How to Program STM32 Using Arduino IDE: Step-by-Step Guide

To program an STM32 microcontroller using the Arduino IDE, first install the STM32 board support via the Board Manager by adding the STM32 URL in Preferences. Then select your STM32 board from the Boards menu, connect it via USB, and upload your Arduino sketches as usual.

Syntax

Programming STM32 with Arduino IDE uses the same sketch structure as any Arduino board. The main parts are:

• setup(): Runs once to initialize settings.
• loop(): Runs repeatedly to perform tasks.
• Board selection and upload are done via the Arduino IDE menus.

arduino

void setup() {
  // Initialize pins, serial, etc.
}

void loop() {
  // Main code runs here repeatedly
}

Example

This example blinks the built-in LED on an STM32 board using Arduino IDE. It shows basic pin control.

arduino

void setup() {
  pinMode(LED_BUILTIN, OUTPUT); // Set LED pin as output
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH); // Turn LED on
  delay(500);                      // Wait 500 ms
  digitalWrite(LED_BUILTIN, LOW);  // Turn LED off
  delay(500);                      // Wait 500 ms
}

Output

The built-in LED blinks on and off every 500 milliseconds.

Common Pitfalls

Common mistakes when programming STM32 with Arduino IDE include:

• Not installing the STM32 board package via Board Manager.
• Forgetting to select the correct STM32 board and port before uploading.
• Using the wrong USB mode or missing drivers for the STM32 device.
• Trying to upload without pressing the BOOT0 button if required by your board.

Always check your board's documentation for specific upload instructions.

arduino

/* Wrong: Trying to upload without selecting STM32 board */
// Arduino IDE defaults to Arduino Uno, upload will fail.

/* Right: Select STM32 board from Tools > Board menu before uploading */

Quick Reference

Steps to program STM32 using Arduino IDE:

• Open Arduino IDE and go to File > Preferences.
• Add https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json to "Additional Board Manager URLs".
• Go to Tools > Board > Boards Manager, search for "STM32", and install the STM32 MCU package.
• Select your STM32 board under Tools > Board.
• Connect your STM32 board via USB.
• Write or open your Arduino sketch.
• Click Upload to program the board.

Key Takeaways

Install STM32 board support via Arduino IDE Board Manager before programming.

Always select the correct STM32 board and port in the Arduino IDE.

Use the standard Arduino sketch structure with setup() and loop() functions.

Check your STM32 board's upload method; some require pressing BOOT0 or special drivers.

Test with simple examples like blinking the built-in LED to confirm setup.