Public release

src/Input.cpp

@@ -0,0 +1,43 @@
+#include "Input.h"
+
+#include <esp32-hal-adc.h>
+
+void setupInputPinModes() {
+  pinMode(BTN_GPIO1, INPUT);
+  pinMode(BTN_GPIO2, INPUT);
+  pinMode(BTN_GPIO3, INPUT_PULLUP);  // Power button
+}
+
+// Get currently pressed button by reading ADC values (and digital for power
+// button)
+Button getPressedButton() {
+  // Check BTN_GPIO3 (Power button) - digital read
+  if (digitalRead(BTN_GPIO3) == LOW) return POWER;
+
+  // Check BTN_GPIO1 (4 buttons on resistor ladder)
+  const int btn1 = analogRead(BTN_GPIO1);
+  if (btn1 < BTN_RIGHT_VAL + BTN_THRESHOLD) return RIGHT;
+  if (btn1 < BTN_LEFT_VAL + BTN_THRESHOLD) return LEFT;
+  if (btn1 < BTN_CONFIRM_VAL + BTN_THRESHOLD) return CONFIRM;
+  if (btn1 < BTN_BACK_VAL + BTN_THRESHOLD) return BACK;
+
+  // Check BTN_GPIO2 (2 buttons on resistor ladder)
+  const int btn2 = analogRead(BTN_GPIO2);
+  if (btn2 < BTN_VOLUME_DOWN_VAL + BTN_THRESHOLD) return VOLUME_DOWN;
+  if (btn2 < BTN_VOLUME_UP_VAL + BTN_THRESHOLD) return VOLUME_UP;
+
+  return NONE;
+}
+
+Input getInput(const bool skipWait) {
+  const Button button = getPressedButton();
+  if (button == NONE) return {NONE, 0};
+
+  if (skipWait) {
+    return {button, 0};
+  }
+
+  const auto start = millis();
+  while (getPressedButton() == button) delay(50);
+  return {button, millis() - start};
+}