mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 04:28:10 +00:00
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "encoder.hpp"
|
|
|
|
#include "utility.hpp"
|
|
|
|
#include "portapack.hpp"
|
|
#include "portapack_persistent_memory.hpp"
|
|
|
|
// Now supporting multiple levels of rotary encoder dial sensitivity
|
|
//
|
|
// Portapack H2 normally has a 30-step encoder, meaning one step (pulse) every
|
|
// 12 degrees of rotation.
|
|
//
|
|
// For each encoder "pulse" there are 4 state transitions, and we can choose
|
|
// between looking at all of them (high sensitivity), half of them (medium/default),
|
|
// or one quarter of them (low sensitivity).
|
|
static const int8_t transition_map[][16] = {
|
|
// Normal (Medium) Sensitivity -- default
|
|
{
|
|
0, // 0000: noop
|
|
0, // 0001: ccw start
|
|
0, // 0010: cw start
|
|
0, // 0011: rate
|
|
1, // 0100: cw end
|
|
0, // 0101: noop
|
|
0, // 0110: rate
|
|
-1, // 0111: ccw end
|
|
-1, // 1000: ccw end
|
|
0, // 1001: rate
|
|
0, // 1010: noop
|
|
1, // 1011: cw end
|
|
0, // 1100: rate
|
|
0, // 1101: cw start
|
|
0, // 1110: ccw start
|
|
0, // 1111: noop
|
|
},
|
|
// Low Sensitivity
|
|
{
|
|
0, // 0000: noop
|
|
0, // 0001: ccw start
|
|
0, // 0010: cw start
|
|
0, // 0011: rate
|
|
1, // 0100: cw end
|
|
0, // 0101: noop
|
|
0, // 0110: rate
|
|
0, // 0111: ccw end
|
|
-1, // 1000: ccw end
|
|
0, // 1001: rate
|
|
0, // 1010: noop
|
|
0, // 1011: cw end
|
|
0, // 1100: rate
|
|
0, // 1101: cw start
|
|
0, // 1110: ccw start
|
|
0, // 1111: noop
|
|
},
|
|
// High Sensitivity
|
|
{
|
|
0, // 0000: noop
|
|
-1, // 0001: ccw start
|
|
1, // 0010: cw start
|
|
0, // 0011: rate
|
|
1, // 0100: cw end
|
|
0, // 0101: noop
|
|
0, // 0110: rate
|
|
-1, // 0111: ccw end
|
|
-1, // 1000: ccw end
|
|
0, // 1001: rate
|
|
0, // 1010: noop
|
|
1, // 1011: cw end
|
|
0, // 1100: rate
|
|
1, // 1101: cw start
|
|
-1, // 1110: ccw start
|
|
0, // 1111: noop
|
|
},
|
|
};
|
|
|
|
int_fast8_t Encoder::update(
|
|
const uint_fast8_t phase_0,
|
|
const uint_fast8_t phase_1) {
|
|
state <<= 1;
|
|
state |= phase_0;
|
|
state <<= 1;
|
|
state |= phase_1;
|
|
|
|
// dial sensitivity setting is stored in pmem
|
|
return transition_map[portapack::persistent_memory::config_encoder_dial_sensitivity()][state & 0xf];
|
|
}
|