attiny13 programming, i am completely new to this

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1

So i was going through the embedded electronics tutorial and i was wondering how to change the code in the tutorial 2 to work for an attiny13

here is the source:

/*
    5-10-07
    Copyright Spark Fun Electronics© 2007
    Nathan Seidle
    nathan at sparkfun.com
    
    Example Blink
	Toggles all IO pins at 1Hz
*/

#include <avr/io.h>

//Define functions
//======================
void ioinit(void);      //Initializes IO
void delay_ms(uint16_t x); //General purpose delay
//======================

int main (void)
{
    ioinit(); //Setup IO pins and defaults

    while(1)
    {
		PORTC = 0xFF;
		PORTB = 0xFF;
		PORTD = 0xFF;
		delay_ms(500);

		PORTC = 0x00;
		PORTB = 0x00;
		PORTD = 0x00;
		delay_ms(500);
    }
   
    return(0);
}

void ioinit (void)
{
    //1 = output, 0 = input
    DDRB = 0b11111111; //All outputs
    DDRC = 0b11111111; //All outputs
    DDRD = 0b11111110; //PORTD (RX on PD0)
}

//General short delays
void delay_ms(uint16_t x)
{
  uint8_t y, z;
  for ( ; x > 0 ; x--){
    for ( y = 0 ; y < 90 ; y++){
      for ( z = 0 ; z < 6 ; z++){
        asm volatile ("nop");
      }
    }
  }
}

thanks

2

Go through the ATtiny13 data sheet carefully, you should see what changes you have to make quite easily.

Leon