ADD speedometer and gear class

static_scheduling/gear_device.cpp

@@ -0,0 +1,83 @@
+// Copyright 2022 Haute école d'ingénierie et d'architecture de Fribourg
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/****************************************************************************
+ * @file gear_device.cpp
+ * @author Serge Ayer <serge.ayer@hefr.ch>
+ *
+ * @brief Gear Device implementation (static scheduling)
+ *
+ * @date 2023-08-20
+ * @version 1.0.0
+ ***************************************************************************/
+
+#include "gear_device.hpp"
+
+// from disco_h747i/wrappers
+#include <chrono>
+
+#include "joystick.hpp"
+#include "mbed_trace.h"
+
+#if MBED_CONF_MBED_TRACE_ENABLE
+#define TRACE_GROUP "GearDevice"
+#endif  // MBED_CONF_MBED_TRACE_ENABLE
+
+namespace static_scheduling {
+
+// definition of task execution time
+static constexpr std::chrono::microseconds kTaskRunTime = 100000us;
+
+GearDevice::GearDevice(Timer& timer) : _timer(timer) {}
+
+uint8_t GearDevice::getCurrentGear() {
+    std::chrono::microseconds initialTime = _timer.elapsed_time();
+    std::chrono::microseconds elapsedTime = std::chrono::microseconds::zero();
+    // we bound the change to one increment/decrement per call
+    bool hasChanged = false;
+    while (elapsedTime < kTaskRunTime) {
+        if (!hasChanged) {
+            disco::Joystick::State joystickState =
+                disco::Joystick::getInstance().getState();
+            switch (joystickState) {
+                case disco::Joystick::State::UpPressed:
+                    if (_currentGear < bike_computer::kMaxGear) {
+                        _currentGear++;
+                    }
+                    hasChanged = true;
+                    break;
+
+                case disco::Joystick::State::DownPressed:
+                    if (_currentGear > bike_computer::kMinGear) {
+                        _currentGear--;
+                    }
+                    hasChanged = true;
+                    break;
+
+                default:
+                    break;
+            }
+        }
+        elapsedTime = _timer.elapsed_time() - initialTime;
+    }
+    return _currentGear;
+}
+
+uint8_t GearDevice::getCurrentGearSize() const {
+    // simulate task computation by waiting for the required task run time
+    // wait_us(kTaskRunTime.count());
+    return bike_computer::kMaxGearSize - _currentGear;
+}
+
+}  // namespace static_scheduling

static_scheduling/gear_device.hpp

@@ -0,0 +1,50 @@
+// Copyright 2022 Haute école d'ingénierie et d'architecture de Fribourg
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/****************************************************************************
+ * @file gear_device.hpp
+ * @author Serge Ayer <serge.ayer@hefr.ch>
+ *
+ * @brief Gear Device header file (static scheduling)
+ *
+ * @date 2023-08-20
+ * @version 1.0.0
+ ***************************************************************************/
+
+#pragma once
+
+#include "constants.hpp"
+#include "mbed.h"
+
+namespace static_scheduling {
+
+class GearDevice {
+   public:
+    explicit GearDevice(Timer& timer);  // NOLINT(runtime/references)
+
+    // make the class non copyable
+    GearDevice(GearDevice&)            = delete;
+    GearDevice& operator=(GearDevice&) = delete;
+
+    // method called for updating the bike system
+    uint8_t getCurrentGear();
+    uint8_t getCurrentGearSize() const;
+
+   private:
+    // data members
+    uint8_t _currentGear = bike_computer::kMinGear;
+    Timer& _timer;
+};
+
+}  // namespace static_scheduling