Array lenght

[joro800]

I'm trying to count array lenght in bytes through function pointer, from address of first elemet to boundary (sizeof not work for me), but boundary is 32bit aligned, and mistake is from 0 to 3 bytes. Any ideas for better solution? Tnx.

[mcumake]

Hi try this macro

#define NELEMS(x) (sizeof(x) / sizeof((x)[0]))


example :

int arra[17] ;
int n = NELEMS(arra) ;