Questions tagged [c-preprocessor]
the macro preprocessor for the C and C++ computer programming languages.
2
votes
1answer
49 views
Syntax of binary Constants
I was trying to compile some Arduino code on the PC for testing when I noticed some strange syntax for numerical binary constants.
Convetion seems to be to declare them like so:
static const ...
5
votes
2answers
810 views
Detect if Serial1 and Serial2 are defined, at compile time
I have my library that uses Serial, Serial1 and Serial2 to establish various logging scenarios. Library user would define the config at class constructor, using simple byte constants like 0, 1 and 2.
...
0
votes
2answers
53 views
Preprocessing problem
I've a little problem, I'm trying to create a library with processor variables for tune it.
So in .ino I declared my preprocessor var, but preprocessor variables appear not defined in my library. (...
8
votes
3answers
6k views
List of Arduino board preprocessor #defines
When one selects a board within Arduino IDE, a preprocessor definition is added to one of the behind-the-scenes files.
After a lot of hunting and some good fortune I found that the format of this ...
23
votes
4answers
3k views
Why use an int variable for a pin when const int, enum or #define makes much more sense
Why do people use a variable to specify a pin number when the pin is unlikely to change throughout the execution of the code?
Many times I see an int being used for a pin definition,
int led = 13;
...
