9a081c2d52
This allows dealing with push-buttons on pins other than BOARD_BUTTON_PIN. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2010 Perry Hung.
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* Copyright (c) 2012 LeafLabs, LLC.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/*
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* Arduino-compatible digital I/O implementation.
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*/
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#include <wirish/io.h>
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#include <libmaple/gpio.h>
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#include <libmaple/timer.h>
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#include <wirish/wirish_time.h>
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#include <wirish/boards.h>
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uint32 digitalRead(uint8 pin) {
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if (pin >= BOARD_NR_GPIO_PINS) {
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return 0;
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}
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return gpio_read_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit) ?
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HIGH : LOW;
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}
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void digitalWrite(uint8 pin, uint8 val) {
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if (pin >= BOARD_NR_GPIO_PINS) {
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return;
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}
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gpio_write_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit, val);
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}
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void togglePin(uint8 pin) {
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if (pin >= BOARD_NR_GPIO_PINS) {
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return;
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}
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gpio_toggle_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit);
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}
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#define BUTTON_DEBOUNCE_DELAY 1
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uint8 isButtonPressed(uint8 pin, uint32 pressedLevel) {
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if (digitalRead(pin) == pressedLevel) {
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delay(BUTTON_DEBOUNCE_DELAY);
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while (digitalRead(pin) == pressedLevel)
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;
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return true;
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}
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return false;
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}
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uint8 waitForButtonPress(uint32 timeout) {
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uint32 start = millis();
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uint32 time;
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if (timeout == 0) {
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while (!isButtonPressed())
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;
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return true;
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}
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do {
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time = millis();
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/* properly handle wrap-around */
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if ((start > time && time + (0xffffffffU - start) > timeout) ||
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time - start > timeout) {
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return false;
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}
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} while (!isButtonPressed());
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return true;
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}
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