using unsigned long error

Projects Programming
1

Hi
im trying to convert HEX to Decimal....

unsigned long cAll1 = strtol(BABB97AE, NULL, 16);

BUT , BABB97AE = 3132856238 what i get is 2147483647 and that is the max og "long" that is why i use unsigned that should hold 4294967295 and that is fine....

info from Arduinos own page unsigned long

2

Use strtoul() instead.

3

First,

You don't convert from dec to hex or anything else!

You represent a number in deimal/Hex so

A is the number ten when written in Hex. But we do not write it simply as A we write 0xA the 0x tell us and the compiler that we have written the number in hex.

There is no such thing as a decimal number or a hex number there is only the number. We write/represent numbers in decimal or hex or ........ formats.

Second,

Strings are always written using double quotes eg "a string"

So you should just have written

unsigned long cAll1 = 0xBABB97AE;

If you do want to use any of the strXXX functions in a case like this (and I can't see why you would) then you must use the double quotes ie "BABB97AE".

BABB97AE is just an identifier (a variable name) it is not the hex representation of a number.

Mark

4

@jremington

thx for that it worked great