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https://github.com/jhbruhn/eurorack.git
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57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
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// 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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#include "midi2cv/drivers/encoder.h"
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void Encoder::Init() {
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
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GPIO_InitTypeDef gpio_init;
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gpio_init.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
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gpio_init.GPIO_Speed = GPIO_Speed_10MHz;
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gpio_init.GPIO_Mode = GPIO_Mode_IN;
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gpio_init.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOC, &gpio_init);
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switch_state_ = 0xff;
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quadrature_decoding_state_[0] = quadrature_decoding_state_[1] = 0xff;
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}
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void Encoder::Debounce() {
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switch_state_ = (switch_state_ << 1) | \
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GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_15);
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quadrature_decoding_state_[0] = (quadrature_decoding_state_[0] << 1) | \
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GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_13);
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quadrature_decoding_state_[1] = (quadrature_decoding_state_[1] << 1) | \
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GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_14);
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}
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