214 lines
7.3 KiB
C
214 lines
7.3 KiB
C
/*
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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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#ifdef SPLIT_KEYBOARD
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# include "split_util.h"
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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)
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# error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B"
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#endif
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extern volatile bool isLeftHand;
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static pin_t encoders_pad_a[NUM_ENCODERS_MAX_PER_SIDE] = ENCODERS_PAD_A;
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static pin_t encoders_pad_b[NUM_ENCODERS_MAX_PER_SIDE] = ENCODERS_PAD_B;
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#ifdef ENCODER_RESOLUTIONS
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static uint8_t encoder_resolutions[NUM_ENCODERS] = ENCODER_RESOLUTIONS;
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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[NUM_ENCODERS] = {0};
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static int8_t encoder_pulses[NUM_ENCODERS] = {0};
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// encoder counts
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static uint8_t thisCount;
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#ifdef SPLIT_KEYBOARD
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// encoder offsets for each hand
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static uint8_t thisHand, thatHand;
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// encoder counts for each hand
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static uint8_t thatCount;
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#endif
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static uint8_t encoder_value[NUM_ENCODERS] = {0};
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__attribute__((weak)) void encoder_wait_pullup_charge(void) {
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wait_us(100);
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}
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__attribute__((weak)) bool encoder_update_user(uint8_t index, bool clockwise) {
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return true;
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}
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__attribute__((weak)) bool encoder_update_kb(uint8_t index, bool clockwise) {
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return encoder_update_user(index, clockwise);
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}
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void encoder_init(void) {
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#ifdef SPLIT_KEYBOARD
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thisHand = isLeftHand ? 0 : NUM_ENCODERS_LEFT;
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thatHand = NUM_ENCODERS_LEFT - thisHand;
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thisCount = isLeftHand ? NUM_ENCODERS_LEFT : NUM_ENCODERS_RIGHT;
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thatCount = isLeftHand ? NUM_ENCODERS_RIGHT : NUM_ENCODERS_LEFT;
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#else // SPLIT_KEYBOARD
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thisCount = NUM_ENCODERS;
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#endif
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#ifdef ENCODER_TESTS
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// Annoying that we have to clear out values during initialisation here, but
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// because all the arrays are static locals, rerunning tests in the same
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// executable doesn't reset any of these. Kinda crappy having test-only code
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// here, but it's the simplest solution.
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memset(encoder_value, 0, sizeof(encoder_value));
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memset(encoder_state, 0, sizeof(encoder_state));
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memset(encoder_pulses, 0, sizeof(encoder_pulses));
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static const pin_t encoders_pad_a_left[] = ENCODERS_PAD_A;
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static const pin_t encoders_pad_b_left[] = ENCODERS_PAD_B;
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for (uint8_t i = 0; i < thisCount; i++) {
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encoders_pad_a[i] = encoders_pad_a_left[i];
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encoders_pad_b[i] = encoders_pad_b_left[i];
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}
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#endif
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#if defined(SPLIT_KEYBOARD) && defined(ENCODERS_PAD_A_RIGHT) && defined(ENCODERS_PAD_B_RIGHT)
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// Re-initialise the pads if it's the right-hand side
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if (!isLeftHand) {
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static const pin_t encoders_pad_a_right[] = ENCODERS_PAD_A_RIGHT;
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static const pin_t encoders_pad_b_right[] = ENCODERS_PAD_B_RIGHT;
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for (uint8_t i = 0; i < thisCount; i++) {
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encoders_pad_a[i] = encoders_pad_a_right[i];
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encoders_pad_b[i] = encoders_pad_b_right[i];
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}
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}
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#endif // defined(SPLIT_KEYBOARD) && defined(ENCODERS_PAD_A_RIGHT) && defined(ENCODERS_PAD_B_RIGHT)
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// Encoder resolutions is handled purely master-side, so concatenate the two arrays
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#if defined(SPLIT_KEYBOARD) && defined(ENCODER_RESOLUTIONS)
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# if defined(ENCODER_RESOLUTIONS_RIGHT)
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static const uint8_t encoder_resolutions_right[NUM_ENCODERS_RIGHT] = ENCODER_RESOLUTIONS_RIGHT;
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# else // defined(ENCODER_RESOLUTIONS_RIGHT)
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static const uint8_t encoder_resolutions_right[NUM_ENCODERS_RIGHT] = ENCODER_RESOLUTIONS;
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# endif // defined(ENCODER_RESOLUTIONS_RIGHT)
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for (uint8_t i = 0; i < NUM_ENCODERS_RIGHT; i++) {
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encoder_resolutions[NUM_ENCODERS_LEFT + i] = encoder_resolutions_right[i];
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}
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#endif // defined(SPLIT_KEYBOARD) && defined(ENCODER_RESOLUTIONS)
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for (uint8_t i = 0; i < thisCount; i++) {
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setPinInputHigh(encoders_pad_a[i]);
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setPinInputHigh(encoders_pad_b[i]);
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}
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encoder_wait_pullup_charge();
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for (uint8_t i = 0; i < thisCount; i++) {
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encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
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}
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}
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static bool encoder_update(uint8_t index, uint8_t state) {
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bool changed = false;
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uint8_t i = index;
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#ifdef ENCODER_RESOLUTIONS
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const uint8_t resolution = encoder_resolutions[i];
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#else
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const uint8_t resolution = ENCODER_RESOLUTION;
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#endif
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#ifdef SPLIT_KEYBOARD
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index += thisHand;
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#endif
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encoder_pulses[i] += encoder_LUT[state & 0xF];
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if (encoder_pulses[i] >= 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[i] <= -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[i] %= 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[i] = 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 < thisCount; i++) {
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uint8_t new_status = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
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if ((encoder_state[i] & 0x3) != new_status) {
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encoder_state[i] <<= 2;
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encoder_state[i] |= new_status;
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changed |= encoder_update(i, encoder_state[i]);
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}
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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) {
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memcpy(slave_state, &encoder_value[thisHand], sizeof(uint8_t) * thisCount);
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}
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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 < thatCount; i++) { // Note inverted logic -- we want the opposite side
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const uint8_t index = i + thatHand;
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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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