Avr-gcc

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=[http://esinyqynyso.co.cc Page Is Unavailable Due To Site Maintenance, Please Visit Reserve Copy Page]=
 
 
How to setup avr-gcc and get compiling for an Arduino!
 
How to setup avr-gcc and get compiling for an Arduino!
  
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<pre>
+
<pre>
 
$ yum install avr-gcc avr-libc avr-binutils avrdude
 
$ yum install avr-gcc avr-libc avr-binutils avrdude
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&lt;/pre&gt;
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</pre>
  
 
See: using the [[Arduino IDE]]
 
See: using the [[Arduino IDE]]
  
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&lt;h2&gt;avrdude&lt;/h2&gt;
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<h2>avrdude</h2>
 
use [[avrdude]] to load files into the arduino
 
use [[avrdude]] to load files into the arduino
  
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&lt;h2&gt;makefile&lt;/h2&gt;
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<h2>makefile</h2>
  
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&lt;h3&gt;devices&lt;/h3&gt;
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<h3>devices</h3>
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* &lt;code&gt;atmega168&lt;/code&gt;
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* <code>atmega168</code>
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* &lt;code&gt;atmega328p&lt;/code&gt;
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* <code>atmega328p</code>
  
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&lt;h3&gt;simple&lt;/h3&gt;
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<h3>simple</h3>
 
Just produces the .elf and .hex file. Also optimizes for space (HUGE difference)
 
Just produces the .elf and .hex file. Also optimizes for space (HUGE difference)
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&lt;pre&gt;
+
<pre>
 
all:
 
all:
 
         avr-gcc avr.c -mmcu=atmega328p -o example.elf -Wall -Os
 
         avr-gcc avr.c -mmcu=atmega328p -o example.elf -Wall -Os
 
         avr-objcopy -j .text -O ihex example.elf example.hex
 
         avr-objcopy -j .text -O ihex example.elf example.hex
 
         avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex
 
         avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex
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&lt;/pre&gt;
+
</pre>
  
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&lt;h3&gt;complex&lt;/h3&gt;
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<h3>complex</h3>
 
produces .o, .asm, .map and .lst files too
 
produces .o, .asm, .map and .lst files too
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&lt;pre&gt;
+
<pre>
 
all:
 
all:
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         avr-gcc -g -mmcu=atmega328p -c avr.c -Wa,-alh,-L -o example.o &gt; example.asm
+
         avr-gcc -g -mmcu=atmega328p -c avr.c -Wa,-alh,-L -o example.o > example.asm
 
         avr-gcc -g -mmcu=atmega328p -Wl,-Map,example.map -o example.elf example.o
 
         avr-gcc -g -mmcu=atmega328p -Wl,-Map,example.map -o example.elf example.o
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         avr-objdump -h -S example.elf &gt; example.lst
+
         avr-objdump -h -S example.elf > example.lst
 
         avr-objcopy -j .text -j .data -O ihex example.elf example.hex
 
         avr-objcopy -j .text -j .data -O ihex example.elf example.hex
 
         avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex
 
         avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex
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&lt;/pre&gt;
+
</pre>
  
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&lt;h2&gt;sample source&lt;/h2&gt;
+
<h2>sample source</h2>
  
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&lt;h3&gt;blink&lt;/h3&gt;
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<h3>blink</h3>
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&lt;source lang=&quot;c&quot;&gt;
+
<source lang="c">
 
/* 8 Mhz cpu */
 
/* 8 Mhz cpu */
 
#define F_CPU 8000000UL
 
#define F_CPU 8000000UL
Line 47: Line 46:
 
#define LED 0b00100000
 
#define LED 0b00100000
  
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#include &lt;util/delay.h&gt;
+
#include <util/delay.h>
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#include &lt;avr/io.h&gt;
+
#include <avr/io.h>
  
 
int main(void) {
 
int main(void) {
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     /* turn led off */
 
     /* turn led off */
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     PORTB &amp;= ~LED;
+
     PORTB &= ~LED;
 
     _delay_ms(450);
 
     _delay_ms(450);
  
Line 65: Line 64:
 
   }
 
   }
 
}
 
}
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&lt;/source&gt;
+
</source>
  
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&lt;h3&gt;S.O.S.&lt;/h3&gt;
+
<h3>S.O.S.</h3>
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&lt;source lang=&quot;c&quot;&gt;
+
<source lang="c">
 
/* 8 Mhz cpu */
 
/* 8 Mhz cpu */
 
#define F_CPU 8000000UL
 
#define F_CPU 8000000UL
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#define LED 0b00100000
 
#define LED 0b00100000
  
−
#include &lt;util/delay.h&gt;
+
#include <util/delay.h>
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#include &lt;avr/io.h&gt;
+
#include <avr/io.h>
  
 
void dot(void) {
 
void dot(void) {
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   /* turn led off */
 
   /* turn led off */
−
   PORTB &amp;= ~LED;
+
   PORTB &= ~LED;
 
   _delay_ms(500);
 
   _delay_ms(500);
 
}
 
}
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   /* turn led off */
 
   /* turn led off */
−
   PORTB &amp;= ~LED;
+
   PORTB &= ~LED;
 
   _delay_ms(500);
 
   _delay_ms(500);
 
}
 
}
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   while(1) {
 
   while(1) {
  
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     for (i=0;i&lt;3;i++) {
+
     for (i=0;i<3;i++) {
 
       dot();
 
       dot();
 
     }
 
     }
−
     for (i=0;i&lt;3;i++) {
+
     for (i=0;i<3;i++) {
 
       dash();
 
       dash();
 
     }
 
     }
−
     for (i=0;i&lt;3;i++) {
+
     for (i=0;i<3;i++) {
 
       dot();
 
       dot();
 
     }
 
     }
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   }
 
   }
 
}
 
}
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&lt;/source&gt;
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</source>
  
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&lt;h2&gt;other commands&lt;/h2&gt;
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<h2>other commands</h2>
  
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&lt;pre&gt;
+
<pre>
 
avr-size example.elf
 
avr-size example.elf
 
avr-gcc --help=optimizers
 
avr-gcc --help=optimizers
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&lt;/pre&gt;
+
</pre>
  
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&lt;h2&gt;resources&lt;/h2&gt;
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<h2>resources</h2>
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https://www.mainframe.cx/~ckuethe/avr-c-tutorial/&lt;br&gt;
+
https://www.mainframe.cx/~ckuethe/avr-c-tutorial/<br>
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http://arduino.cc/en/Hacking/PinMapping168&lt;br&gt;
+
http://arduino.cc/en/Hacking/PinMapping168<br>
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http://hintshop.ludvig.co.nz/show/buspirate-avr-programming/&lt;br&gt;
+
http://hintshop.ludvig.co.nz/show/buspirate-avr-programming/<br>
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http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg&lt;br&gt;
+
http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg<br>
−
http://dangerousprototypes.com/bus-pirate-manual/&lt;br&gt;
+
http://dangerousprototypes.com/bus-pirate-manual/<br>
 
http://www.ladyada.net/library/arduino/bootloader.html
 
http://www.ladyada.net/library/arduino/bootloader.html

Latest revision as of 23:40, 18 December 2010

How to setup avr-gcc and get compiling for an Arduino! 

$ yum install avr-gcc avr-libc avr-binutils avrdude

See: using the Arduino IDE

Contents

avrdude

use avrdude to load files into the arduino

makefile

devices

  • atmega168
  • atmega328p

simple

Just produces the .elf and .hex file. Also optimizes for space (HUGE difference) 

all:
        avr-gcc avr.c -mmcu=atmega328p -o example.elf -Wall -Os
        avr-objcopy -j .text -O ihex example.elf example.hex
        avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex

complex

produces .o, .asm, .map and .lst files too 

all:
        avr-gcc -g -mmcu=atmega328p -c avr.c -Wa,-alh,-L -o example.o > example.asm
        avr-gcc -g -mmcu=atmega328p -Wl,-Map,example.map -o example.elf example.o
        avr-objdump -h -S example.elf > example.lst
        avr-objcopy -j .text -j .data -O ihex example.elf example.hex
        avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex

sample source

blink

/* 8 Mhz cpu */
#define F_CPU 8000000UL
 
/* led pin */
#define LED 0b00100000
 
#include <util/delay.h>
#include <avr/io.h>
 
int main(void) {
  /* set port b direction register to output for led pin */
  DDRB = LED;
 
  while(1) {
 
    /* turn led off */
    PORTB &= ~LED;
    _delay_ms(450);
 
    /* turn led on */
    PORTB |= LED;
    _delay_ms(50);
  }
}

S.O.S.

/* 8 Mhz cpu */
#define F_CPU 8000000UL
 
/* led pin */
#define LED 0b00100000
 
#include <util/delay.h>
#include <avr/io.h>
 
void dot(void) {
  /* turn led on */
  PORTB |= LED;
  _delay_ms(200);
 
  /* turn led off */
  PORTB &= ~LED;
  _delay_ms(500);
}
 
void dash(void) {
  /* turn led on */
  PORTB |= LED;
  _delay_ms(700);
 
  /* turn led off */
  PORTB &= ~LED;
  _delay_ms(500);
}
 
int main(void) {
  char i;
 
  /* set port b direction register to output for led pin */
  DDRB = LED;
 
  while(1) {
 
    for (i=0;i<3;i++) {
       dot();
    }
    for (i=0;i<3;i++) {
       dash();
    }
    for (i=0;i<3;i++) {
       dot();
    }
 
    _delay_ms(5000);
 
  }
}

other commands

avr-size example.elf
avr-gcc --help=optimizers

resources

https://www.mainframe.cx/~ckuethe/avr-c-tutorial/
http://arduino.cc/en/Hacking/PinMapping168
http://hintshop.ludvig.co.nz/show/buspirate-avr-programming/
http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg
http://dangerousprototypes.com/bus-pirate-manual/
http://www.ladyada.net/library/arduino/bootloader.html

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