1 /* 2 * Keypad event loop functionality. 3 * 4 * Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #ifdef __cplusplus 25 26 #include <l4/devices/event-loop.h> 27 #include <l4/util/util.h> 28 29 /* Keypad event loop abstraction. */ 30 31 class Keypad_event_loop : public Event_handler_loop<void> 32 { 33 public: 34 /* Initialise the event loop with a thread priority. */ 35 36 explicit Keypad_event_loop(int priority=0x20) 37 : Event_handler_loop(priority) 38 { 39 } 40 41 /* Event handler method. */ 42 43 virtual void handle() 44 { 45 _handler(); 46 l4_sleep(20); /* 20ms -> 50Hz */ 47 } 48 }; 49 50 #endif