# Constants

General

LINUXDUINO_VERSION: Shows the current Linuxduino version

GPIO Operations

HIGH: Equal to 1
LOW: Equal to 0
INPUT: Sets GPIO pin as input
OUTPUT: Sets GPIO pin as output
// GPIO Legacy constants
INPUT_PULLUP: No effect same as input
INPUT_PULLDOWN: No effect same as input
(TODO ADD RPI_...)

Serial Operations

DEC: prints as decimal ascii text
HEX: prints as hexadecimal ascii text
BIN: prints as binary ascii text
OCT: prints as octal ascii text
SERIAL_5N1: Opens serial as -> data: 5 bits, partiy: None, stop bits: 1 bit
SERIAL_6N1: Opens serial as -> data: 6 bits, partiy: None, stop bits: 1 bit
SERIAL_7N1: Opens serial as -> data: 7 bits, partiy: None, stop bits: 1 bit
SERIAL_8N1: Opens serial as -> data: 8 bits, partiy: None, stop bits: 1 bit
SERIAL_5N2: Opens serial as -> data: 5 bits, partiy: None, stop bits: 2 bit
SERIAL_6N2: Opens serial as -> data: 6 bits, partiy: None, stop bits: 2 bit
SERIAL_7N2: Opens serial as -> data: 7 bits, partiy: None, stop bits: 2 bit
SERIAL_8N2: Opens serial as -> data: 8 bits, partiy: None, stop bits: 2 bit
SERIAL_5E1: Opens serial as -> data: 5 bits, partiy: Even, stop bits: 1 bit
SERIAL_6E1: Opens serial as -> data: 6 bits, partiy: Even, stop bits: 1 bit
SERIAL_7E1: Opens serial as -> data: 7 bits, partiy: Even, stop bits: 1 bit
SERIAL_8E1: Opens serial as -> data: 8 bits, partiy: Even, stop bits: 1 bit
SERIAL_5E2: Opens serial as -> data: 5 bits, partiy: Even, stop bits: 2 bit
SERIAL_6E2: Opens serial as -> data: 6 bits, partiy: Even, stop bits: 2 bit
SERIAL_7E2: Opens serial as -> data: 7 bits, partiy: Even, stop bits: 2 bit
SERIAL_8E2: Opens serial as -> data: 8 bits, partiy: Even, stop bits: 2 bit
SERIAL_5O1: Opens serial as -> data: 5 bits, partiy: Odd, stop bits: 1 bit
SERIAL_6O1: Opens serial as -> data: 6 bits, partiy: Odd, stop bits: 1 bit
SERIAL_7O1: Opens serial as -> data: 7 bits, partiy: Odd, stop bits: 1 bit
SERIAL_8O1: Opens serial as -> data: 8 bits, partiy: Odd, stop bits: 1 bit
SERIAL_5O2: Opens serial as -> data: 5 bits, partiy: Odd, stop bits: 2 bit
SERIAL_6O2: Opens serial as -> data: 6 bits, partiy: Odd, stop bits: 2 bit
SERIAL_7O2: Opens serial as -> data: 7 bits, partiy: Odd, stop bits: 2 bit
SERIAL_8O2: Opens serial as -> data: 8 bits, partiy: Odd, stop bits: 2 bit

SPI Operations

LSBFIRST: Sends least significant bit first.
MSBFIRST: Sends most significant bit first.
SPI_MODE0: Clock Idle low -> CPOL=0, First edge Sampling -> CPHA=0
SPI_MODE1: Clock Idle low -> CPOL=0, Second edge Sampling -> CPHA=1
SPI_MODE2: Clock Idle high -> CPOL=1, First edge Sampling -> CPHA=0
SPI_MODE3: Clock Idle high -> CPOL=1, Second edge Sampling -> CPHA=1
SPI_CLOCK_DIV2: SPI clock to 8000000 (8 Mhz)
SPI_CLOCK_DIV4: SPI clock to 4000000 (4 Mhz)
SPI_CLOCK_DIV8: SPI clock to 2000000 (2 Mhz)
SPI_CLOCK_DIV16: SPI clock to 1000000 (1 Mhz)
SPI_CLOCK_DIV32: SPI clock to 500000 (500 khz)
SPI_CLOCK_DIV64: SPI clock to 250000 (250 khz)
SPI_CLOCK_DIV128: SPI clock to 125000 (125 khz)

I2C (Wire) Operations

BUFFER_LENGTH: Max I2C buffer available for transfers -> Set to 512 bytes.

# Example

# Javascript

const linuxduino = require('linuxduino');

// Test digitalWrite
(async() => {
  // Wait for wasm file
  await linuxduino.ready;

  var ledPin = 4; // Embedded board GPIO Number
  linuxduino.pinMode(ledPin, linuxduino.OUTPUT);
  console.log("Linuxduino Version:", linuxduino.LINUXDUINO_VERSION);
  while(1) {
    console.log("LED ON");
    linuxduino.digitalWrite(ledPin, linuxduino.HIGH);
    linuxduino.delay(1000); // Delay 1 sec
    console.log("LED OFF");
    linuxduino.digitalWrite(ledPin, linuxduino.LOW);
    linuxduino.delay(1000); // Delay 1 sec
  }
  return 0;
})();

Run it

sudo node digitalWrite.js

# C++

#include "Linuxduino.h"

// Test digitalWrite
int main(void) {
    int ledPin = 4; // Embedded board GPIO Number
    pinMode(ledPin, OUTPUT);
    printf("Linuxduino Version: %s\n", LINUXDUINO_VERSION);
    while(1) {
        printf("LED ON\n");
        digitalWrite(ledPin, HIGH);
        delay(1000); // Delay 1 sec
        printf("LED OFF\n");
        digitalWrite(ledPin, LOW);
        delay(1000); // Delay 1 sec
    }
    return 0;
}

Run it

g++ digitalRead.cpp -o digitalRead -llxduino
sudo ./digitalRead