What layer do the utilities work with - the hardware layer or the driver layer?

Question

Arduino

What layer do programs work with that provide information and control over the hardware layer (fans, temperature, defragmentation, etc.)? Do they work directly with the hardware or with drivers that work with the hardware?

Answer 1

This is not a library. This enable is required in order to place data in the flash memory of microcontroller programs.
For example like this

#include <avr/pgmspace.h>
const prog_char isrDebug[] = { "\r\nISR debug " };
extern const prog_char isrDebug[] PROGMEM;

Answer 2

Here in the archive:
download.savannah.gnu.org/releases/avr-libc/avr-li...
in include/avr/pgmspace.h is it?

Answer 3

With drivers. The devices you specified in the personal computer send metrics to the chipset, from which they become available to programs through the driver.