mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "encoder.hpp"
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#include "utility.hpp"
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#include "portapack.hpp"
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#include "portapack_persistent_memory.hpp"
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// Now supporting multiple levels of rotary encoder dial sensitivity
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//
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// Portapack H2 normally has a 30-step encoder, meaning one step (pulse) every
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// 12 degrees of rotation.
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//
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// For each encoder "pulse" there are 4 state transitions, and we can choose
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// between looking at all of them (high sensitivity), half of them (medium/default),
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// or one quarter of them (low sensitivity).
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static const int8_t transition_map[][16] = {
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// Normal (Medium) Sensitivity -- default
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{
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0, // 0000: noop
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0, // 0001: ccw start
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0, // 0010: cw start
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0, // 0011: rate
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1, // 0100: cw end
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0, // 0101: noop
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0, // 0110: rate
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-1, // 0111: ccw end
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-1, // 1000: ccw end
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0, // 1001: rate
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0, // 1010: noop
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1, // 1011: cw end
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0, // 1100: rate
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0, // 1101: cw start
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0, // 1110: ccw start
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0, // 1111: noop
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},
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// Low Sensitivity
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{
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0, // 0000: noop
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0, // 0001: ccw start
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0, // 0010: cw start
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0, // 0011: rate
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1, // 0100: cw end
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0, // 0101: noop
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0, // 0110: rate
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0, // 0111: ccw end
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-1, // 1000: ccw end
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0, // 1001: rate
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0, // 1010: noop
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0, // 1011: cw end
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0, // 1100: rate
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0, // 1101: cw start
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0, // 1110: ccw start
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0, // 1111: noop
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},
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// High Sensitivity
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{
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0, // 0000: noop
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-1, // 0001: ccw start
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1, // 0010: cw start
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0, // 0011: rate
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1, // 0100: cw end
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0, // 0101: noop
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0, // 0110: rate
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-1, // 0111: ccw end
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-1, // 1000: ccw end
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0, // 1001: rate
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0, // 1010: noop
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1, // 1011: cw end
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0, // 1100: rate
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1, // 1101: cw start
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-1, // 1110: ccw start
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0, // 1111: noop
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},
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};
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int_fast8_t Encoder::update(
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const uint_fast8_t phase_0,
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const uint_fast8_t phase_1) {
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state <<= 1;
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state |= phase_0;
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state <<= 1;
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state |= phase_1;
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// dial sensitivity setting is stored in pmem
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return transition_map[portapack::persistent_memory::config_encoder_dial_sensitivity()][state & 0xf];
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}
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