374 lines
12 KiB
C++
374 lines
12 KiB
C++
#include <Wire.h>
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#define TRACKBALL_ADDR 0x0A
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#define TRACKBALL_REG_LEFT 0x04
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const byte PIN_A = 33;
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const byte PIN_B = 32;
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const byte PIN_C = 31;
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const byte PIN_D = 24;
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const byte PIN_E = 25;
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const byte PIN_F = 26;
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const byte PIN_MOUSE_UL = 27;
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const byte PIN_MOUSE_UR = 30;
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const byte PIN_MOUSE_DL = 28;
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const byte PIN_MOUSE_DR = 29;
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const byte PIN_LED1 = 6;
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const byte PIN_LED2 = 1;
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const byte PIN_LED3 = 3;
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const byte PIN_BALL_SDA = 18;
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const byte PIN_BALL_SCL = 19;
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const byte PIN_BALL_INT = 11;
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const byte BUTTON_A = 0;
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const byte BUTTON_B = 1;
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const byte BUTTON_C = 2;
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const byte BUTTON_D = 3;
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const byte BUTTON_E = 4;
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const byte BUTTON_F = 5;
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const byte BUTTON_MOUSE_UL = 6;
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const byte BUTTON_MOUSE_UR = 7;
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const byte BUTTON_MOUSE_DL = 8;
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const byte BUTTON_MOUSE_DR = 9;
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const int button_pins[10] = {
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PIN_A, PIN_B, PIN_C, PIN_D, PIN_E, PIN_F,
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PIN_MOUSE_UL, PIN_MOUSE_UR, PIN_MOUSE_DL, PIN_MOUSE_DR
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};
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const int debounce_time = 400;
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int button_timers[10] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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// TODO: differentiate between GKOS modifiers and keyboard modifiers somehow
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/*
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backspace, space (keep those two first since they overlap with the rest )
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g, k, o, s, w, native
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*/
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const byte modifiers[8] = { 7, 56, 24, 48, 3, 6, 40, 5 };
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/*
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dash, backslash, slash, apostrophe, comma, exclamation point, question mark,
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period, up, down, page up, page down, shift, symbol shift, switch keyset,
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escape, control, alt, delete, insert, tab, enter
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*/
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const byte specials[22] = {
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17, 51, 30, 10, 20, 12, 33, 34, 9, 36, 27,
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54, 18, 45, 63, 31, 47, 55, 62, 43, 61, 59
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};
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enum SpecialType { PrintCharacter, PressKey, ToggleModifier };
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const byte special_action_types[22] = {
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0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 1, 1, 1, 1
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};
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enum Modifier { Shift, SymbolShift, Keyset, Control, Alt };
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const int special_action_targets[22] = {
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'-', '\\', '/', '\'', ',', '!', '?', '/', KEY_UP, KEY_DOWN, KEY_PAGE_UP,
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KEY_PAGE_DOWN, Modifier::Shift, Modifier::SymbolShift, Modifier::Keyset,
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KEY_ESC, Modifier::Control, Modifier::Alt, KEY_DELETE, KEY_INSERT,
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KEY_TAB, KEY_ENTER
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};
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byte key_pressed = 0;
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byte key_pressed_total = 0;
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bool modifier_used = false;
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bool modified_pressed = false;
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void setup() {
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pinMode(PIN_A, INPUT_PULLUP);
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pinMode(PIN_B, INPUT_PULLUP);
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pinMode(PIN_C, INPUT_PULLUP);
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pinMode(PIN_D, INPUT_PULLUP);
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pinMode(PIN_E, INPUT_PULLUP);
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pinMode(PIN_F, INPUT_PULLUP);
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pinMode(PIN_MOUSE_UL, INPUT_PULLUP);
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pinMode(PIN_MOUSE_UR, INPUT_PULLUP);
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pinMode(PIN_MOUSE_DL, INPUT_PULLUP);
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pinMode(PIN_MOUSE_DR, INPUT_PULLUP);
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pinMode(PIN_LED1, OUTPUT);
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pinMode(PIN_LED2, OUTPUT);
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pinMode(PIN_LED3, OUTPUT);
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Serial.begin(115200);
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Serial.println("helo");
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Wire.begin();
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}
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void loop() {
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for (byte b = 0; b < 10; b++) {
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// button is pressed
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if (!digitalRead(button_pins[b])) {
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// increment button timer if it's not full
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if (button_timers[b] < debounce_time)
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button_timers[b]++;
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// update pressed gkos keys
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else if (b < 6) {
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key_pressed |= 1 << b;
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key_pressed_total |= 1 << b;
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}
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}
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// button is released
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else {
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// if the button had been debounced, it counts as a keypress
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if (button_timers[b] >= debounce_time) {
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if (b < 6) {
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key_pressed &= ~(1 << b);
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// gkos key was released, check if it completed a chord
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key_released(b);
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if (key_pressed == 0) {
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key_pressed_total = 0;
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// clear flags
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modifier_used = false;
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modified_pressed = false;
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}
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}
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}
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button_timers[b] = 0;
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}
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}
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}
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void key_released(byte key) {
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/*
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SPECIALS
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*/
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bool is_special = false;
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byte special = 0;
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for (byte b = 0; b < 22; b++) {
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if (key_pressed_total == specials[b]) {
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is_special = true;
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special = b;
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break;
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}
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}
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if (is_special && !modifier_used) {
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// only register a special keypress when all keys have been released
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if (key_pressed != 0)
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return;
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switch (special_action_types[special]) {
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case SpecialType::PrintCharacter:
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Keyboard.print((char)special_action_targets[special]);
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return;
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case SpecialType::PressKey:
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Keyboard.press(special_action_targets[special]);
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Keyboard.release(special_action_targets[special]);
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return;
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case SpecialType::ToggleModifier:
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// TODO
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return;
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}
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}
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/*
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MODIFIERS
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*/
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bool is_modifier = false;
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byte modifier = 0;
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for (byte b = 0; b < 8; b++) {
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if ((key_pressed_total & modifiers[b]) == modifiers[b]) {
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is_modifier = true;
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modifier = b;
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modifier_used = true;
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break;
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}
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}
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if (is_modifier) {
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switch (modifier) {
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case 0: // backspace
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.press(KEY_BACKSPACE);
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Keyboard.release(KEY_BACKSPACE);
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return;
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}
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if (key == BUTTON_D || key == BUTTON_E) {
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Keyboard.press(KEY_LEFT);
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Keyboard.release(KEY_LEFT);
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_F) {
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Keyboard.press(KEY_HOME);
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Keyboard.release(KEY_HOME);
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 1: // space
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.press(KEY_SPACE);
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Keyboard.release(KEY_SPACE);
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return;
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}
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if (key == BUTTON_A || key == BUTTON_B) {
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Keyboard.press(KEY_RIGHT);
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Keyboard.release(KEY_RIGHT);
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_C) {
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Keyboard.press(KEY_END);
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Keyboard.release(KEY_END);
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 2: // G
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.print('g');
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return;
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}
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if (key == BUTTON_A) {
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Keyboard.print('h');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_B) {
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Keyboard.print('i');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_C) {
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Keyboard.print('j');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 3: // K
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.print('k');
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return;
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}
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if (key == BUTTON_A) {
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Keyboard.print('l');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_B) {
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Keyboard.print('m');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_C) {
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Keyboard.print('n');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 4: // O
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.print('o');
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return;
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}
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if (key == BUTTON_D) {
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Keyboard.print('p');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_E) {
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Keyboard.print('q');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_F) {
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Keyboard.print('r');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 5: // S
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.print('s');
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return;
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}
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if (key == BUTTON_D) {
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Keyboard.print('t');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_E) {
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Keyboard.print('u');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_F) {
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Keyboard.print('v');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 6: // W
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if (!modified_pressed && key_pressed == 0 &&
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key_pressed_total == modifiers[modifier]) {
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Keyboard.print('w');
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return;
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}
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if (key == BUTTON_A) {
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Keyboard.print('x');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_B) {
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Keyboard.print('y');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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} else if (key == BUTTON_C) {
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Keyboard.print('z');
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key_pressed_total &= ~(1 << key);
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modified_pressed = true;
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return;
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}
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return;
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case 7: // native
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// TODO
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return;
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}
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}
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/*
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REGULAR KEYS
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*/
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switch (key) {
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case BUTTON_A:
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Keyboard.print('a');
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return;
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case BUTTON_B:
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Keyboard.print('b');
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return;
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case BUTTON_C:
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Keyboard.print('c');
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return;
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case BUTTON_D:
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Keyboard.print('d');
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return;
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case BUTTON_E:
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Keyboard.print('e');
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return;
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case BUTTON_F:
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Keyboard.print('f');
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return;
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default:
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Serial.print("unknown key ");
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Serial.println(key);
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return;
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}
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}
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