From 67330bb22c04bfd75067d2e395857c2eff2e514b Mon Sep 17 00:00:00 2001
From: Rafi Khan <zetoslab@gmail.com>
Date: Thu, 23 Jul 2015 19:12:23 -0600
Subject: [PATCH] Add support for ATtiny85

---
 IRremoteInt.h                      | 36 ++++++++++++++++++++++++++++++
 examples/IRsendDemo/IRsendDemo.ino |  3 ---
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/IRremoteInt.h b/IRremoteInt.h
index 60f744a..47c6123 100644
--- a/IRremoteInt.h
+++ b/IRremoteInt.h
@@ -195,6 +195,10 @@ EXTERN  volatile irparams_t  irparams;
 #elif defined(__AVR_ATtiny84__)
   #define IR_USE_TIMER1
 
+//ATtiny85
+#elif defined(__AVR_ATtiny85__)
+  #define IR_USE_TIMER_TINY0   // tx = pin 1
+
 // Arduino Duemilanove, Diecimila, LilyPad, Mini, Fio, Nano, etc
 #else
 	//#define IR_USE_TIMER1   // tx = pin 9
@@ -551,7 +555,39 @@ EXTERN  volatile irparams_t  irparams;
 })
 #define TIMER_PWM_PIN        16
 
+// defines for timer_tiny0 (8 bits)
+#elif defined(IR_USE_TIMER_TINY0)
+#define TIMER_RESET
+#define TIMER_ENABLE_PWM     (TCCR0A |= _BV(COM0B1))
+#define TIMER_DISABLE_PWM    (TCCR0A &= ~(_BV(COM0B1)))
+#define TIMER_ENABLE_INTR    (TIMSK |= _BV(OCIE0A))
+#define TIMER_DISABLE_INTR   (TIMSK &= ~(_BV(OCIE0A)))
+#define TIMER_INTR_NAME      TIMER0_COMPA_vect
+#define TIMER_CONFIG_KHZ(val) ({ \
+  const uint8_t pwmval = SYSCLOCK / 2000 / (val); \
+  TCCR0A = _BV(WGM00); \
+  TCCR0B = _BV(WGM02) | _BV(CS00); \
+  OCR0A = pwmval; \
+  OCR0B = pwmval / 3; \
+})
+#define TIMER_COUNT_TOP      (SYSCLOCK * USECPERTICK / 1000000)
+#if (TIMER_COUNT_TOP < 256)
+#define TIMER_CONFIG_NORMAL() ({ \
+  TCCR0A = _BV(WGM01); \
+  TCCR0B = _BV(CS00); \
+  OCR0A = TIMER_COUNT_TOP; \
+  TCNT0 = 0; \
+})
+#else
+#define TIMER_CONFIG_NORMAL() ({ \
+  TCCR0A = _BV(WGM01); \
+  TCCR0B = _BV(CS01); \
+  OCR0A = TIMER_COUNT_TOP / 8; \
+  TCNT0 = 0; \
+})
+#endif
 
+#define TIMER_PWM_PIN        1  /* ATtiny85 */
 
 //---------------------------------------------------------
 // Unknown Timer
diff --git a/examples/IRsendDemo/IRsendDemo.ino b/examples/IRsendDemo/IRsendDemo.ino
index a21af31..e3772ed 100644
--- a/examples/IRsendDemo/IRsendDemo.ino
+++ b/examples/IRsendDemo/IRsendDemo.ino
@@ -12,14 +12,11 @@ IRsend irsend;
 
 void setup()
 {
-  Serial.begin(9600);
 }
 
 void loop() {
-  if (Serial.read() != -1) {
     for (int i = 0; i < 3; i++) {
       irsend.sendSony(0xa90, 12); // Sony TV power code
       delay(40);
     }
-  }
 }