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