Skip to main content

Firmware Upload (Arduino IDE)

To upload the firmware for Elena CLI-OS (ATmega32), follow this guide using the Arduino IDE. Since the ATmega32 is not officially supported out-of-the-box, we'll use a custom core to make it work.

1. Clone the Repository​

Start by cloning or downloading the firmware source code:

git clone https://github.com/javierrayhan/elena_cli-os.git

Navigate to the firmware directory:

cd elena_cli-os/source code

This folder contains the source code (.ino or .c/.cpp), Makefile, and platform-specific files.

2. Install ATmega32 Core Support in Arduino IDE​

To program the ATmega32 in the Arduino IDE, install MCUdude's MegaCore core:

  1. Open Arduino IDE.

  2. Navigate to File > Preferences.

  3. In Additional Board URLs, add:

    https://mcudude.github.io/MegaCore/package_MCUdude_MegaCore_index.json

  4. Go to Tools > Board > Boards Manager.

  5. Search for MegaCore and install it.

3. Configure Board Settings​

Go to Tools and set the following:

  • Board: ATmega32
  • Microcontroller: ATmega32
  • Clock: 16 MHz external (or according to your oscillator)
  • Programmer: USBasp (or your ISP of choice)
  • Port: Select the COM port for your ISP

If you're using USBasp and encounter upload errors, try placing a 10uF capacitor between RESET and GND on your Arduino ISP (optional workaround).

4. Connect the ATmega32 to Your Programmer​

Example wiring for USBasp:

USBasp PinATmega32 Pin
MOSIPB5 (Pin 6)
MISOPB6 (Pin 7)
SCKPB7 (Pin 8)
RESETRESET (Pin 9)
VCCVCC (Pin 10)
GNDGND (Pin 11)

Double-check your connections and ensure the ATmega32 has proper power and a crystal oscillator (16MHz + 2x 22pF caps).

5. Upload the Firmware​

  1. Open the .ino or main.c file from the firmware directory.
  2. Click Upload in the Arduino IDE.
  3. If everything is wired correctly, the upload should complete successfully.

6. Post-Upload: Running the CLI OS​

Once uploaded, the ATmega32 will run a UART-based CLI OS:

  • Use Serial Monitor or terminal software like PuTTY / CoolTerm.
  • Default baud rate: 9600 bps (or according to your USART config).
  • Try commands like help, clear, ls, etc.

Resources​