User manual

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Data type

boolean

char

byte

int

unsigned int

long

unsigned long

float

double

string

array

void

Constant

HIGH | LOW Said digital IO port level, HIGH Said high level(1), LOW Said low electric

flat(0).

INPUT | OUTPUT Said digital IO port direction, INPUT Said input (high impedance state)

OUTPUT Said output (AVR can provide 5 v voltage and ma current).

TURE | FALSE true(1) , false(0）.

All above are the basic c grammar words and symbols, everybody can understand, and the

specific use can combine experimental procedure.

Structure

 void setup()

The setup() function is called when a sketch starts. Use it to initialize variables, pin modes, start

using libraries, etc. The setup function will only run once, after each power up or reset of the

Arduino board.

 void loop()

After creating a setup() function, which initializes and sets the initial values, the loop() function

does precisely what its name suggests, and loops consecutively, allowing your program to change

and respond. Use it to actively control the Arduino board.

Function

 Digital I/O

pinMode(pin, mode) pin 0~13, mode is input or output.

digitalWrite(pin, value) pin 0~13, value is HIGH or LOW.

int digitalRead(pin) pin 0~13, value is HIGH or LOW.