Avr-gcc
From Attie's Wiki
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$ yum install avr-gcc avr-libc avr-binutils avrdude | $ yum install avr-gcc avr-libc avr-binutils avrdude | ||
</pre> | </pre> | ||
| + | |||
| + | See: using the [[Arduino IDE]] | ||
<h2>avrdude</h2> | <h2>avrdude</h2> | ||
| + | use [[avrdude]] to load files into the arduino | ||
| − | + | <h2>makefile</h2> | |
| − | < | + | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | </ | + | |
| − | + | <h3>devices</h3> | |
| − | + | * <code>atmega168</code> | |
| − | + | * <code>atmega328p</code> | |
| − | + | ||
<h3>simple</h3> | <h3>simple</h3> | ||
| Line 26: | Line 20: | ||
<pre> | <pre> | ||
all: | all: | ||
| − | avr-gcc avr.c -mmcu= | + | 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 | + | avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex |
</pre> | </pre> | ||
| Line 35: | Line 29: | ||
<pre> | <pre> | ||
all: | all: | ||
| − | avr-gcc -g -mmcu= | + | avr-gcc -g -mmcu=atmega328p -c avr.c -Wa,-alh,-L -o example.o > example.asm |
| − | avr-gcc -g -mmcu= | + | avr-gcc -g -mmcu=atmega328p -Wl,-Map,example.map -o example.elf example.o |
avr-objdump -h -S example.elf > 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 | + | avrdude -c buspirate -P /dev/ttyUSB1 -p m328p -U flash:w:example.hex |
</pre> | </pre> | ||
| Line 72: | Line 66: | ||
</source> | </source> | ||
| − | < | + | <h3>S.O.S.</h3> |
| − | + | <source lang="c"> | |
| − | + | /* 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); | ||
| + | |||
| + | } | ||
| + | } | ||
| + | </source> | ||
<h2>other commands</h2> | <h2>other commands</h2> | ||
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
