IR Remote Control using ATTiny85

Other Hardware 3rd Party Boards
1

Complete noobie here. I'm trying to make my ATTiny85 decode IR signals from a TSOP1738 and control LED's with it. The whole thing's very easy using an Arduino but I can't get it to work on the ATTiny85.
Using the tinyIRRemote library (Also tried Ken Shirriff's IRRemote).

#include <tiny_IRremote.h>
#include <tiny_IRremoteInt.h>

int RECV_PIN = 0;

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup() {
  irrecv.enableIRIn();
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
   }


void loop() 
{
  if (irrecv.decode(&results)) 
  {
    irrecv.resume();
  }

  if(results.value != 0 && results.value!= 0xFFFFFFFF)
  {
       

    if (results.value == 0xFFA25D) 
    {
       digitalWrite(4, HIGH);
      results.value = 0;
    }
    
        if (results.value == 0xFF629D) 
    {
         digitalWrite(3, HIGH);
      results.value = 0;
    }
    
        if (results.value == 0xFFE21D) 
    {
            results.value = 0;
    }
    
        if (results.value == 0xFF22DD) 
    {
           digitalWrite(2, HIGH);
      results.value = 0;
    }

    }
}

All it does is decode the IR signal based on the library, checks it with a set value, and turns a pin ON.
Nothing happens when I press the button. An LED connected to the signal of the TSOP1738 and ground flickers when I press the button. Everything else is fine too. I can find little help on Google.

2

Is it running at the speed you're compiling for? Virgin avr's come set to run at 1MHz, but you're probably compiling for 8MHz or 16MHz. On a new attiny85, do "burn bootloader" with the desired clock speed selected to set the fuses to use that clock speed.

3

DrAzzy:
Virgin avr's come set to run at 1MHz, but you're probably compiling for 8MHz or 16MHz. On a new attiny85, do "burn bootloader" with the desired clock speed selected to set the fuses to use that clock speed.

It is. I burned it the first time (and again) at 8Mhz. I recall reading the original IRRemote used commonly on the Arduino needs 16Mhz but I think the tinyir library I'm using works at 8Mhz. Just to be clear, the code itself is fine, right? Do I need to specify #define F_CPU 8000000 at the start?

4

It worked! Adding

#define F_CPU 8000000
#define __AVR_ATtiny85__

at the begining made it work, for anyone who searches this up.

Thank you for your help.