Differences

This shows you the differences between two versions of the page.

--- irdecode [2009/03/04 05:38] – created jonmash
+++ irdecode [2009/04/08 22:24] (current) – jonmash
@@ Line 1: / Line 1: @@
 <code cpp>
 /********************************************************
-*  Code to access the raw data coming from teh I2C thermo
+*  Code to access the raw data coming from the IR receiver
-*  pile array and dispay it on the console.
+*  and display it on the screen. I used this code to generate
+*  the code that sends commands to the tv.
 *  By: Jonathan Mash
 *  Date: Feb. 2009
-*  Based on work by: Jon McPhalen (www.jonmcphalen.com)
+*  Based on work by: Walter Anderson (wandrson@walteranderson.us)
 *********************************************************/
-int irPin = 2;
+#include <avr/interrupt.h>
-bool incoming_ir = false;
+#include <avr/io.h>
-void setup()
+#define TIMER_RESET  TCNT1 = 0
-{
+#define SAMPLE_SIZE  150
-  pinMode(irPin, INPUT);
+#define DEGBUG 0
-  Serial.begin(9600);
-  delay(25);
-  attachInterrupt(0, IRISR, FALLING);
-}
-void IRISR()
+int IRpin = 2;
-{
+unsigned int TimerValue[SAMPLE_SIZE];
-    incoming_ir = true;
+char direction[SAMPLE_SIZE];
+byte change_count;
+long time;
+int value;
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Analyze IR Remote");
+  TCCR1A = 0x00;          // COM1A1=0, COM1A0=0 => Disconnect Pin OC1 from Timer/Counter 1 -- PWM11=0,PWM10=0 => PWM Operation disabled
+  // ICNC1=0 => Capture Noise Canceler disabled -- ICES1=0 => Input Capture Edge Select (not used) -- CTC1=0 => Clear Timer/Counter 1 on Compare/Match
+  // CS12=0 CS11=1 CS10=1 => Set prescaler to clock/64
+  TCCR1B = 0x03;          // 16MHz clock with prescaler means TCNT1 increments every 4uS
+  // ICIE1=0 => Timer/Counter 1, Input Capture Interrupt Enable -- OCIE1A=0 => Output Compare A Match Interrupt Enable -- OCIE1B=0 => Output Compare B Match Interrupt Enable
+  // TOIE1=0 => Timer 1 Overflow Interrupt Enable
+  TIMSK1 = 0x00;
+  pinMode(IRpin, INPUT);
 }
 void loop()
 {
-  int key;
+  Serial.println("Waiting...");
+  change_count = 0;
-  if(incoming_ir == true)
+  while(digitalRead(IRpin) == HIGH) {}
-  {
+  TIMER_RESET;
-    key = getSircs();
+  TimerValue[change_count] = TCNT1;
+  direction[change_count++] = '0';
+  while (change_count < SAMPLE_SIZE) {
+    if (direction[change_count-1] == '0') {
+      while(digitalRead(IRpin) == LOW) {}
+      TimerValue[change_count] = TCNT1;
+      direction[change_count++] = '1';
+    } else {
+      while(digitalRead(IRpin) == HIGH) {}
+      TimerValue[change_count] = TCNT1;
+      direction[change_count++] = '0';
+    }
+  }
+  //Serial.println("Bit stream detected!");
+  change_count = 0;
+  time = (long) TimerValue[change_count] * 4;
+  change_count++;
+  while (change_count < SAMPLE_SIZE) {
+    time = (long) TimerValue[change_count] * 4;
-    if(key == 0x1D01)
+    if(direction[change_count-1] == '0' && direction[change_count] == '1')
-      Serial.println("POWER");
+    {
-    else if(key == 0x701)
+      Serial.print("\t//");
-      Serial.println("Volume UP");
+      Serial.print((int)change_count);
-    else if(key == 0x901)
+      Serial.print("\t");
-      Serial.println("Volume DN");
+      Serial.print("HIGH\t");
-    else
+      Serial.print("\t");
-      Serial.println("Unknown Command");
+      Serial.println(time - (long)TimerValue[change_count-1] * 4);
+      Serial.print("\toscillationWrite(led_pin, ");
+      Serial.print(time - (long)TimerValue[change_count-1] * 4);
+      Serial.println(");");
+    }
+    else if(direction[change_count-1] == '1' && direction[change_count] == '0')
+    {
+      Serial.print("\t//");
+      Serial.print((int)change_count);
+      Serial.print("\t");
+      Serial.print("LOW\t");
+      Serial.print("\t");
+      Serial.println(time - (long)TimerValue[change_count-1] * 4);
+      Serial.print("\tdelayMicroseconds(");
+      Serial.print(time - (long)TimerValue[change_count-1] * 4);
+      Serial.println(");");
+    }
+    change_count++;
   }
+  value=0;
-  Serial.println(analogRead(0));
+  delay(100);
-  delay(50);
 }
-int getSircs() {
-  int duration;
-  int irCode;
-  int mask;
-  incoming_ir = false;
-  // wait for start bit
-  do {
-    duration = pulseIn(irPin, HIGH);
-  } while (duration < 2000);
-  // get 12-bit SIRCS code
-  irCode = 0;						// clear ir code
-  mask = 1;						// set mask to bit 0
-  for (int idx = 0; idx < 16; idx++) {		        // get all 12 bits
-    duration = pulseIn(irPin, HIGH);		        // measure the bit pulse
-    if (duration >= 600)				// 1 bit?
-	irCode |= mask;					// yes, update ir code
-    mask <<= 1;						// shift mask to next bit
-  }
-  return irCode;
-}
 </code>

irdecode.1236145131.txt.gz · Last modified: 2009/03/04 05:38 by jonmash

Back to top