Initial commit

src/buttons/buttons.cpp

@@ -0,0 +1,56 @@
+#include "defs/defs.h"
+#include "buttons.h"
+#include <Arduino.h>
+
+uint64_t lastPressedButtonTime = esp_timer_get_time();
+
+bool inactive = false;
+bool screenOff = false;
+
+bool k1_prev = HIGH;
+bool k2_prev = HIGH;
+bool k3_prev = HIGH;
+bool k4_prev = HIGH;
+
+void buttons_checkInactivity() {
+    uint64_t currentTime = esp_timer_get_time();
+    if (currentTime - lastPressedButtonTime > INACTIVITY_THRESHOLD_TIME_US && !screenOff) {
+        digitalWrite(BL_PIN, LOW);
+        screenKey = OFF_SCREEN;
+        screenOff = true;
+
+    } else if (currentTime - lastPressedButtonTime > LAST_PRESSED_BUTTON_THRESHOLD_TIME_US && !inactive) {        
+        screenKey = IDLE_SCREEN;
+        inactive = true;
+    }
+}
+
+uint8_t buttons_getPressedButtons() {
+    bool k1_current = digitalRead(K1_PIN);
+    bool k2_current = digitalRead(K2_PIN);
+    bool k3_current = digitalRead(K3_PIN);
+    bool k4_current = digitalRead(K4_PIN);
+
+    uint8_t retV = (
+        (k1_prev == HIGH && k1_current == LOW) << 3 | 
+        (k2_prev == HIGH && k2_current == LOW) << 2 |
+        (k3_prev == HIGH && k3_current == LOW) << 1 | 
+        (k4_prev == HIGH && k4_current == LOW)    
+    );
+
+    if (retV != 0) {
+        tone(SPK_PIN, BEEP_FREQ_HZ, BEEP_LEN_MS);
+        lastPressedButtonTime = esp_timer_get_time();
+        inactive = false;
+        screenOff = false;
+    }
+
+    k1_prev = k1_current;
+    k2_prev = k2_current;
+    k3_prev = k3_current;
+    k4_prev = k4_current;
+
+    delay(15);
+
+    return retV;
+}

src/buttons/buttons.h

@@ -0,0 +1,7 @@
+#ifndef BUTTONS_H
+#define BUTTONS_H
+
+uint8_t buttons_getPressedButtons();
+void buttons_checkInactivity();
+
+#endif