
+	SYS_DRIVING,
+	SYS_COLLISION_DETECTED,
+	SYS_COLLISION_DRIVE_BACK,
+	SYS_COLLISION_TURN,
+	SYS_MAX
+};
+
+int system_state_init(void);
+int system_state_poll(void);
+int system_state_force(enum system_state state);
+
+
+#endif /* SOURCE_APPLICATION_INCLUDE_SYSTEM_STATE_H_ */