Just a newby asking the 64k question again - Arduino Mega2560

Using Arduino Programming Questions
17

So how can this 'solution' be implemented in context of writing and uploading sketches in the Arduino IDE?

Lefty

Copy 'n' paste.

You cannot address huge variables even in the < 64k boundary.
Here is a program using every single byte on the mega using progmem, it is possible, and GET_FAR_ADDRESS will help you read the data.

#define nothing

template< uint64_t C, typename T >
  struct LargeStruct{
    T Data;
    LargeStruct< C - 1, T > Next;
};
template< typename T > struct LargeStruct< 0, T >{ };

typedef LargeStruct< 80, uint64_t > Container; //640 bytes

PROGMEM LargeStruct< 50, Container > l_Struct;  //32k
PROGMEM LargeStruct< 50, Container > l_Struct1;   //32k
PROGMEM LargeStruct< 50, Container > l_Struct2;   //32k
PROGMEM LargeStruct< 50, Container > l_Struct3;   //32k
PROGMEM LargeStruct< 50, Container > l_Struct4;   //32k
PROGMEM LargeStruct< 50, Container > l_Struct5;  //32k
PROGMEM LargeStruct< 50, Container > l_Struct6;   //32k
PROGMEM LargeStruct< 50, Container > l_Struct7;   //32k

PROGMEM LargeStruct< 431, uint16_t > l_Struct8; //862 bytes
void setup()
  {
    volatile int i = ( int ) &l_Struct;
    volatile int i1 = ( int ) &l_Struct1;
    volatile int i2 = ( int ) &l_Struct2;
    volatile int i3 = ( int ) &l_Struct3;
    volatile int i4 = ( int ) &l_Struct4;
    volatile int i5 = ( int ) &l_Struct5;
    volatile int i6 = ( int ) &l_Struct6;
    volatile int i7 = ( int ) &l_Struct7;    
    volatile int i8 = ( int ) &l_Struct8;  
  }

void loop(){}