Digital I/O

Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.

Ethernet
Servo Motor
Stepping Motor
Character LCD
SPI
I²C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)
PPG (Pulse Generator)
WiFiEsp
ICS (Serial Servo)

Overview
Task
Queue
Timer
Interrupt Management

The GR-ROSE library is for configuring the digital signal (HIGH/LOW) to function as either input or output.

pinMode

Description

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

Syntax

pinMode(pin, mode)

Parameters

pin: The number of the pin to set
mode:
INPUT
OUTPUT
INPUT_PULLUP (pullup then input)
OUTPUT_OPENDRAIN

Returns

None

digitalWrite

Description

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

Syntax

digitalWrite(uint8_t pin, uint8_t value)

Parameters

pin: The pin number
value: HIGH or LOW

Returns

none

digitalRead

Description

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

Syntax

digitalRead(uint8_t pin)

Parameters

pin: The pin number

Returns

HIGH or LOW

Sample for digitalWrite and digitalRead.

#include <Arduino.h>
void setup() {
  // put your setup code here, to run once:
  pinMode(PIN_LED1, OUTPUT);
 
}
 
void loop() {
  // put your main code here, to run repeatedly: 
  digitalWrite(PIN_LED1, HIGH);
  delay(100);
  digitalWrite(PIN_LED1, LOW);
  delay(100);
}