Code
http://arduino.cc/en/Reference/HomePage
The Arduino Environment
Board Type
Serial Port / COM Port
The Environment
Parts of the Sketch
Comments
Comments
Comments
Comments
Operators
The equals sign
= is used to assign a value
== is used to compare values
Operators
And & Or
&& is “and”
|| is “or”
Variables
Basic variable types:
Boolean
Integer
Character
Declaring Variables
Boolean: boolean variableName;
Declaring Variables
Boolean: boolean variableName;
Integer: int variableName;
Declaring Variables
Boolean: boolean variableName;
Integer: int variableName;
Character: char variableName;
Declaring Variables
Boolean: boolean variableName;
Integer: int variableName;
Character: char variableName;
String: stringName [ ];
Assigning Variables
Boolean: variableName = true;
or variableName = false;
Assigning Variables
Boolean: variableName = true;
or variableName = false;
Integer: variableName = 32767;
or variableName = -32768;
Assigning Variables
Boolean: variableName = true;
or variableName = false;
Integer: variableName = 32767;
or variableName = -32768;
Character: variableName = ‘A’;
or stringName = “SparkFun”;
Variable Scope�Where you declare your variables matters
Setup�void setup ( ) { }
The setup function comes before
the loop function and is necessary
for all Arduino sketches
Setup�void setup ( ) { }
The setup header will never change,
everything else that occurs in setup
happens inside the curly brackets
Setup�void setup ( ) { �pinMode (13, OUTPUT); }
Outputs are declare in setup, this is done by using the pinMode function
This particular example declares digital pin # 13 as an output, remember to use CAPS
Setup�void setup ( ) { Serial.begin;}
Serial communication also begins in setup
This particular example declares Serial communication at a baud rate of 9600. More on Serial later...
Setup, Internal Pullup Resistors�void setup ( ) { �digitalWrite (12, HIGH); }
You can also create internal pullup resistors in setup, to do so digitalWrite the pin HIGH
This takes the place of the pullup resistors currently on your circuit 7 buttons
Setup, Interrupts�void setup ( ) { �attachInterrupt (interrupt, function, mode) }
You can designate an interrupt function to Arduino pins # 2 and 3
This is a way around the linear processing of Arduino
Setup, Interrupts�void setup ( ) { �attachInterrupt (interrupt, function, mode) }
Interrupt: the number of the interrupt, 0 or 1, corresponding to Arduino pins # 2 and 3 respectively
Function: the function to call when the interrupt occurs
Mode: defines when the interrupt should be triggered
Setup, Interrupts�void setup ( ) { �attachInterrupt (interrupt, function, mode) }
Don’t forget to CAPITALIZE
If Statements
if ( this is true ) { do this; }
If
if ( this is true ) { do this; }
Conditional
if ( this is true ) { do this; }
Action
if ( this is true ) { do this; }
Else
else { do this; }
Basic Repetition
Basic Repetition
void loop ( ) { }
Basic Repetition
void loop ( ) { }
Basic Repetition
void loop ( ) { }
The “void” in the header is what the function will return (or spit out) when it happens, in this case it returns nothing so it is void
Basic Repetition
void loop ( ) { }
The “loop” in the header is what the function is called, sometimes you make the name up, sometimes (like loop) the function already has a name
Basic Repetition
void loop ( ) { }
The “( )” in the header is where you declare any variables that you are “passing” (or sending) the function, the loop function is never “passed” any variables
Basic Repetition
void loop ( ) { }
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
//this could be anything
}
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
}
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
}
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
}
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
}
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
}
Basic Repetition
for (int count = 0; count<10; count++)
{
//for action code goes here
}
Basic Repetition
while ( count<10 )
{
//while action code goes here
}
Basic Repetition
while ( count<10 )
{
//while action code goes here
//should include a way to change count
//variable so the computer is not stuck
//inside the while loop forever
}
Basic Repetition
while ( count<10 )
{
//looks basically like a “for” loop
//except the variable is declared before
//and incremented inside the while
//loop
}
Basic Repetition
Or maybe:
while ( digitalRead(buttonPin)==1 )
{
//instead of changing a variable
//you just read a pin so the computer
//exits when you press a button
//or a sensor is tripped
}
Questions?
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