Tested for ATtiny85

Author: ArminJo

README.md

@@ -81,6 +81,7 @@ If you do not know which protocol your IR transmitter uses, you have several cho
  the old [IRLib](https://github.com/cyborg5/IRLib) and [Infrared4Arduino](https://github.com/bengtmartensson/Infrared4Arduino).
 - To **increase strength of sent output signal** you can increase the current through the send diode, and/or use 2 diodes in series,
  since one IR diode requires only 1.5 volt.
+ - The default software generated PWM has problems on ATtinies running with 8 MHz. The PWM frequency is around 30 instead of 38 kHz and RC6 is not reliable.
 
 # Examples
 ### SimpleReceiver + SimpleSender

examples/ControlRelay/PinDefinitionsAndMore.h

@@ -69,15 +69,15 @@
 #define IR_TIMING_TEST_PIN      PA5
 
 #elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny87__) || defined(__AVR_ATtiny167__)
-//#include "ATtinySerialOut.h"
 #  if  defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
-#    if defined(ARDUINO_AVR_DIGISPARK)
+#    if defined(ARDUINO_AVR_DIGISPARK) // tested with 16 and 8 MHz
+//#include "ATtinySerialOut.h" // saves 370 bytes program space and 38 bytes RAM
 #define LED_BUILTIN     PB1
 #    endif
 #define IR_RECEIVE_PIN  0
 #define IR_SEND_PIN     4 // Pin 2 is serial output with ATtinySerialOut. Pin 1 is internal LED and Pin3 is USB+ with pullup on Digispark board.
 #define TONE_PIN        3
-//#define IR_TIMING_TEST_PIN 3
+#define IR_TIMING_TEST_PIN 3
 
 #  else
 // ATtiny87 + ATtiny167 here. For ATtiny167 Pins PB6 and PA3 are usable as interrupt source.

examples/ReceiveAndSend/PinDefinitionsAndMore.h

@@ -69,15 +69,15 @@
 #define IR_TIMING_TEST_PIN      PA5
 
 #elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny87__) || defined(__AVR_ATtiny167__)
-//#include "ATtinySerialOut.h"
 #  if  defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
-#    if defined(ARDUINO_AVR_DIGISPARK)
+#    if defined(ARDUINO_AVR_DIGISPARK) // tested with 16 and 8 MHz
+//#include "ATtinySerialOut.h" // saves 370 bytes program space and 38 bytes RAM
 #define LED_BUILTIN     PB1
 #    endif
 #define IR_RECEIVE_PIN  0
 #define IR_SEND_PIN     4 // Pin 2 is serial output with ATtinySerialOut. Pin 1 is internal LED and Pin3 is USB+ with pullup on Digispark board.
 #define TONE_PIN        3
-//#define IR_TIMING_TEST_PIN 3
+#define IR_TIMING_TEST_PIN 3
 
 #  else
 // ATtiny87 + ATtiny167 here. For ATtiny167 Pins PB6 and PA3 are usable as interrupt source.

examples/ReceiveDemo/PinDefinitionsAndMore.h

@@ -69,15 +69,15 @@
 #define IR_TIMING_TEST_PIN      PA5
 
 #elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny87__) || defined(__AVR_ATtiny167__)
-//#include "ATtinySerialOut.h"
 #  if  defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
-#    if defined(ARDUINO_AVR_DIGISPARK)
+#    if defined(ARDUINO_AVR_DIGISPARK) // tested with 16 and 8 MHz
+//#include "ATtinySerialOut.h" // saves 370 bytes program space and 38 bytes RAM
 #define LED_BUILTIN     PB1
 #    endif
 #define IR_RECEIVE_PIN  0
 #define IR_SEND_PIN     4 // Pin 2 is serial output with ATtinySerialOut. Pin 1 is internal LED and Pin3 is USB+ with pullup on Digispark board.
 #define TONE_PIN        3
-//#define IR_TIMING_TEST_PIN 3
+#define IR_TIMING_TEST_PIN 3
 
 #  else
 // ATtiny87 + ATtiny167 here. For ATtiny167 Pins PB6 and PA3 are usable as interrupt source.

examples/ReceiveDemo/ReceiveDemo.ino

@@ -2,6 +2,7 @@
  * ReceiveDemo.cpp
  *
  * Demonstrates receiving IR codes with the IRremote library.
+ * If debug button is pressed (pin connected to ground) a long output is generated.
  *
  *  This file is part of Arduino-IRremote https://github.com/Arduino-IRremote/Arduino-IRremote.
  *
@@ -39,13 +40,13 @@
 //#define DECODE_LG           1
 //#define DECODE_NEC          1
 // etc. see IRremote.h
-
+//
 //#define DISABLE_LED_FEEDBACK_FOR_RECEIVE // saves 108 bytes program space
-
-#if defined(__AVR_ATtiny85__)
+#if FLASHEND > 0x1FFF
 #define EXCLUDE_EXOTIC_PROTOCOLS
 #endif
 //#define EXCLUDE_EXOTIC_PROTOCOLS // saves around 670 bytes program space if all protocols are active
+//#define IR_MEASURE_TIMING
 
 // MARK_EXCESS_MICROS is subtracted from all marks and added to all spaces before decoding,
 // to compensate for the signal forming of different IR receiver modules.
@@ -59,7 +60,7 @@
 #include <IRremote.h>
 
 #if defined(APPLICATION_PIN)
-#define DEBUG_BUTTON_PIN    APPLICATION_PIN // if held low, print timing for each received data
+#define DEBUG_BUTTON_PIN    APPLICATION_PIN // if low, print timing for each received data set
 #else
 #define DEBUG_BUTTON_PIN   6
 #endif
@@ -70,7 +71,10 @@
 #endif
 
 void setup() {
-#if !defined(__AVR_ATtiny85__)
+#if defined(IR_MEASURE_TIMING) && defined(IR_TIMING_TEST_PIN)
+    pinMode(IR_TIMING_TEST_PIN, OUTPUT);
+#endif
+#if FLASHEND > 0x1FFF
     pinMode(DEBUG_BUTTON_PIN, INPUT_PULLUP);
 #endif
 
@@ -93,6 +97,11 @@ void setup() {
     Serial.print(F("Ready to receive IR signals at pin "));
     Serial.println(IR_RECEIVE_PIN);
 
+#if FLASHEND > 0x1FFF
+    Serial.print(F("Debug button pin is "));
+    Serial.println(DEBUG_BUTTON_PIN);
+#endif
+
     // infos for receive
     Serial.print(MARK_EXCESS_MICROS);
     Serial.println(F(" us are subtracted from all marks and added to all spaces for decoding"));

examples/ReceiveDump/PinDefinitionsAndMore.h

@@ -69,15 +69,15 @@
 #define IR_TIMING_TEST_PIN      PA5
 
 #elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny87__) || defined(__AVR_ATtiny167__)
-//#include "ATtinySerialOut.h"
 #  if  defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
-#    if defined(ARDUINO_AVR_DIGISPARK)
+#    if defined(ARDUINO_AVR_DIGISPARK) // tested with 16 and 8 MHz
+//#include "ATtinySerialOut.h" // saves 370 bytes program space and 38 bytes RAM
 #define LED_BUILTIN     PB1
 #    endif
 #define IR_RECEIVE_PIN  0
 #define IR_SEND_PIN     4 // Pin 2 is serial output with ATtinySerialOut. Pin 1 is internal LED and Pin3 is USB+ with pullup on Digispark board.
 #define TONE_PIN        3
-//#define IR_TIMING_TEST_PIN 3
+#define IR_TIMING_TEST_PIN 3
 
 #  else
 // ATtiny87 + ATtiny167 here. For ATtiny167 Pins PB6 and PA3 are usable as interrupt source.

examples/SendBoseWaveDemo/PinDefinitionsAndMore.h

@@ -69,15 +69,15 @@
 #define IR_TIMING_TEST_PIN      PA5
 
 #elif defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) || defined(__AVR_ATtiny87__) || defined(__AVR_ATtiny167__)
-//#include "ATtinySerialOut.h"
 #  if  defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
-#    if defined(ARDUINO_AVR_DIGISPARK)
+#    if defined(ARDUINO_AVR_DIGISPARK) // tested with 16 and 8 MHz
+//#include "ATtinySerialOut.h" // saves 370 bytes program space and 38 bytes RAM
 #define LED_BUILTIN     PB1
 #    endif
 #define IR_RECEIVE_PIN  0
 #define IR_SEND_PIN     4 // Pin 2 is serial output with ATtinySerialOut. Pin 1 is internal LED and Pin3 is USB+ with pullup on Digispark board.
 #define TONE_PIN        3
-//#define IR_TIMING_TEST_PIN 3
+#define IR_TIMING_TEST_PIN 3
 
 #  else
 // ATtiny87 + ATtiny167 here. For ATtiny167 Pins PB6 and PA3 are usable as interrupt source.