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#include <stdio.h>
#include "pico/stdlib.h"
#include "buttons.hpp"
#include "api.hpp"
// From pico-watch.c:
extern int app_btnpressed(int app_id, uint gpio);
extern void app_switch(int old_appid, int new_appid);
extern int current_app;
extern Api app_api;
// Debounce control
// See https://www.raspberrypi.org/forums/viewtopic.php?f=145&t=301522#p1812063
unsigned long button_last_pressed_time;
const int button_delay_time = 50; // 50ms worked fine for me .... change it to your needs/specs.
//const uint BUTTON_PINS[] = {BUTTON_HOME, BUTTON_SELECT, BUTTON_MODE, BUTTON_UP, BUTTON_DOWN};
void gpio_interrupt_cb(uint gpio, uint32_t events) {
if ((to_ms_since_boot(get_absolute_time())-button_last_pressed_time)>button_delay_time) {
if (app_api.m_interpret_button_press) {
if (gpio == BUTTON_HOME && (current_app != 0)) // Home app
app_switch(current_app, 0);
else
app_btnpressed(current_app, gpio);
}
app_api.button_last_set(gpio);
button_last_pressed_time = to_ms_since_boot(get_absolute_time());
}
}
void init_buttons() {
gpio_init(BUTTON_HOME);
gpio_pull_up(BUTTON_HOME);
gpio_set_irq_enabled_with_callback(BUTTON_HOME, GPIO_IRQ_EDGE_FALL , true, &gpio_interrupt_cb);
gpio_init(BUTTON_SELECT);
gpio_pull_up(BUTTON_SELECT);
gpio_set_irq_enabled_with_callback(BUTTON_SELECT, GPIO_IRQ_EDGE_FALL , true, &gpio_interrupt_cb);
gpio_init(BUTTON_MODE);
gpio_pull_up(BUTTON_MODE);
gpio_set_irq_enabled_with_callback(BUTTON_MODE, GPIO_IRQ_EDGE_FALL , true, &gpio_interrupt_cb);
gpio_init(BUTTON_DOWN);
gpio_pull_up(BUTTON_DOWN);
gpio_set_irq_enabled_with_callback(BUTTON_DOWN, GPIO_IRQ_EDGE_FALL , true, &gpio_interrupt_cb);
gpio_init(BUTTON_UP);
gpio_pull_up(BUTTON_UP);
gpio_set_irq_enabled_with_callback(BUTTON_UP, GPIO_IRQ_EDGE_FALL , true, &gpio_interrupt_cb);
/* For some reason for loop does not work… TODO
for (int i=0; i < NUMBER_OF_BUTTONS; i++) {
uint button = BUTTON_PINS[i];
gpio_init(button);
gpio_pull_up(button);
gpio_set_irq_enabled_with_callback(button, GPIO_IRQ_EDGE_FALL , true, &gpio_interrupt_cb);
}
*/
button_last_pressed_time = to_ms_since_boot(get_absolute_time());
}
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