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main_debounce.c
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main_debounce.c
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/*
Copyright (c) 2023 Alexander Scholz
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.
*/
#include "pico/stdlib.h"
#include "debounce.h"
#ifdef RASPBERRYPI_PICO_W
#include "pico/cyw43_arch.h"
#endif
int main()
{
const uint button_pin = 15;
#ifdef RASPBERRYPI_PICO_W
const uint led_pin = CYW43_WL_GPIO_LED_PIN;
if (cyw43_arch_init())
{
return -1;
}
#else
const uint led_pin = PICO_DEFAULT_LED_PIN;
// initialize gpio pins and set directions
gpio_init(button_pin);
gpio_set_dir(button_pin, GPIO_IN);
gpio_init(led_pin);
gpio_set_dir(led_pin, GPIO_OUT);
#endif
// initialize button debouncer
debouncer button_deb;
button_deb.delay_time_us = 50000; // 50ms
// the last debounced state of the button
bool last_button_state = false;
// the current led on/off state
bool led_on = false;
while (true)
{
// insert raw button state into the debouncer
debounce_update(gpio_get(button_pin), &button_deb);
// if the (debounced) button state changed...
if (last_button_state != button_deb.state)
{
// set last_button_state
last_button_state = button_deb.state;
// change led on/off state if button was pressed down
if (last_button_state)
{
led_on = !led_on;
}
}
#ifdef RASPBERRYPI_PICO_W
cyw43_arch_gpio_put(led_pin, led_on);
#else
gpio_put(led_pin, led_on);
#endif
}
}