Burning sketches to the Arduino board with an external programmer. This allows you to use the full program space (flash) of the chip on the Arduino board. So with an ATmega168, you'll get 16 KB instead of 14 (on an ATmega8 you'll get 8 KB instead of 7). It also avoids the bootloader delay when you power or reset your board.

Since we will be using the Arduino Uno as an ISP programmer, we first have to upload a sketch that will be responsible for receiving data through the serial port (USART) and outputting it correctly to the target microcontroller through their SPI ports. So, open up the Arduino IDE, go to File>Examples>ArduinoISP. Once the sketch is open, on the top of the file, some comments are made on pin names and connections. Those will be addressed on the next step, but make sure they match with the tutorial. Connect your arduino and fire the Upload button away. It takes a little more tha usual but don't worry.

For this first step you will need the following materials: • Jumper wires of saveral colors (yes they matter);• 01 RED LED• 01 YELLOW LED• 02 LEDs of different colors, your choice (we are using blue and white)• 01 10uF electrolytic capacitor• 04 200 ohm 1/8W resistors These other materials are project-dependent. In our case, we are going for a solution that uses a 8 MHz crystal and an internal clock with the same value.

Therefore: • 01 8 MHz crystal• 02 20 pF ceramic capacitors Hook all the components together according to the picture. Do notice that for each trail that receives one of the lead of the crystal, there is a ceramic capacitor connecting this trail to the ground trail.

The LEDs' anodes are identified by the slight curve their leads have. Pay attention to the white LED, the one to be blinked by the code that will be loaded. Due to a software limitation, that doesn't allow component flipping, the LED ended up being crossed. The electrolytic capacitor is polarized, therefore make sure you have the longer lead connected to RESET while the smaller one is connected to GND.

This will filter out the automatic reset signal, disabling it. A good advice is to keep the jumper wires in the same color code as the one shown in the picture.

This helps further hardware debugging. Since you have used the Arduino IDE to load the ArduinoISP sketch to your Arduino board, this means that you already have AVRDUDE installed in your computer.

AVRDUDE is a command line application that intermediates the firmware loading process on your computer side. Long story short, AVRDUDE reads the.hex file produced by the compilation and translation process and queues it in order to output it correctly through the serial port. From there the USB-serial converter on your Uno board (the black square next to the USB port) reads it from the USB line, sends it to the ATMEGA on the Arduino Uno board and finally outputs it through SPI to the target microcontroller. One of the coolest features of Atmel Studio is the support to external tools, like the AVRDUDE itself.

Basically, Atmel Studio leaves this open enough to customization, that with the press of a button, you can perform a full command line program call and deploy your firmware to the target microcontroller. Enough said, Open Atmel Studio 6. Go to Tools>External Tools Fill in the fields as the picture shows. The Command field is to be filled with the location avrdude in your machine, in my case: C: Program Files (x86) Arduino hardware tools avr bin avrdude.exe As to the Arguments field, fill in with the following line: -U lfuse:w:0xe6:m -U hfuse:w:0xd9:m -e -v -patmega328p -carduino -PCOM2 -b19200 -D -Uflash:w:'$(ProjectDir)Debug $(ItemFileName).hex':i -C'C: Program Files (x86) Arduino hardware tools avr etc avrdude.conf' Those are the firmware deployment arguments or information to be interpreted by AVRDUDE and converted into write actions. In this line there are three main things to be altered: • The COM port you are using your Arduino Uno on. In order to check, go to Device Manager>COM&LPT Ports and you should see Arduino listed. • The file path where to find avrdude.conf.

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