// Do not remove the include below #include "ArduinoKeyboard.h" // Copyright 2013 Jesse Vincent // All Rights Reserved. (To be licensed under an opensource license // before the release of the keyboard.io model 01 #include static const int COLS = 14; static const int ROWS = 5; static int colPins[COLS] = { 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }; static int rowPins[ROWS] = { A2, A3, A4, A5, 15 }; byte matrixState[ROWS][COLS]; long counter = 0; static const int LAYERS = 2; int current_keymap = 0; static const Key keymaps[LAYERS][ROWS][COLS] = { { { NoKey, Key_1, Key_2, Key_3, Key_4, Key_5, NoKey, NoKey, Key_6, Key_7, Key_8, Key_9, Key_0, NoKey } , { Key_Backtick, Key_Q, Key_W, Key_E, Key_R, Key_T, NoKey, NoKey, Key_Y, Key_U, Key_I, Key_O, Key_P, Key_Equals } , { Key_PageUp, Key_A, Key_S, Key_D, Key_F, Key_G, Key_Tab, Key_Return, Key_H, Key_J, Key_K, Key_L, Key_Semicolon, Key_Quote } , { Key_PageDown, Key_Z, Key_X, Key_C, Key_V, Key_B, Key_Esc, Key_Return, Key_N, Key_M, Key_Comma, Key_Period, Key_Slash, Key_Minus } , { Key_LeftGUI, Key_Backspace, Key_LeftShift, Key_LeftCtrl, Key_NextKeymapMomentary, NoKey, NoKey, NoKey, NoKey, Key_NextKeymapMomentary, Key_RightCtrl, Key_RightShift, Key_Space, Key_RightAlt } } , { { NoKey, Key_4, Key_2, Key_3, Key_4, Key_5, NoKey, NoKey, Key_6, Key_7, Key_8, Key_9, Key_0, NoKey } , { Key_Backtick, Key_Q, Key_W, Key_E, Key_R, Key_T, NoKey, NoKey, Key_Y, Key_U, Key_I, Key_O, Key_P, Key_Equals } , { Key_PageUp, Key_A, Key_S, Key_D, Key_F, Key_G, Key_Tab, Key_Return, Key_LeftArrow,Key_DownArrow,Key_UpArrow,Key_RightArrow, Key_Semicolon, Key_Quote } , { Key_PageDown, Key_Z, Key_X, Key_C, Key_V, Key_B, Key_Esc, Key_Return, Key_N, Key_M, Key_Comma, Key_Period, Key_Slash, Key_Minus } , { Key_LeftGUI, Key_Backspace, Key_LeftShift, Key_LeftCtrl, Key_NextKeymapMomentary, NoKey, NoKey, NoKey, NoKey, Key_NextKeymapMomentary, Key_RightCtrl, Key_RightShift, Key_Space, Key_RightAlt } } }; void reset_matrix() { for (int col = 0; col < COLS; col++) { for (int row = 0; row < ROWS; row++) { matrixState[row][col] <<= 1; } } } void send_key_event() { //for every newly pressed button, figure out what logical key it is and send a key down event // for every newly released button, figure out what logical key it is and send a key up event // TODO:switch to sending raw HID packets for (int row = 0; row < ROWS; row++) { for (int col = 0; col < COLS; col++) { if (key_toggled_on (matrixState[row][col])) { Keyboard.press(keymaps[current_keymap][row][col].rawKey); } else if (key_toggled_off (matrixState[row][col])) { Keyboard.release(keymaps[current_keymap][row][col].rawKey); } } } } boolean key_was_pressed (byte keyState) { if ( byte((keyState >> 4)) ^ B00001111 ){ return false; } else { return true; } } boolean key_was_not_pressed (byte keyState) { if ( byte((keyState >> 4)) ^ B00000000 ){ return false; } else { return true; } } boolean key_toggled_on(byte keyState) { if (key_is_pressed(keyState) && ( key_was_not_pressed(keyState))) { return true; } else { return false; } } boolean key_toggled_off(byte keyState) { if (key_was_pressed(keyState) && key_is_not_pressed(keyState)) { return true; } else { return false; } } boolean key_is_pressed (byte keyState) { if ( byte((keyState << 4)) ^ B11110000 ){ return false; } else { return true; } } boolean key_is_not_pressed (byte keyState) { if ( byte((keyState << 4)) ^ B00000000 ){ return false; } else { return true; } } void setup_matrix() { //set up the row pins as outputs for (int row = 0; row < ROWS; row++) { pinMode(rowPins[row], OUTPUT); digitalWrite(rowPins[row], HIGH); } for (int col = 0; col < COLS; col++) { pinMode(colPins[col], INPUT); digitalWrite(colPins[col], HIGH); //drive em high by default s it seems to be more reliable than driving em low } //blank out the matrix. for (int col = 0; col < COLS; col++) { for (int row = 0; row < ROWS; row++) { matrixState[row][col] = 0; } } } void scan_matrix() { //scan the keyboard matrix looking for connections for (int row = 0; row < ROWS; row++) { digitalWrite(rowPins[row], LOW); for (int col = 0; col < COLS; col++) { //If we see an electrical connection on I->J, if (digitalRead(colPins[col])) { matrixState[row][col] |= 0; // noop. just here for clarity } else { matrixState[row][col] |= 1; // noop. just here for clarity } // while we're inspecting the electrical matrix, we look // to see if the key being held is a firmware level // metakey, so we can act on it, lest we only discover // that we should be looking at a seconary keymap halfway through the matrix scan if ( keymaps[current_keymap][row][col].flags & MOMENTARY ) { if (key_toggled_on(matrixState[row][col]) ){ current_keymap++; } else if (key_toggled_off(matrixState[row][col]) ){ current_keymap--; } } // guard against layer overflow if (current_keymap >= LAYERS) { current_keymap = 0; } else if (current_keymap < 0) { current_keymap = LAYERS - 1; } } digitalWrite(rowPins[row], HIGH); } } void report_matrix() { if (counter++ %100 == 0 ) { for (int row = 0; row < ROWS; row++) { for (int col = 0; col < COLS; col++) { Serial.print(matrixState[row][col],HEX); Serial.print(", "); } Serial.println(""); } Serial.println(""); } } void report(int row, int col, boolean value) { Serial.print("Detected a change on "); Serial.print(col); Serial.print(" "); Serial.print(row); Serial.print(" to "); Serial.print(value); Serial.println("."); } void setup() { Keyboard.begin(); Serial.begin(115200); setup_matrix(); } void loop() { scan_matrix(); // report_matrix(); send_key_event(); reset_matrix(); }