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203 lines
7.0 KiB
203 lines
7.0 KiB
/*
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* Copyright 2018 Jack Humbert <jack.humb@gmail.com>
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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 of the License, or
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* (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "encoder.h"
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// this is for unit testing
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#if defined(ENCODER_MOCK_SINGLE)
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# include "encoder/tests/mock.h"
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#elif defined(ENCODER_MOCK_SPLIT)
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# include "encoder/tests/mock_split.h"
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#else
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# include <gpio.h>
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# ifdef SPLIT_KEYBOARD
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# include "split_util.h"
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# endif
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#endif
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// for memcpy
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#include <string.h>
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#if !defined(ENCODER_RESOLUTIONS) && !defined(ENCODER_RESOLUTION)
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# define ENCODER_RESOLUTION 4
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#endif
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#if (!defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B)) && (!defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B))
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# error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B or ENCODERS_PAD_A_RIGHT and ENCODERS_PAD_B_RIGHT"
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#endif
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// on split keyboards, these are the pads and resolutions for the left half
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static pin_t encoders_pad_a[] = ENCODERS_PAD_A;
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static pin_t encoders_pad_b[] = ENCODERS_PAD_B;
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#ifdef ENCODER_RESOLUTIONS
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static uint8_t encoder_resolutions[] = ENCODER_RESOLUTIONS;
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#endif
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#ifndef SPLIT_KEYBOARD
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# define NUMBER_OF_ENCODERS (sizeof(encoders_pad_a) / sizeof(pin_t))
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#else
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// if no pads for right half are defined, we assume the keyboard is symmetric (i.e. same pads)
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# ifndef ENCODERS_PAD_A_RIGHT
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# define ENCODERS_PAD_A_RIGHT ENCODERS_PAD_A
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# endif
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# ifndef ENCODERS_PAD_B_RIGHT
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# define ENCODERS_PAD_B_RIGHT ENCODERS_PAD_B
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# endif
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# if defined(ENCODER_RESOLUTIONS) && !defined(ENCODER_RESOLUTIONS_RIGHT)
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# define ENCODER_RESOLUTIONS_RIGHT ENCODER_RESOLUTIONS
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# endif
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# define NUMBER_OF_ENCODERS ((sizeof(encoders_pad_a) + sizeof(encoders_pad_a_right)) / sizeof(pin_t))
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# define NUMBER_OF_ENCODERS_LEFT (sizeof(encoders_pad_a) / sizeof(pin_t))
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# define NUMBER_OF_ENCODERS_RIGHT (sizeof(encoders_pad_a_right) / sizeof(pin_t))
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static pin_t encoders_pad_a_right[] = ENCODERS_PAD_A_RIGHT;
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static pin_t encoders_pad_b_right[] = ENCODERS_PAD_B_RIGHT;
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# ifdef ENCODER_RESOLUTIONS_RIGHT
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static uint8_t encoder_resolutions_right[] = ENCODER_RESOLUTIONS_RIGHT;
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# endif
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#endif
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#ifndef ENCODER_DIRECTION_FLIP
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# define ENCODER_CLOCKWISE true
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# define ENCODER_COUNTER_CLOCKWISE false
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#else
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# define ENCODER_CLOCKWISE false
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# define ENCODER_COUNTER_CLOCKWISE true
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#endif
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static int8_t encoder_LUT[] = {0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0};
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static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0};
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static int8_t encoder_pulses[NUMBER_OF_ENCODERS] = {0};
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static uint8_t encoder_value[NUMBER_OF_ENCODERS] = {0};
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__attribute__((weak)) bool encoder_update_user(uint8_t index, bool clockwise) { return true; }
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__attribute__((weak)) bool encoder_update_kb(uint8_t index, bool clockwise) { return encoder_update_user(index, clockwise); }
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// number of encoders connected to this controller
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static uint8_t numEncodersHere;
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// index of the first encoder connected to this controller (only for right halves, this will be nonzero)
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static uint8_t firstEncoderHere;
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#ifdef SPLIT_KEYBOARD
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// index of the first encoder connected to the other half
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static uint8_t firstEncoderThere;
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#endif
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// the pads for this controller
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static pin_t* pad_a;
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static pin_t* pad_b;
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void encoder_init(void) {
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#ifndef SPLIT_KEYBOARD
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numEncodersHere = NUMBER_OF_ENCODERS;
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pad_a = encoders_pad_a;
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pad_b = encoders_pad_b;
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firstEncoderHere = 0;
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#else
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if (isLeftHand) {
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numEncodersHere = NUMBER_OF_ENCODERS_LEFT;
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pad_a = encoders_pad_a;
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pad_b = encoders_pad_b;
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firstEncoderHere = 0;
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firstEncoderThere = NUMBER_OF_ENCODERS_LEFT;
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} else {
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numEncodersHere = NUMBER_OF_ENCODERS_RIGHT;
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pad_a = encoders_pad_a_right;
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pad_b = encoders_pad_b_right;
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firstEncoderHere = NUMBER_OF_ENCODERS_LEFT;
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firstEncoderThere = 0;
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}
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#endif
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for (int i = 0; i < numEncodersHere; i++) {
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setPinInputHigh(pad_a[i]);
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setPinInputHigh(pad_b[i]);
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encoder_state[firstEncoderHere + i] = (readPin(pad_a[i]) << 0) | (readPin(pad_b[i]) << 1);
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}
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}
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static bool encoder_update(int8_t index, uint8_t state) {
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bool changed = false;
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#ifdef ENCODER_RESOLUTIONS
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# ifndef SPLIT_KEYBOARD
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int8_t resolution = encoder_resolutions[index];
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# else
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int8_t resolution = isLeftHand ? encoder_resolutions[index] : encoder_resolutions_right[index - NUMBER_OF_ENCODERS_LEFT];
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# endif
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#else
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uint8_t resolution = ENCODER_RESOLUTION;
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#endif
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encoder_pulses[index] += encoder_LUT[state & 0xF];
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if (encoder_pulses[index] >= resolution) {
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encoder_value[index]++;
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changed = true;
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encoder_update_kb(index, ENCODER_COUNTER_CLOCKWISE);
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}
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if (encoder_pulses[index] <= -resolution) { // direction is arbitrary here, but this clockwise
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encoder_value[index]--;
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changed = true;
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encoder_update_kb(index, ENCODER_CLOCKWISE);
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}
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encoder_pulses[index] %= resolution;
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#ifdef ENCODER_DEFAULT_POS
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if ((state & 0x3) == ENCODER_DEFAULT_POS) {
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encoder_pulses[index] = 0;
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}
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#endif
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return changed;
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}
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bool encoder_read(void) {
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bool changed = false;
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for (uint8_t i = 0; i < numEncodersHere; i++) {
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encoder_state[firstEncoderHere + i] <<= 2;
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encoder_state[firstEncoderHere + i] |= (readPin(pad_a[i]) << 0) | (readPin(pad_b[i]) << 1);
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changed |= encoder_update(firstEncoderHere + i, encoder_state[firstEncoderHere + i]);
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}
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return changed;
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}
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#ifdef SPLIT_KEYBOARD
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void last_encoder_activity_trigger(void);
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void encoder_state_raw(uint8_t* slave_state) { memcpy(slave_state, &encoder_value[firstEncoderHere], sizeof(uint8_t) * numEncodersHere); }
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void encoder_update_raw(uint8_t* slave_state) {
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bool changed = false;
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for (uint8_t i = 0; i < NUMBER_OF_ENCODERS - numEncodersHere; i++) {
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uint8_t index = firstEncoderThere + i;
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int8_t delta = slave_state[i] - encoder_value[index];
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while (delta > 0) {
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delta--;
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encoder_value[index]++;
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changed = true;
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encoder_update_kb(index, ENCODER_COUNTER_CLOCKWISE);
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}
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while (delta < 0) {
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delta++;
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encoder_value[index]--;
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changed = true;
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encoder_update_kb(index, ENCODER_CLOCKWISE);
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}
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}
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// Update the last encoder input time -- handled external to encoder_read() when we're running a split
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if (changed) last_encoder_activity_trigger();
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}
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#endif
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