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Add a led blinking code and a build script

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This commit is contained in:
Arti Zirk 2016-09-05 19:00:01 +03:00
parent 7058070132
commit cc4321ae40
2 changed files with 22 additions and 0 deletions
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4
build.sh Normal file
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avr-gcc -Os -DF_CPU=16000000UL -Wall -Wextra -Wpedantic -Wformat -pedantic-errors -Werror -Wfatal-errors -mmcu=atmega2560 -c -o src/main.o src/main.c
avr-gcc -mmcu=atmega2560 src/main.o -o bin/atmega2560-user-code.elf
avr-objcopy -O ihex -R .eeprom bin/atmega2560-user-code.elf bin/atmega2560-user-code.ihx
avrdude -v -F -V -c stk500v2 -p m2560 -P /dev/ttyACM0 -b 115200 -U flash:w:bin/atmega2560-user-code.ihx

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src/main.c
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#include <avr/io.h>
#include <util/delay.h>
#define BLINK_DELAY_MS 1000
int main (void)
{
/* set pin 25 of PORTB for output*/
DDRA |= _BV(DDA3);
while(1) {
/* set pin 25 high to turn led on */
PORTA |= _BV(PORTA3);
_delay_ms(BLINK_DELAY_MS);
/* set pin 25 low to turn led off */
PORTA &= ~_BV(PORTA3);
_delay_ms(BLINK_DELAY_MS);
}
}