A short list of Arduino C Keywords
The following list is based upon the keywords found in the more commonly used Arduino Example Sketches.
Variable Types
· int
· float
· long
Variable Type Modifier
· const
· unsigned
Serial Library
· Serial.begin( … )
· Serial.print( … )
· Serial.println( … )
Sevo Library
· #include <Servo.h> (must be placed at beginning of sketch)
· Servo servoName (each servo must be given a unique identifier)
· servoName.attach( … ) (must be attached to a PWM pin)
· servoName.write(val) (val must be between 0 and 180)
Modes
· INPUT
· OUTPUT
· HIGH
· LOW
· INPUT_PULLUP
Defined Functions
· setup()
· loop()
· analogRead( … )
· analogWrite( … )
· delay( … )
· digitalWrite( … )
· digitalRead( … )
· millis( … )
· pinMode( … )
Conditionals
· if
if (someVariable > 50)
{
// do something here
}
· if / else
if (someVariable > 50)
{
// action A
}
else
{
// action B
}
· while
var = 0;
while(var< 200)
{
// do something repetitive 200 times
var++;
}
· for
for (int i=0; i <= 255; i++)
{
Serial.println(i);
}
Comparison Operators
· x == y (x is equal to y)
· x != y (x is not equal to y)
· x < y (x is less than y)
· x > y (x is greater than y)
· x <= y (x is less than or equal to y)
· x >= y (x is greater than or equal to y)
Boolean Operators
· && and
· || or
· ! not
Special Items
· void – this is only used in function declarations. It indicates that the function is expected to return no information to the function from which it was called.
Arrays
· An array is a collection of variables that are accessed with an index number.
· Declaring an array
int myArray[] = {2, 4, 8, 3, 6};
· Accessing an array
myArray[0] contains 2
myArray[4] contains 6
myArray[5] is invalid and will return random information
