3.1 C++

Writing C++ code to run on the Pico.

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Instructions

Look at c-plus-plus.cpp to see examples of how to use C++ in microcontroller code.

Since our toolchain is based on GCC, and the SDK is written in C, we get C++ support for free due to backwards compatibility. That means you can use many of the features of C++ for embedded programming on a Pico.

Object-oriented programming in C++ is useful for embedded development, since we can create C++ objects that represent the various components and peripherals connected to our Pico.

Exercises

Exercise

Create a C++ class to represent an LED.

Class template:

class LED {
public:
	// Setup the pin as an output.
	LED(uint gpio);
 
	// Turn the LED on or off.
	void set_state(bool state);
};

Exercise

Create a C++ class to represent a button input.

Class template:

class Button {
public:
	// Set pin as input and configure pullup/pulldown
	Button(uint gpio);
	
	// Return whether the button is pressed or not.
	bool is_pressed();
};