Avr-gcc
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How to setup avr-gcc and get compiling for an Arduino! | How to setup avr-gcc and get compiling for an Arduino! | ||
| − | + | <pre> | |
$ yum install avr-gcc avr-libc avr-binutils avrdude | $ yum install avr-gcc avr-libc avr-binutils avrdude | ||
| − | + | </pre> | |
See: using the [[Arduino IDE]] | See: using the [[Arduino IDE]] | ||
| − | + | <h2>avrdude</h2> | |
use [[avrdude]] to load files into the arduino | use [[avrdude]] to load files into the arduino | ||
| − | + | <h2>makefile</h2> | |
| − | + | <h3>devices</h3> | |
| − | * | + | * <code>atmega168</code> |
| − | * | + | * <code>atmega328p</code> |
| − | + | <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) | ||
| − | + | <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 | ||
| − | + | </pre> | |
| − | + | <h3>complex</h3> | |
produces .o, .asm, .map and .lst files too | produces .o, .asm, .map and .lst files too | ||
| − | + | <pre> | |
all: | all: | ||
| − | avr-gcc -g -mmcu=atmega328p -c avr.c -Wa,-alh,-L -o example.o | + | 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 | ||
| − | avr-objdump -h -S example.elf | + | 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 | ||
| − | + | </pre> | |
| − | + | <h2>sample source</h2> | |
| − | + | <h3>blink</h3> | |
| − | + | <source lang="c"> | |
/* 8 Mhz cpu */ | /* 8 Mhz cpu */ | ||
#define F_CPU 8000000UL | #define F_CPU 8000000UL | ||
| Line 46: | Line 47: | ||
#define LED 0b00100000 | #define LED 0b00100000 | ||
| − | #include | + | #include <util/delay.h> |
| − | #include | + | #include <avr/io.h> |
int main(void) { | int main(void) { | ||
| Line 56: | Line 57: | ||
/* turn led off */ | /* turn led off */ | ||
| − | PORTB &= ~LED; | + | PORTB &= ~LED; |
_delay_ms(450); | _delay_ms(450); | ||
| Line 64: | Line 65: | ||
} | } | ||
} | } | ||
| − | + | </source> | |
| − | + | <h3>S.O.S.</h3> | |
| − | + | <source lang="c"> | |
/* 8 Mhz cpu */ | /* 8 Mhz cpu */ | ||
#define F_CPU 8000000UL | #define F_CPU 8000000UL | ||
| Line 74: | Line 75: | ||
#define LED 0b00100000 | #define LED 0b00100000 | ||
| − | #include | + | #include <util/delay.h> |
| − | #include | + | #include <avr/io.h> |
void dot(void) { | void dot(void) { | ||
| Line 83: | Line 84: | ||
/* turn led off */ | /* turn led off */ | ||
| − | PORTB &= ~LED; | + | PORTB &= ~LED; |
_delay_ms(500); | _delay_ms(500); | ||
} | } | ||
| Line 93: | Line 94: | ||
/* turn led off */ | /* turn led off */ | ||
| − | PORTB &= ~LED; | + | PORTB &= ~LED; |
_delay_ms(500); | _delay_ms(500); | ||
} | } | ||
| Line 105: | Line 106: | ||
while(1) { | while(1) { | ||
| − | for (i=0;i | + | for (i=0;i<3;i++) { |
dot(); | dot(); | ||
} | } | ||
| − | for (i=0;i | + | for (i=0;i<3;i++) { |
dash(); | dash(); | ||
} | } | ||
| − | for (i=0;i | + | for (i=0;i<3;i++) { |
dot(); | dot(); | ||
} | } | ||
| Line 119: | Line 120: | ||
} | } | ||
} | } | ||
| − | + | </source> | |
| − | + | <h2>other commands</h2> | |
| − | + | <pre> | |
avr-size example.elf | avr-size example.elf | ||
avr-gcc --help=optimizers | avr-gcc --help=optimizers | ||
| − | + | </pre> | |
| − | + | <h2>resources</h2> | |
| − | https://www.mainframe.cx/~ckuethe/avr-c-tutorial/ | + | https://www.mainframe.cx/~ckuethe/avr-c-tutorial/<br> |
| − | http://arduino.cc/en/Hacking/PinMapping168 | + | http://arduino.cc/en/Hacking/PinMapping168<br> |
| − | http://hintshop.ludvig.co.nz/show/buspirate-avr-programming/ | + | http://hintshop.ludvig.co.nz/show/buspirate-avr-programming/<br> |
| − | http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg | + | http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg<br> |
| − | http://dangerousprototypes.com/bus-pirate-manual/ | + | http://dangerousprototypes.com/bus-pirate-manual/<br> |
http://www.ladyada.net/library/arduino/bootloader.html | http://www.ladyada.net/library/arduino/bootloader.html | ||
Revision as of 01:26, 24 November 2010
How to setup avr-gcc and get compiling for an Arduino!
<pre> $ yum install avr-gcc avr-libc avr-binutils avrdude </pre>
See: using the Arduino IDE
<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> Just produces the .elf and .hex file. Also optimizes for space (HUGE difference) <pre> 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
</pre>
<h3>complex</h3> produces .o, .asm, .map and .lst files too <pre> 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
</pre>
<h2>sample source</h2>
<h3>blink</h3> <source lang="c"> /* 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); }
} </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>
<pre> avr-size example.elf avr-gcc --help=optimizers </pre>
<h2>resources</h2> https://www.mainframe.cx/~ckuethe/avr-c-tutorial/<br> http://arduino.cc/en/Hacking/PinMapping168<br> http://hintshop.ludvig.co.nz/show/buspirate-avr-programming/<br> http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg<br> http://dangerousprototypes.com/bus-pirate-manual/<br> http://www.ladyada.net/library/arduino/bootloader.html
