RAM/Flash Usage in Embedded C Programs

 

Read-only memory(Flash)

Data Section

int data_variable = 500;

Read-only date

constant

const int read_only_variable = 2000;

Text(code)

“literal pool” may in the function.

void my_function(void){
     int x;
     x = 200;
     printf("X is %d\n", x);
}

Read-Write Data(RAM)

Data section

int data_var = 500; //require flash memory to stored.

BSS section

int bss_var0;
int bss_var1 = 0;

//doesn’t need require flash memory to stored.

Heap section

static int static_var;

buffer = malloc(512);

Stack section

int my_function(int a, int b, int c, int d)

Reference

[1] http://coactionos.com/embedded%20design%20tips/2013/10/18/Tips-RAM-Flash-Usage-in-Embedded-C-Programs/