252 lines
8.1 KiB
C++
252 lines
8.1 KiB
C++
#include "TpagerKeyboard.h"
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#include <Tactility/hal/i2c/I2c.h>
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#include <driver/i2c.h>
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#include "freertos/queue.h"
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#include "driver/gpio.h"
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#include <Tactility/Log.h>
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#define TAG "tpager_keyboard"
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#define ENCODER_A GPIO_NUM_40
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#define ENCODER_B GPIO_NUM_41
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#define ENCODER_ENTER GPIO_NUM_7
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#define KB_ROWS 4
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#define KB_COLS 11
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// Lowercase Keymap
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static constexpr char keymap_lc[KB_ROWS][KB_COLS] = {
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{'\0', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'},
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{'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', '\n', '\0'},
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{'z', 'x', 'c', 'v', 'b', 'n', 'm', '\0', LV_KEY_BACKSPACE, ' ', '\0'},
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{'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'}
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};
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// Uppercase Keymap
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static constexpr char keymap_uc[KB_ROWS][KB_COLS] = {
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{'\0', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P'},
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{'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', '\n', '\0'},
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{'Z', 'X', 'C', 'V', 'B', 'N', 'M', '\0', LV_KEY_BACKSPACE, ' ', '\0'},
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{'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'}
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};
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// Symbol Keymap
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static constexpr char keymap_sy[KB_ROWS][KB_COLS] = {
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{'\0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'},
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{'.', '/', '+', '-', '=', ':', '\'', '"', '@', '\t', '\0'},
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{'_', '$', ';', '?', '!', ',', '.', '\0', LV_KEY_BACKSPACE, ' ', '\0'},
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{'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'}
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};
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static QueueHandle_t keyboardMsg;
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static void keyboard_read_callback(lv_indev_t* indev, lv_indev_data_t* data) {
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TpagerKeyboard* kb = (TpagerKeyboard*)lv_indev_get_user_data(indev);
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static bool enter_prev = false;
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char keypress = 0;
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// Defaults
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data->key = 0;
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data->state = LV_INDEV_STATE_RELEASED;
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if (xQueueReceive(keyboardMsg, &keypress, pdMS_TO_TICKS(50)) == pdPASS) {
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data->key = keypress;
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data->state = LV_INDEV_STATE_PRESSED;
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}
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}
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static void encoder_read_callback(lv_indev_t* indev, lv_indev_data_t* data) {
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TpagerKeyboard* kb = (TpagerKeyboard*)lv_indev_get_user_data(indev);
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const int enter_filter_threshold = 2;
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static int enter_filter = 0;
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const int pulses_click = 4;
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static int pulses_prev = 0;
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// Defaults
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data->enc_diff = 0;
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data->state = LV_INDEV_STATE_RELEASED;
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int pulses = kb->getEncoderPulses();
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int pulse_diff = (pulses - pulses_prev);
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if ((pulse_diff > pulses_click) || (pulse_diff < -pulses_click)) {
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data->enc_diff = pulse_diff / pulses_click;
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pulses_prev = pulses;
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}
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bool enter = !gpio_get_level(ENCODER_ENTER);
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if (enter && (enter_filter < enter_filter_threshold)) {
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enter_filter++;
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}
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if (!enter && (enter_filter > 0)) {
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enter_filter--;
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}
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if (enter_filter == enter_filter_threshold) {
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data->state = LV_INDEV_STATE_PRESSED;
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}
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}
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void TpagerKeyboard::processKeyboard() {
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static bool shift_pressed = false;
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static bool sym_pressed = false;
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static bool cap_toggle = false;
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static bool cap_toggle_armed = true;
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if (keypad->update()) {
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for (int i=0; i < keypad->pressed_key_count; i++) {
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auto row = keypad->pressed_list[i].row;
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auto col = keypad->pressed_list[i].col;
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auto hold = keypad->pressed_list[i].hold_time;
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if ((row == 1) && (col == 10)) {
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sym_pressed = true;
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}
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if ((row == 2) && (col == 7)) {
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shift_pressed = true;
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}
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}
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if ((sym_pressed && shift_pressed) && cap_toggle_armed) {
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cap_toggle = !cap_toggle;
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cap_toggle_armed = false;
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}
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for (int i=0; i<keypad->pressed_key_count; i++) {
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auto row = keypad->pressed_list[i].row;
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auto col = keypad->pressed_list[i].col;
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auto hold = keypad->pressed_list[i].hold_time;
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char chr = '\0';
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if (sym_pressed) {
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chr = keymap_sy[row][col];
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} else if (shift_pressed || cap_toggle) {
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chr = keymap_uc[row][col];
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} else {
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chr = keymap_lc[row][col];
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}
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if (chr != '\0') xQueueSend(keyboardMsg, (void *)&chr, portMAX_DELAY);
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}
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for (int i=0; i<keypad->released_key_count; i++) {
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auto row = keypad->released_list[i].row;
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auto col = keypad->released_list[i].col;
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if ((row == 1) && (col == 10)) {
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sym_pressed = false;
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}
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if ((row == 2) && (col == 7)) {
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shift_pressed = false;
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}
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}
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if ((!sym_pressed && !shift_pressed) && !cap_toggle_armed) {
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cap_toggle_armed = true;
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}
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}
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}
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bool TpagerKeyboard::start(lv_display_t* display) {
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initEncoder();
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keypad->init(KB_ROWS, KB_COLS);
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gpio_input_enable(ENCODER_ENTER);
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assert(inputTimer == nullptr);
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inputTimer = std::make_unique<tt::Timer>(tt::Timer::Type::Periodic, [this] {
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processKeyboard();
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});
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kbHandle = lv_indev_create();
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lv_indev_set_type(kbHandle, LV_INDEV_TYPE_KEYPAD);
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lv_indev_set_read_cb(kbHandle, &keyboard_read_callback);
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lv_indev_set_display(kbHandle, display);
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lv_indev_set_user_data(kbHandle, this);
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encHandle = lv_indev_create();
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lv_indev_set_type(encHandle, LV_INDEV_TYPE_ENCODER);
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lv_indev_set_read_cb(encHandle, &encoder_read_callback);
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lv_indev_set_display(encHandle, display);
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lv_indev_set_user_data(encHandle, this);
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inputTimer->start(20 / portTICK_PERIOD_MS);
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return true;
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}
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bool TpagerKeyboard::stop() {
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assert(inputTimer);
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inputTimer->stop();
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inputTimer = nullptr;
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lv_indev_delete(kbHandle);
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kbHandle = nullptr;
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lv_indev_delete(encHandle);
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encHandle = nullptr;
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return true;
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}
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bool TpagerKeyboard::isAttached() const {
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return tt::hal::i2c::masterHasDeviceAtAddress(keypad->getPort(), keypad->getAddress(), 100);
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}
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void TpagerKeyboard::initEncoder(void) {
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const int low_limit = -127;
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const int high_limit = 126;
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// Accum. count makes it that over- and underflows are automatically compensated.
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// Prerequisite: watchpoints at low and high limit
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pcnt_unit_config_t unit_config = {
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.low_limit = low_limit,
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.high_limit = high_limit,
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.flags = { .accum_count = 1 },
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};
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ESP_ERROR_CHECK(pcnt_new_unit(&unit_config, &encPcntUnit));
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pcnt_glitch_filter_config_t filter_config = {
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.max_glitch_ns = 1000,
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};
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ESP_ERROR_CHECK(pcnt_unit_set_glitch_filter(encPcntUnit, &filter_config));
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pcnt_chan_config_t chan_a_config = {
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.edge_gpio_num = ENCODER_A,
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.level_gpio_num = ENCODER_B,
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};
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pcnt_channel_handle_t pcnt_chan_a = NULL;
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ESP_ERROR_CHECK(pcnt_new_channel(encPcntUnit, &chan_a_config, &pcnt_chan_a));
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pcnt_chan_config_t chan_b_config = {
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.edge_gpio_num = ENCODER_B,
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.level_gpio_num = ENCODER_A,
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};
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pcnt_channel_handle_t pcnt_chan_b = NULL;
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ESP_ERROR_CHECK(pcnt_new_channel(encPcntUnit, &chan_b_config, &pcnt_chan_b));
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ESP_ERROR_CHECK(pcnt_channel_set_edge_action(pcnt_chan_a, PCNT_CHANNEL_EDGE_ACTION_DECREASE, PCNT_CHANNEL_EDGE_ACTION_INCREASE));
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ESP_ERROR_CHECK(pcnt_channel_set_level_action(pcnt_chan_a, PCNT_CHANNEL_LEVEL_ACTION_KEEP, PCNT_CHANNEL_LEVEL_ACTION_INVERSE));
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ESP_ERROR_CHECK(pcnt_channel_set_edge_action(pcnt_chan_b, PCNT_CHANNEL_EDGE_ACTION_INCREASE, PCNT_CHANNEL_EDGE_ACTION_DECREASE));
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ESP_ERROR_CHECK(pcnt_channel_set_level_action(pcnt_chan_b, PCNT_CHANNEL_LEVEL_ACTION_KEEP, PCNT_CHANNEL_LEVEL_ACTION_INVERSE));
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ESP_ERROR_CHECK(pcnt_unit_add_watch_point(encPcntUnit, low_limit));
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ESP_ERROR_CHECK(pcnt_unit_add_watch_point(encPcntUnit, high_limit));
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ESP_ERROR_CHECK(pcnt_unit_enable(encPcntUnit));
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ESP_ERROR_CHECK(pcnt_unit_clear_count(encPcntUnit));
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ESP_ERROR_CHECK(pcnt_unit_start(encPcntUnit));
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}
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int TpagerKeyboard::getEncoderPulses() {
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int pulses = 0;
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pcnt_unit_get_count(encPcntUnit, &pulses);
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return pulses;
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}
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extern std::shared_ptr<Tca8418> tca8418;
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std::shared_ptr<tt::hal::keyboard::KeyboardDevice> createKeyboard() {
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keyboardMsg = xQueueCreate(20, sizeof(char));
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return std::make_shared<TpagerKeyboard>(tca8418);
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}
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