Scientific RPN Calculator (with ATTINY85)

[Paul Dale]

Drop the memmove, the union does this for you.

You might get away this this ugly:

Code:

byte n = sizeof(double); 
while (n--) EEPROM.write(addr++, ((byte *)&x)[n - 1]);

This should be equivalent:

Code:

byte n = sizeof(double); 
while (n) EEPROM.write(addr++, ((byte *)&x)[--n]);

Although, personally I'd do:

Code:

for (byte n=0; n<sizeof(double); n++) EEPROM.write(addr++, ((byte *)&x)[n]);

or even:

Code:


byte *p = (byte *)&x;
for (byte n=0; n<sizeof(double); n++) EEPROM.write(addr++, *p++);

A reasonable compiler would treat them all the same but not every compiler is reasonable.


Pauli