/* * This file is part of the TREZOR project. * * Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com> * * This library is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This library 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library. If not, see <http://www.gnu.org/licenses/>. */ #include "buttons.h" struct buttonState button; void buttonUpdate() { uint16_t state; static uint16_t last_state = BTN_PIN_YES | BTN_PIN_NO; state = gpio_port_read(BTN_PORT); if ((state & BTN_PIN_YES) == 0) { // Yes button is down if ((last_state & BTN_PIN_YES) == 0) { // last Yes was down if (button.YesDown < 2000000000) button.YesDown++; button.YesUp = false; } else { // last Yes was up button.YesDown = 0; button.YesUp = false; } } else { // Yes button is up if ((last_state & BTN_PIN_YES) == 0) { // last Yes was down button.YesDown = 0; button.YesUp = true; } else { // last Yes was up button.YesDown = 0; button.YesUp = false; } } if ((state & BTN_PIN_NO) == 0) { // No button is down if ((last_state & BTN_PIN_NO) == 0) { // last No was down if (button.NoDown < 2000000000) button.NoDown++; button.NoUp = false; } else { // last No was up button.NoDown = 0; button.NoUp = false; } } else { // No button is up if ((last_state & BTN_PIN_NO) == 0) { // last No was down button.NoDown = 0; button.NoUp = true; } else { // last No was up button.NoDown = 0; button.NoUp = false; } } last_state = state; }