Merge pull request #2795 from adafruit/ir_demod

Adding IR demodulator examples

STEMMA_IR_Demodulator_Examples/Arduino_STEMMA_IR_Demodulator_Example/Arduino_STEMMA_IR_Demodulator_Example.ino

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+// SPDX-FileCopyrightText: 2024 Liz Clark for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+/*
+ * Based on the ReceiverDump.cpp from the
+ * Arduino-IRremote https://github.com/Arduino-IRremote/Arduino-IRremote.
+ * by Armin Joachimsmeyer
+ ************************************************************************************
+ * MIT License
+ *
+ * Copyright (c) 2020-2023 Armin Joachimsmeyer
+ * 
+ */
+
+#include <Arduino.h>
+#include <IRremote.hpp>
+
+#define IR_RECEIVE_PIN      5
+#define MARK_EXCESS_MICROS    20    // Adapt it to your IR receiver module. 20 is recommended for the cheap VS1838 modules.
+
+int ir_count = 0;
+bool ir_state = false;
+
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  Serial.begin(115200);
+  // Start the receiver and if not 3. parameter specified, take LED_BUILTIN pin from the internal boards definition as default feedback LED
+  IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK);
+  Serial.print(F("Ready to receive IR signals "));
+  Serial.print("at pin ");
+  Serial.println(IR_RECEIVE_PIN);
+
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  if (IrReceiver.decode()) {  // Grab an IR code
+        // At 115200 baud, printing takes 200 ms for NEC protocol and 70 ms for NEC repeat
+        ir_state = true;
+        Serial.println(); // blank line between entries
+        Serial.println(); // 2 blank lines between entries
+        IrReceiver.printIRResultShort(&Serial);
+        if (IrReceiver.decodedIRData.flags & IRDATA_FLAGS_WAS_OVERFLOW) {
+            Serial.print("Try to increase the \"RAW_BUFFER_LENGTH\" value of ");
+            Serial.println(RAW_BUFFER_LENGTH);
+            // see also https://github.com/Arduino-IRremote/Arduino-IRremote#compile-options--macros-for-this-library
+        } else {
+          Serial.println(); 
+          Serial.println("IR signal received!");
+          IrReceiver.printIRResultRawFormatted(&Serial, true);  // Output the results in RAW format
+          ir_count += 1;
+          Serial.print("Signal count: ");
+          Serial.println(ir_count);
+          Serial.println(); 
+        }
+   IrReceiver.resume();
+  }
+  else {
+    ir_state = false;
+  }
+
+}

STEMMA_IR_Demodulator_Examples/CircuitPython/code.py

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+# SPDX-FileCopyrightText: Copyright (c) 2024 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import pulseio
+import board
+
+pulses = pulseio.PulseIn(board.D5)
+pulse = False
+pulse_count = 0
+
+while True:
+
+    # Wait for an active pulse
+    while len(pulses) == 0:
+        if pulse:
+            pulse = False
+
+    if len(pulses) != 0 and not pulse:
+        pulse_count += 1
+        print(f"pulses detected {pulse_count} times")
+        pulse = True
+    # Pause while we do something with the pulses
+    pulses.pause()
+    # Print the pulses. pulses[0] is an active pulse unless the length
+    # reached max length and idle pulses are recorded.
+    print(pulses[0])
+    # Clear the rest
+    pulses.clear()
+    # Resume with an 80 microsecond active pulse
+    pulses.resume(80)