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--- tutorials:arduino:irremote [2014/02/27 20:51]
aaron created
+++ tutorials:arduino:irremote [2014/02/28 10:14] (current)
sam
@@ Line 9: / Line 9: @@
 ===== Abstract =====
+How to do this,please refer to [[http://docs.cubieboard.org/tutorials/arduino/controlling_led |light led]] and [[http://docs.cubieboard.org/tutorials/arduino/connecting|how to connect cubieboard and arduino]]
 {{:tutorials:arduino:照片_6_.jpg|400}}
 ===== Headline =====
-==== Headline ====
+===== Source Code =====
+<code>
+/*
+ * Test send/receive functions of IRremote, using a pair of Arduinos.
+ *
+ * Arduino #1 should have an IR LED connected to the send pin (3).
+ * Arduino #2 should have an IR detector/demodulator connected to the
+ * receive pin (11) and a visible LED connected to pin 3.
+ *
+ * The cycle:
+ *  Arduino #1 will wait 2 seconds, then run through the tests.
+ *  It repeats this forever.
+ *  Arduino #2 will wait for at least one second of no signal-----
+ *  (to synchronize with #1).  It will then wait for the same test
+ *  signals.  It will log all the status to the serial port.  It will
+ *  also indicate status through the LED, which will flash each time a test
+ *  is completed.  If there is an error, it will light up for 5 seconds.
+ *
+ * The test passes if the LED flashes 19 times, pauses, and then repeats.
+ * The test fails if the LED lights for 5 seconds.
+ *
+ * The test software automatically decides which board is the sender and which is
+ * the receiver by looking for an input on the send pin, which will indicate
+ * the sender.  You should hook the serial port to the receiver for debugging.
+ *
+ * Copyright 2010 Ken Shirriff
+ * http://arcfn.com
+ */
+#include <IRremote.h>
-===== Headline =====
+int RECV_PIN = 11;
+int LED_PIN = 3;
+IRrecv irrecv(RECV_PIN);
+IRsend irsend;
+decode_results results;
+#define RECEIVER 1
+#define SENDER 2
+#define ERROR 3
+int mode;
+void setup()
+{
+  Serial.begin(9600);
+  // Check RECV_PIN to decide if we're RECEIVER or SENDER
+  if (digitalRead(RECV_PIN) == HIGH) {
+    mode = RECEIVER;
+    irrecv.enableIRIn();
+    pinMode(LED_PIN, OUTPUT);
+    digitalWrite(LED_PIN, LOW);
+    Serial.println("Receiver mode");
+  }
+  else {
+    mode = SENDER;
+    Serial.println("Sender mode");
+  }
+}
+// Wait for the gap between tests, to synchronize with
+// the sender.
+// Specifically, wait for a signal followed by a gap of at last gap ms.
+void waitForGap(int gap) {
+  Serial.println("Waiting for gap");
+  while (1) {
+    while (digitalRead(RECV_PIN) == LOW) {
+    }
+    unsigned long time = millis();
+    while (digitalRead(RECV_PIN) == HIGH) {
+      if (millis() - time > gap) {
+        return;
+      }
+    }
+  }
+}
+// Dumps out the decode_results structure.
+// Call this after IRrecv::decode()
+void dump(decode_results *results) {
+  int count = results->rawlen;
+  if (results->decode_type == UNKNOWN) {
+    Serial.println("Could not decode message");
+  }
+  else {
+    if (results->decode_type == NEC) {
+      Serial.print("Decoded NEC: ");
+    }
+    else if (results->decode_type == SONY) {
+      Serial.print("Decoded SONY: ");
+    }
+    else if (results->decode_type == RC5) {
+      Serial.print("Decoded RC5: ");
+    }
+    else if (results->decode_type == RC6) {
+      Serial.print("Decoded RC6: ");
+    }
+    Serial.print(results->value, HEX);
+    Serial.print(" (");
+    Serial.print(results->bits, DEC);
+    Serial.println(" bits)");
+  }
+  Serial.print("Raw (");
+  Serial.print(count, DEC);
+  Serial.print("): ");
+  for (int i = 0; i < count; i++) {
+    if ((i % 2) == 1) {
+      Serial.print(results->rawbuf[i]*USECPERTICK, DEC);
+    }
+    else {
+      Serial.print(-(int)results->rawbuf[i]*USECPERTICK, DEC);
+    }
+    Serial.print(" ");
+  }
+  Serial.println("");
+}
+// Test send or receive.
+// If mode is SENDER, send a code of the specified type, value, and bits
+// If mode is RECEIVER, receive a code and verify that it is of the
+// specified type, value, and bits.  For success, the LED is flashed;
+// for failure, the mode is set to ERROR.
+// The motivation behind this method is that the sender and the receiver
+// can do the same test calls, and the mode variable indicates whether
+// to send or receive.
+void test(char *label, int type, unsigned long value, int bits) {
+  if (mode == SENDER) {
+    Serial.println(label);
+    if (type == NEC) {
+      irsend.sendNEC(value, bits);
+    }
+    else if (type == SONY) {
+      irsend.sendSony(value, bits);
+    }
+    else if (type == RC5) {
+      irsend.sendRC5(value, bits);
+    }
+    else if (type == RC6) {
+      irsend.sendRC6(value, bits);
+    }
+    else {
+      Serial.print(label);
+      Serial.println("Bad type!");
+    }
+    delay(200);
+  }
+  else if (mode == RECEIVER) {
+    irrecv.resume(); // Receive the next value
+    unsigned long max_time = millis() + 30000;
+    Serial.print(label);
+    // Wait for decode or timeout
+    while (!irrecv.decode(&results)) {
+      if (millis() > max_time) {
+        Serial.println("Timeout receiving data");
+        mode = ERROR;
+        return;
+      }
+    }
+    if (type == results.decode_type && value == results.value && bits == results.bits) {
+      Serial.println (": OK");
+      digitalWrite(LED_PIN, HIGH);
+      delay(20);
+      digitalWrite(LED_PIN, LOW);
+    }
+    else {
+      Serial.println(": BAD");
+      dump(&results);
+      mode = ERROR;
+    }
+  }
+}
+// Test raw send or receive.  This is similar to the test method,
+// except it send/receives raw data.
+void testRaw(char *label, unsigned int *rawbuf, int rawlen) {
+  if (mode == SENDER) {
+    Serial.println(label);
+    irsend.sendRaw(rawbuf, rawlen, 38 /* kHz */);
+    delay(200);
+  }
+  else if (mode == RECEIVER ) {
+    irrecv.resume(); // Receive the next value
+    unsigned long max_time = millis() + 30000;
+    Serial.print(label);
+    // Wait for decode or timeout
+    while (!irrecv.decode(&results)) {
+      if (millis() > max_time) {
+        Serial.println("Timeout receiving data");
+        mode = ERROR;
+        return;
+      }
+    }
+    // Received length has extra first element for gap
+    if (rawlen != results.rawlen - 1) {
+      Serial.print("Bad raw length ");
+      Serial.println(results.rawlen, DEC);
+      mode = ERROR;
+      return;
+    }
+    for (int i = 0; i < rawlen; i++) {
+      long got = results.rawbuf[i+1] * USECPERTICK;
+      // Adjust for extra duration of marks
+      if (i % 2 == 0) {
+        got -= MARK_EXCESS;
+      }
+      else {
+        got += MARK_EXCESS;
+      }
+      // See if close enough, within 25%
+      if (rawbuf[i] * 1.25 < got || got * 1.25 < rawbuf[i]) {
+        Serial.println(": BAD");
+        dump(&results);
+        mode = ERROR;
+        return;
+      }
+    }
+    Serial.println (": OK");
+    digitalWrite(LED_PIN, HIGH);
+    delay(20);
+    digitalWrite(LED_PIN, LOW);
+  }
+}
+// This is the raw data corresponding to NEC 0x12345678
+unsigned int sendbuf[] = { /* NEC format */
+, 4500,
+, 560, 560, 560, 560, 560, 560, 1690, /* 1 */
+, 560, 560, 560, 560, 1690, 560, 560, /* 2 */
+, 560, 560, 560, 560, 1690, 560, 1690, /* 3 */
+, 560, 560, 1690, 560, 560, 560, 560, /* 4 */
+, 560, 560, 1690, 560, 560, 560, 1690, /* 5 */
+, 560, 560, 1690, 560, 1690, 560, 560, /* 6 */
+, 560, 560, 1690, 560, 1690, 560, 1690, /* 7 */
+, 1690, 560, 560, 560, 560, 560, 560, /* 8 */
+};
+void loop() {
+  if (mode == SENDER) {
+    delay(2000);  // Delay for more than gap to give receiver a better chance to sync.
+  }
+  else if (mode == RECEIVER) {
+    waitForGap(1000);
+  }
+  else if (mode == ERROR) {
+    // Light up for 5 seconds for error
+    digitalWrite(LED_PIN, HIGH);
+    delay(5000);
+    digitalWrite(LED_PIN, LOW);
+    mode = RECEIVER;  // Try again
+    return;
+  }
+  // The test suite.
+  test("SONY1", SONY, 0x123, 12);
+  test("SONY2", SONY, 0x000, 12);
+  test("SONY3", SONY, 0xfff, 12);
+  test("SONY4", SONY, 0x12345, 20);
+  test("SONY5", SONY, 0x00000, 20);
+  test("SONY6", SONY, 0xfffff, 20);
+  test("NEC1", NEC, 0x12345678, 32);
+  test("NEC2", NEC, 0x00000000, 32);
+  test("NEC3", NEC, 0xffffffff, 32);
+  test("NEC4", NEC, REPEAT, 32);
+  test("RC51", RC5, 0x12345678, 32);
+  test("RC52", RC5, 0x0, 32);
+  test("RC53", RC5, 0xffffffff, 32);
+  test("RC61", RC6, 0x12345678, 32);
+  test("RC62", RC6, 0x0, 32);
+  test("RC63", RC6, 0xffffffff, 32);
+  // Tests of raw sending and receiving.
+  // First test sending raw and receiving raw.
+  // Then test sending raw and receiving decoded NEC
+  // Then test sending NEC and receiving raw
+  testRaw("RAW1", sendbuf, 67);
+  if (mode == SENDER) {
+    testRaw("RAW2", sendbuf, 67);
+    test("RAW3", NEC, 0x12345678, 32);
+  }
+  else {
+    test("RAW2", NEC, 0x12345678, 32);
+    testRaw("RAW3", sendbuf, 67);
+  }
+}
+</code>
 === See Also ===

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