Avr-gcc
From Attie's Wiki
(Difference between revisions)
| Line 128: | Line 128: | ||
<h2>icsp pins</h2> | <h2>icsp pins</h2> | ||
| − | connecting to bus pirate | + | [[File:http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg]] |
| + | |||
| + | <h3>connecting to bus pirate</h3> | ||
{| | {| | ||
|- | |- | ||
| − | | align="right" | brown - 1 ||bgcolor="rgb(157,98,66)" width="10px" | || width="10px" | ||bgcolor="rgb( | + | | align="right" | brown - 1 ||bgcolor="rgb(157,98,66)" width="10px" | || width="10px" | ||bgcolor="rgb(255,255,255)" style="border:solid 1px #000;" width="10px" | || 2 - white |
|- | |- | ||
| align="right" | yellow - 3 ||bgcolor="rgb(255,250,47)" | || ||bgcolor="rgb(254,156,24)" | || 4 - orange | | align="right" | yellow - 3 ||bgcolor="rgb(255,250,47)" | || ||bgcolor="rgb(254,156,24)" | || 4 - orange | ||
| Line 137: | Line 139: | ||
| align="right" | red - 5 ||bgcolor="rgb(255,13,13)" | || ||bgcolor="rgb(0,0,0)" | || 6 - black | | align="right" | red - 5 ||bgcolor="rgb(255,13,13)" | || ||bgcolor="rgb(0,0,0)" | || 6 - black | ||
|} | |} | ||
| + | pin 2 can use the gray wire for 5v | ||
<h2>other commands</h2> | <h2>other commands</h2> | ||
Revision as of 10:35, 25 March 2010
How to setup avr-gcc and get compiling for an Arduino!
$ yum install avr-gcc avr-libc avr-binutils avrdude
Contents |
avrdude
For ATMega168:
$ avrdude -c buspirate -P /dev/ttyUSB1 -x speed=3 -p m168
For ATMega328p:
$ avrdude -c buspirate -P /dev/ttyUSB1 -x speed=3 -p m328p
Terminal mode: -t. Use command part to see detailed part information.
To upload file: -U memtype:op:filename[:format]
makefile
simple
Just produces the .elf and .hex file. Also optimizes for space (HUGE difference)
all:
avr-gcc avr.c -mmcu=atmega168 -o example.elf -Wall -Os
avr-objcopy -j .text -O ihex example.elf example.hex
avrdude -c buspirate -P /dev/ttyUSB1 -x speed=3 -p m168 -U flash:w:example.hex
complex
produces .o, .asm, .map and .lst files too
all:
avr-gcc -g -mmcu=atmega168 -c avr.c -Wa,-alh,-L -o avr.o > avr.asm
avr-gcc -g -mmcu=atmega168 -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 -x speed=3 -p m168 -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); } }
icsp pins
File:Http://itp.nyu.edu/physcomp/uploads/6pinAVRproghead.jpg
connecting to bus pirate
| brown - 1 | 2 - white | |||
| yellow - 3 | 4 - orange | |||
| red - 5 | 6 - black |
pin 2 can use the gray wire for 5v
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
