60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
// Copyright 2022 Haute école d'ingénierie et d'architecture de Fribourg
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/****************************************************************************
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* @file constants.hpp
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* @author Serge Ayer <serge.ayer@hefr.ch>
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*
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* @brief Constants definition used for implementing the bike system
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*
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* @date 2023-08-20
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* @version 1.0.0
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***************************************************************************/
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#pragma once
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#include <stdint.h>
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#include "mbed.h"
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namespace bike_computer {
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// gear related constants
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static constexpr uint8_t kMinGear = 1;
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static constexpr uint8_t kMaxGear = 9;
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// smallest gear (= 1) corresponds to a gear size of 20
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// when the gear increases, the gear size descreases
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static constexpr uint8_t kMaxGearSize = 20;
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static constexpr uint8_t kMinGearSize = kMaxGearSize - kMinGear;
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// pedal related constants
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// When compiling and linking with gcc, we get a link error when using static
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// constexpr. The error is related to template instantiation.
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// definition of pedal rotation initial time (corresponds to 80 turn / min)
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static constexpr std::chrono::milliseconds kInitialPedalRotationTime = 750ms;
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// definition of pedal minimal rotation time (corresponds to 160 turn / min)
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static constexpr std::chrono::milliseconds kMinPedalRotationTime = 375ms;
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// definition of pedal maximal rotation time (corresponds to 10 turn / min)
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static constexpr std::chrono::milliseconds kMaxPedalRotationTime = 1500ms;
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// definition of pedal rotation time change upon acceleration/deceleration
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static constexpr std::chrono::milliseconds kDeltaPedalRotationTime = 25ms;
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static constexpr uint32_t kNbrOfSteps = static_cast<uint32_t>(
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(bike_computer::kMaxPedalRotationTime - bike_computer::kMinPedalRotationTime)
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.count() /
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bike_computer::kDeltaPedalRotationTime.count());
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} // namespace bike_computer
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