Add tinyfsm, start converting core functions to an FSM-based event loop

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/tinyfsm/examples/elevator/motor.cpp b/lib/tinyfsm/examples/elevator/motor.cpp
new file mode 100644
index 00000000..b4668070
--- /dev/null
+++ b/lib/tinyfsm/examples/elevator/motor.cpp
@@ -0,0 +1,60 @@
+#include <tinyfsm.hpp>
+#include "motor.hpp"
+#include <iostream>
+
+
+// ----------------------------------------------------------------------------
+// Motor states
+//
+
+class Stopped
+: public Motor
+{
+  void entry() override {
+    std::cout << "Motor: stopped" << std::endl;
+    direction = 0;
+  };
+};
+
+class Up
+: public Motor
+{
+  void entry() override {
+    std::cout << "Motor: moving up" << std::endl;
+    direction = 1;
+  };
+};
+
+class Down
+: public Motor
+{
+  void entry() override {
+    std::cout << "Motor: moving down" << std::endl;
+    direction = -1;
+  };
+};
+
+
+// ----------------------------------------------------------------------------
+// Base State: default implementations
+//
+
+void Motor::react(MotorStop const &) {
+  transit<Stopped>();
+}
+
+void Motor::react(MotorUp const &) {
+  transit<Up>();
+}
+
+void Motor::react(MotorDown const &) {
+  transit<Down>();
+}
+
+int Motor::direction{0};
+
+
+// ----------------------------------------------------------------------------
+// Initial state definition
+//
+FSM_INITIAL_STATE(Motor, Stopped)