Using Atmega32 with Arduino IDE

Over time I have used all kinds of Atmel microcontrollers in various projects.

One of the most suitable was ATmega32. I have a small collection of development boards for Atmega32/16, some bought as-is, some made on stripboard.

Although the original Arduino boards offers a pleasant experience and a rapid development of the projects, when it was necessary to "extract" these projects to give them final shape I hit the well-known problem: arduino board must be "locked" in the project.

It is not only the price. Although a microcontroller in thru-hole package is significantly bigger than SMD version, it is still much smaller than an Arduino board.

And still I want to use the Arduino IDE to benefit from the collection of (very well made) (ready-to-use) libraries.

So I gathered together information useful for this purpose.

Step 1: Things you will need:

Using Atmega32 with Arduino IDE
Using Atmega32 with Arduino IDE
Using Atmega32 with Arduino IDE
Using Atmega32 with Arduino IDE
  • Atmega32 microcontroller. :)
  • Programmer (any programmer recognized by Arduino IDE). I use the USBasp programmer.
  • Minimal setup for power-up Atmega32 microcontroller (breadboard, stribpoard or a classical development board).

    We do not need all, photos above are for exemplification only.

    Step 2: Software set-up

    Using Atmega32 with Arduino IDE
    Using Atmega32 with Arduino IDE
  • Download zip file attached to this instructables.
  • Locate file boards.txt in arduino folder ...arduino-1.5.2\hardware\arduino\avr\boards.txt
  • Append information from zip archive boards.txt to original boards.txt
  • Make a folder named mega32 in ...arduino-1.5.2\hardware\arduino\avr\variants
  • Copy file pins_arduino.h from the zip into folder created at step 4.
  • Start Arduino IDE and select board.
  • Select programmer

    Later edit: I removed link to github projet where I originally found. As long as there source changed and not fit this instructable.

    Using Atmega32 with Arduino IDE
    ATmega32-Arduino-master.zip4 KB

    Step 3: Done.

    Using Atmega32 with Arduino IDE

    It's done.

    Now you can try some simple examples that are already in Arduino.

    Be very careful about correlation between ARDUINO pin and microcontroller pin.

    Here is blink example: Files->Examples->Basics->Blink

    Pin13 Arduino == Pin19 (PD5) Atmega32

    /*Blink Turns on an LED on for one second, then off for one second, repeatedly. This example code is in the public domain. */ // Pin 13 has an LED connected on most Arduino boards. // give it a name: int led = 13; // the setup routine runs once when you press reset: void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); } // the loop routine runs over and over again forever: void loop() { digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }

    After some comments I found two errors in the file pins_arduino.h

    So Iíll post here the errors and correct values.

    erroneous definition of SCL and SDA

    const static uint8_t SDA = 8; //wrong const static uint8_t SCL = 9; //wrong

    must be changed in:

    const static uint8_t SDA = 17; //correct const static uint8_t SCL = 16; //correct

    Since I am not the author of the project on github, it is subject to change beyond my control.

    So please use code attached to this instructable and make above modifications.


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