Basic Library
Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.
Standard Library
Servo Motor
Character LCD
SPI
I2C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)
Digital I/O
This GR-CITRUS sketch reference library is used to input/output a digital signal (HIGH or LOW).
pinMode
- Description
- Configures the specified pin to behave either as an input or an output.
- Syntax
- pinMode(uint8_t pin, uint8_t mode)
- Parameters
- pin: The number of the pin whose mode you wish to set
mode:
INPUT
OUTPUT
INPUT_PULLUP (pull up and input)
OUTPUT_OPENDRAIN (open drain output) - 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
- digitaRead(uint8_t pin)
- Parameters
- pin: The number of the digital pin you want to read
- Returns
- HIGH or LOW
Sample Program
This sample makes an LED blink.
#include <Arduino.h>
#define INTERVAL 100
void setup()
{
pinMode(PIN_LED0, OUTPUT);
}
void loop()
{
static led = 1;
digitalWrite(PIN_LED0, led);
led = !led;
delay(100);
}
