DigitalIO

Functions
void	pinMode (uint8_t pin, uint8_t mode)
void	digitalWrite (uint8_t pin, uint8_t value)
int	digitalRead (uint8_t pin)

Detailed Description

Function Documentation

pinMode()

void pinMode	(	uint8_t	pin,
		uint8_t	mode
	)

Description

Configures the specified pin to behave either as an input or an output

Syntax

pinMode(pin, mode);

Parameters

pin	the pin which you want to set
mode	INPUT, OUTPUT, or INPUT_PULLUP

Returns

void

Example

uint8_t ledPin = 36;   // LED connected to digital pin 36
uint8_t inputPin = 13; // input connected to digital pin 13 

void setup()
{
    pinMode(ledPin, OUTPUT);         // sets the digital pin 36 as output  
    pinMode(inputPin, INPUT_PULLUP); // sets the digital pin 13 as input
}

void loop()
{
    int val = digitalRead(inputPin); // read the input pin
    if (val == LOW) 
        digitalWrite(ledPin, HIGH); // enable led if input is LOW
    else 
        digitalWrite(ledPin, LOW); // disable led if input is HIGH
} 

Examples:

RAK_Thread/src/app.cpp.

digitalWrite()

void digitalWrite	(	uint8_t	pin,
		uint8_t	value
	)

Description

Write a HIGH or a LOW value to a digital pin.

Syntax

digitalWrite(pin, value);

Parameters

pin	the pin which you want to write
value	HIGH or LOW

Returns

void

Example

uint8_t ledPin = 36;   // LED connected to digital pin 36
uint8_t inputPin = 13; // input connected to digital pin 13

void setup()
{
    pinMode(ledPin, OUTPUT);         // sets the digital pin 36 as output
    pinMode(inputPin, INPUT_PULLUP); // sets the digital pin 13 as input
}

void loop()
{
    int val = digitalRead(inputPin); // read the input pin
    if (val == LOW)
        digitalWrite(ledPin, HIGH); // enable led if input is LOW
    else
        digitalWrite(ledPin, LOW); // disable led if input is HIGH
}

Examples:

RAK_Thread/src/app.cpp.

digitalRead()

int digitalRead

(

uint8_t

pin

)

Description

Reads the value from a specified digital pin, either HIGH or LOW

Syntax

digitalRead(pin);

Parameters

pin	the pin which you want to read

Returns

HIGH or LOW(Type: int)

Example

uint8_t ledPin = 36;   // LED connected to digital pin 36
uint8_t inputPin = 13; // input connected to digital pin 13

void setup()
{
    pinMode(ledPin, OUTPUT);         // sets the digital pin 36 as output
    pinMode(inputPin, INPUT_PULLUP); // sets the digital pin 13 as input
}

void loop()
{
    int val = digitalRead(inputPin); // read the input pin
    if (val == LOW)
        digitalWrite(ledPin, HIGH); // enable led if input is LOW
    else
        digitalWrite(ledPin, LOW); // disable led if input is HIGH
}

Examples:

RAK_Thread/src/app.cpp.