Topic

C++ programming

Short insights that take you from your first main() to classes, with what changes on a microcontroller (MCU) and on a microprocessor (MPU) called out as you go. Each one is a 2–3 minute read with a diagram, code that compiles, and the output it prints.

Read the first insight

main.cppC++

void poll_sensors();int main() {    while (true) {        poll_sensors();    }}

Insights

From source to binary

How your .cpp file becomes firmware on a chip.

3 min read
Types and operators

Why uint8_t beats int when every byte counts.

2 min read
i++, ++i and compound assignment

The shorthand behind every register bit-flip.

2 min read
if/else and switch

Decisions, and the switch-based state machine.

2 min read
Loops

while, do-while, for, and the super-loop that never ends.

3 min read
Functions

By value or by reference, and when to inline.

2 min read
Arrays and strings

Fixed buffers with no heap in sight.

2 min read
Pointers and references

Addresses, and the pointer that talks to hardware.

3 min read
Classes and objects

An Led class that sets up its own pin.

3 min read
public, private, protected

Hiding registers behind a safe interface.

2 min read
Inheritance

One Sensor interface, many sensors, and what virtual costs.

2 min read