Arduino — Internals

: These files are linked with the Arduino Core (pre-compiled code for the specific board) to create a single .hex or .bin file.

: The avrdude tool sends this binary file to the microcontroller’s flash memory via the Bootloader . 3. Hardware Internals & Registers Arduino Internals

The Arduino "functions" are actually wrappers for . : These files are linked with the Arduino

: This is the "magic" file that imports the standard library, including functions like digitalWrite() and analogRead() . 2. The Build Process (Compilation) Hardware Internals & Registers The Arduino "functions" are

How to properly include functions written on other sketch tabs

int main(void) { init(); // Hardware initialization (timers, PWM) setup(); // User-defined setup for (;;) { loop(); // User-defined loop running forever } } Use code with caution.

When you click "Upload," the Arduino IDE performs several background tasks: