65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
#include <string.h>
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#include "hardware/gpio.h"
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#include "pinout.h"
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#include "buttons.h"
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static const uint8_t m_pins[NUM_BUTTONS] = {
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BTN_ON_PIN,
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BTN_OFF_PIN
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};
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static uint8_t m_events[NUM_BUTTONS];
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static uint32_t m_last_change_time[NUM_BUTTONS];
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static uint32_t m_states;
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void buttons_init(void)
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{
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for(int i = 0; i < NUM_BUTTONS; i++) {
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gpio_init(m_pins[i]);
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gpio_set_dir(m_pins[i], false); // true = output
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gpio_set_pulls(m_pins[i], true, false); // enable pullup
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}
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memset(m_events, 0, sizeof(m_events));
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memset(m_last_change_time, 0, sizeof(m_last_change_time));
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m_states = 0;
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}
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void buttons_update_state(uint32_t time_ms)
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{
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for(int i = 0; i < NUM_BUTTONS; i++) {
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bool is_pressed = gpio_get(m_pins[i]);
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bool was_pressed = (m_states >> i) != 0;
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m_events[i] = 0;
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if(is_pressed && !was_pressed) {
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m_events[i] |= BTN_EVENT_PRESSED;
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m_states |= (1 << i);
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m_last_change_time[i] = time_ms;
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} else if(!is_pressed && was_pressed) {
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m_events[i] |= BTN_EVENT_RELEASED;
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m_states &= ~(1 << i);
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m_last_change_time[i] = time_ms;
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}
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}
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}
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uint8_t buttons_get_events(button_id_t button)
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{
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return m_events[button];
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}
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bool buttons_is_pressed(button_id_t button)
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{
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return (m_states & (1 << button)) != 0;
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}
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uint32_t buttons_get_last_change_time(button_id_t button)
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{
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return m_last_change_time[button];
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}
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