Add keyboard implementation for linux

meson.build

@@ -61,6 +61,7 @@ linux_src = src + ['openrtx/src/main.c',
                    'openrtx/src/state.c',
                    'openrtx/src/ui.c',
                    'platform/drivers/display/display_libSDL.c',
+                   'platform/drivers/keyboard/keyboard_linux.c',
                    'platform/mcu/x86_64/drivers/gpio.c',
                    'platform/mcu/x86_64/drivers/delays.c',
                    'platform/targets/linux/platform.c',

platform/drivers/keyboard/keyboard_linux.c

@@ -0,0 +1,56 @@
+/***************************************************************************
+ *   Copyright (C) 2020 by Federico Amedeo Izzo IU2NUO,                    *
+ *                         Niccolò Izzo IU2KIN                             *
+ *                         Frederik Saraci IU2NRO                          *
+ *                         Silvano Seva IU2KWO                             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#include <stdio.h>
+#include <stdint.h>
+#include "keyboard.h"
+#include <SDL2/SDL.h>
+
+uint32_t kbd_getKeys() {
+    SDL_Event event;
+    uint32_t keys = 0;
+    while ((SDL_PollEvent(&event)) != 0) {
+        if (event.type == SDL_QUIT)
+            exit(0);
+        //Ignore all non-keyboard events
+        if (event.type != SDL_KEYDOWN) return 0;
+        const uint8_t *state = SDL_GetKeyboardState(NULL);
+        if (state[SDL_SCANCODE_0]) keys |= KEY_0;
+        if (state[SDL_SCANCODE_1]) keys |= KEY_1;
+        if (state[SDL_SCANCODE_2]) keys |= KEY_2;
+        if (state[SDL_SCANCODE_3]) keys |= KEY_3;
+        if (state[SDL_SCANCODE_4]) keys |= KEY_4;
+        if (state[SDL_SCANCODE_5]) keys |= KEY_5;
+        if (state[SDL_SCANCODE_6]) keys |= KEY_6;
+        if (state[SDL_SCANCODE_7]) keys |= KEY_7;
+        if (state[SDL_SCANCODE_8]) keys |= KEY_8;
+        if (state[SDL_SCANCODE_9]) keys |= KEY_9;
+        if (state[SDLK_ASTERISK]) keys |= KEY_STAR;
+        if (state[SDL_SCANCODE_ESCAPE]) keys |= KEY_ESC;
+        if (state[SDL_SCANCODE_DOWN]) keys |= KEY_DOWN;
+        if (state[SDL_SCANCODE_UP]) keys |= KEY_UP;
+        if (state[SDL_SCANCODE_RETURN]) keys |= KEY_ENTER;
+        if (state[SDL_SCANCODE_NONUSHASH]) keys |= KEY_HASH;
+        if (state[SDL_SCANCODE_MINUS]) keys |= KEY_F1;
+        if (state[SDLK_PLUS]) keys |= KEY_MONI;
+        return keys;
+    }
+}
+