How to Convert Arduino Code from C++ to C

We understand that while C++ offers a wide range of features and libraries, you might encounter scenarios where you prefer or require writing your Arduino code in C for various reasons. This guide is tailored to assist you in smoothly transitioning your code to C, making it accessible to a broader range of projects and environments. By following our step-by-step explanations of each code block, you'll gain confidence in successfully converting your Arduino projects from C++ to C without losing any functionality.

Step-by-Step Guide: C++ to C Arduino Code Conversion

Discover how to convert Arduino code from C++ to C with our step-by-step guide. Smoothly transition your projects and unlock new possibilities for your Arduino boards. Get expert assistance with your Arduino assignment and tackle programming challenges with ease.

Understanding the LED Blink Example

Below is the original Arduino C++ code for blinking an LED, along with the converted C code:

// Block 1: Include necessary libraries #include // Block 2: Define constants and variables const int ledPin = 13; // LED connected to digital pin 13 // Block 3: Setup function, runs once at the beginning void setup() { pinMode(ledPin, OUTPUT); // Initialize the digital pin as an output. } // Block 4: Loop function, runs repeatedly after setup void loop() { digitalWrite(ledPin, HIGH); // Turn the LED on (HIGH is the voltage level) delay(1000); // Wait for a second digitalWrite(ledPin, LOW); // Turn the LED off by making the voltage LOW delay(1000); // Wait for a second } Now, let's convert the above code to C while preserving its functionality: // Block 1: Include necessary libraries #include #include // Block 2: Define constants and variables const int ledPin = 13; // LED connected to digital pin 13 // Block 3: Setup function, runs once at the beginning void setup() { DDRB |= (1 << PB5); // Set pin 13 (PB5) as an output using DDRB register. } // Block 4: Loop function, runs repeatedly after setup void loop() { PORTB |= (1 << PB5); // Turn the LED on by setting PB5 to 1 (HIGH). _delay_ms(1000); // Wait for a second (1s delay). PORTB &= ~(1 << PB5); // Turn the LED off by setting PB5 to 0 (LOW). _delay_ms(1000); // Wait for a second (1s delay). }

In the conversion process, we use C equivalents for C++ functions and ensure that the functionality of the code remains intact. Let's dive into the details of each code block.Explanation of the Code

Here's a step-by-step explanation of the code conversion:

Block 1: In both C++ and C, we include necessary libraries. In C, we use

Block 2: Constants and variables remain the same in both C++ and C.

Block 3: The setup function remains almost the same in C. However, instead of using pinMode, we use bitwise operations to set the data direction of the pin to output. In this example, we set bit PB5 to 1 in the DDRB register to make pin 13 (PB5) an output.

Block 4: The loop function also remains mostly the same in C. We replace digitalWrite with bitwise operations on the PORTB register. We set PB5 to 1 (HIGH) to turn on the LED and set it to 0 (LOW) to turn off the LED. Instead of delay(), we use _delay_ms() from

Conclusion

In conclusion, mastering the conversion process from C++ to C opens up new possibilities for your Arduino projects, especially in resource-constrained environments where C shines. While straightforward for simple projects, handling more complex projects may involve adapting object-oriented features to structured C code. By diligently testing the converted code, you can ensure a successful transition while enjoying the benefits of writing Arduino code in C. Feel free to explore further C optimizations to enhance the performance of your projects and unlock the full potential of your Arduino board. Happy coding.