refactored added new LCD

buttons.cpp

@@ -0,0 +1,33 @@
+#include "button.h"
+
+// Mode Button
+uint8_t g_current_mode_button_state = 1; // Pin is pulled high by default
+uint8_t g_previous_mode_button_state = 1;
+uint32_t g_last_debounce_time = 0;
+uint32_t g_debounce_delay = 50;
+
+void initButtons(void)
+{
+  Serial.print("initButtons:");
+  pinMode(MODE_BUTTON_PIN, INPUT_PULLUP); // Pin for switching screens button
+  Serial.println(" OK");
+}
+
+void handleButtons(void)
+{
+  g_previous_mode_button_state = g_current_mode_button_state;
+  g_current_mode_button_state = digitalRead(MODE_BUTTON_PIN);
+
+  // Check if button is now pressed and it was previously unpressed
+  if (g_current_mode_button_state == LOW && g_previous_mode_button_state == HIGH)
+  {
+    // We haven't waited long enough so ignore this press
+    if (millis() - g_last_debounce_time <= g_debounce_delay)
+    {
+      return;
+    }
+    Serial.println("Button pressed");
+    // Increment display state
+    g_last_debounce_time = millis();
+  }
+}