32 lines
1.1 KiB
Markdown
32 lines
1.1 KiB
Markdown
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#ATmega 328p / Arduino over SPI
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###Did you know that your Pi could power and program an ATmega 328p/Arduino directly, with nothing but a few wires, a breadboard, a 16Mhz crystal oscillator and some 22pF capacitors?
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Read my [complete Pico PiDuino tutorial](http://pi.gadgetoid.com/article/building-the-pico-piduino) to get started for just over £5
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You'll need to install [Gordon's modified AVRDude](https://projects.drogon.net/raspberry-pi/gertboard/arduino-ide-installation-isp/).
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Connect 8/CEO to your ATmega's Reset/RST pin, 9/MISO to its MISO pin (D12), 10 to its MOSI pin (D11) and 11/SCLK to its SCLK pin (D13).
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Power your ATmega with the 3.3v and GND pins from your Pi, and you're good to go.
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Make sure you have no rogue SPI device drivers running and check it's connected correctly using:
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```bash
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avrdude -p m328p -c gpio
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```
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To get started compiling Arduino sketches from the command line:
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```bash
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sudo apt-get install arduino arduino-mk
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```
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This basic Makefile should get you started. Create a basic sketch, name it mysketch.ino and run:
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```bash
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export BOARD=atmega328
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make
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avrdude -p m328p -c gpio -e -U flash:w:build-cli/Arduino.hex
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```
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