mirror of
https://github.com/trezor/trezor-firmware.git
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71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "buttons.h"
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struct buttonState button;
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#if !EMULATOR
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uint16_t buttonRead(void) { return gpio_port_read(BTN_PORT); }
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#endif
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void buttonUpdate(void) {
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static uint16_t last_state = BTN_PIN_YES | BTN_PIN_NO;
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uint16_t state = buttonRead();
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if ((state & BTN_PIN_YES) == 0) { // Yes button is down
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if ((last_state & BTN_PIN_YES) == 0) { // last Yes was down
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if (button.YesDown < 2000000000) button.YesDown++;
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button.YesUp = false;
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} else { // last Yes was up
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button.YesDown = 0;
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button.YesUp = false;
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}
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} else { // Yes button is up
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if ((last_state & BTN_PIN_YES) == 0) { // last Yes was down
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button.YesDown = 0;
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button.YesUp = true;
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} else { // last Yes was up
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button.YesDown = 0;
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button.YesUp = false;
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}
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}
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if ((state & BTN_PIN_NO) == 0) { // No button is down
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if ((last_state & BTN_PIN_NO) == 0) { // last No was down
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if (button.NoDown < 2000000000) button.NoDown++;
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button.NoUp = false;
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} else { // last No was up
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button.NoDown = 0;
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button.NoUp = false;
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}
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} else { // No button is up
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if ((last_state & BTN_PIN_NO) == 0) { // last No was down
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button.NoDown = 0;
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button.NoUp = true;
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} else { // last No was up
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button.NoDown = 0;
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button.NoUp = false;
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}
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}
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last_state = state;
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}
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