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82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
// Copyright 2013 Emilie Gillet.
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//
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// Author: Emilie Gillet (emilie.o.gillet@gmail.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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// See http://creativecommons.org/licenses/MIT/ for more information.
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//
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// -----------------------------------------------------------------------------
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//
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// Driver for rotary encoder.
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#pragma once
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#include <stm32f3xx_hal_conf.h>
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#include "stm32f3xx_hal_gpio.h"
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#include "stmlib/stmlib.h"
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class Encoder {
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public:
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Encoder() { }
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~Encoder() { }
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void Init();
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void Debounce();
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inline bool released() const {
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return switch_state_ == 0x7f;
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}
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inline bool just_pressed() const {
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return switch_state_ == 0x80;
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}
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inline bool pressed() const {
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return switch_state_ == 0x00;
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}
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inline bool pressed_immediate() const {
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return !HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_15);
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//return !GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_15);
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}
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inline int32_t increment() const {
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int32_t increment = 0;
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uint8_t a = quadrature_decoding_state_[0];
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uint8_t b = quadrature_decoding_state_[1];
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if ((a & 0x03) == 0x02 && (b & 0x03) == 0x00) {
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increment = -1;
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} else {
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if ((b & 0x03) == 0x02 && (a & 0x03) == 0x00) {
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increment = 1;
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}
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}
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return increment;
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}
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private:
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uint8_t switch_state_;
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uint8_t quadrature_decoding_state_[2];
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DISALLOW_COPY_AND_ASSIGN(Encoder);
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};
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extern Encoder encoder;
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