are header data stored to flash?

Projects Programming
1

hi,
when a data array is defined and initialized within a header file, will those data automatically be stored within flash memory, or is it necessary to define the data as PROGMEM?

SupArdu

2

will those data automatically be stored within flash memory

Yes.

or is it necessary to define the data as PROGMEM?

Using the PROGMEM attribute keeps the compiler from copying the data from flash to SRAM at run time.