Minimal ATMega8515L STK500 USB-Serial Adapter OSX deployment

deploy-8515.sh

#!/bin/bash

set -e

if (( $# != 1 ))
then
	echo "Usage: $0 <file.c>"
	exit 1
fi

FILE_PATH=$(realpath $1)
DIR=$(dirname $FILE_PATH)
FILE=$(basename $FILE_PATH)

if [[ ! -s $FILE ]]
then
	echo "$1 is empty or does not exist"
	exit 1
fi

if [[ ! $FILE =~ .\.c$ ]]
then
	echo "$1 is not a .c file"
	exit 2
fi

BASE=${FILE%.c}

cd "$DIR"

echo "Compiling $FILE"
avr-gcc -g -Os -mmcu=atmega8515 -c $FILE
avr-gcc -g -mmcu=atmega8515 -o $BASE.elf $BASE.o

echo "Converting object to hex"
avr-objcopy -j .text -j .data -O ihex $BASE.elf $BASE.hex

echo "Flashing AVR"
avrdude -p m8515 -c stk500 -v -U flash:w:$BASE.hex -P /dev/cu.usbserial-142440

echo "Done"

led.c

#ifndef F_CPU
#define F_CPU 8000000L // or whatever may be your frequency
#endif

#include <avr/io.h>
#include <util/delay.h>                // for _delay_ms()

int main(void)
{
    DDRB = 0x01;                       // initialize port C
    while(1)
    {
        // LED on
        PORTB = 0b00000001;            // PB0 = High = Vcc
        _delay_ms(500);                // wait 500 milliseconds

        //LED off
        PORTB = 0b00000000;            // PB0 = Low = 0v
        _delay_ms(500);                // wait 500 milliseconds
    }
}

setup.txt

Install avrdude and the AVR toolchain from https://github.com/osx-cross/homebrew-avr

```
brew install avrdude
brew tap osx-cross/avr
brew install avr-gcc
```