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firmware/gameport-adapter/AnalogJoystick.h

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+// This file is part of Necroware's GamePort adapter firmware.
+// Copyright (C) 2021 Necroware
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include "AnalogAxis.h"
+#include "DigitalPin.h"
+#include "GamePort.h"
+
+/// A common class for all analog joysticks.
+class AnalogJoystick {
+public:
+  /// Gets axis value.
+  ///
+  /// @param[in] id is the axes ID
+  /// @returns a value between 0 and 255
+  uint16_t getAxis(int id) {
+    switch (id) {
+      case 0:
+        return m_axis1.get();
+      case 1:
+        return m_axis2.get();
+      case 2:
+        return m_axis3.get();
+      case 3:
+        return m_axis4.get();
+      default:
+        return 0u;
+    }
+  }
+
+  /// Gets the buttons state as one byte.
+  ///
+  /// @returns a byte every bit represents a button
+  byte getButtons() {
+    return m_button1.isLow() | m_button2.isLow() << 1 | m_button3.isLow() << 2 | m_button4.isLow() << 3;
+  }
+
+private:
+  DigitalInput<GamePort<2>::pin> m_button1;
+  DigitalInput<GamePort<7>::pin> m_button2;
+  DigitalInput<GamePort<10>::pin> m_button3;
+  DigitalInput<GamePort<14>::pin> m_button4;
+  AnalogAxis<GamePort<3>::pin> m_axis1;
+  AnalogAxis<GamePort<6>::pin> m_axis2;
+  AnalogAxis<GamePort<11>::pin> m_axis3;
+  AnalogAxis<GamePort<13>::pin> m_axis4;
+};