Simple Ruby Example To Read And Write Bytes To Arduino Serial Port.

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mqu/arduino-serial.ino Created March 31, 2015 05:21 Show Gist options

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Learn more about clone URLs Clone this repository at <script src="https://gist.github.com/mqu/f32599117f1fa21c1b2c.js"></script> Save mqu/f32599117f1fa21c1b2c to your computer and use it in GitHub Desktop. Download ZIP simple ruby example to read and write bytes to Arduino serial port. Raw arduino-serial.ino This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

uint8_t c;

void setup()

{

// Open serial communications and wait for port to open:

Serial.begin(4800); // 8E2 : 8bits, 2 stops bits, even parity.

// Serial.begin(4800, SERIAL_8E2); // 8E2 : 8bits, 2 stops bits, even parity.

while (!Serial) {

; // wait for serial port to connect. Needed for Leonardo only

}

c='a';

}

void loop() {

loop2();

}

void loop1() {

Serial.write(c);

c++;

delay(1000);

}

void loop2() {

if (Serial.available() > 0) {

// read the incoming byte:

c = Serial.read();

// c++;

// Serial.println(c);

Serial.write(c);

}

}

void loop3() {

Serial.write(c);

c++;

delay(1000);

}

Raw arduino-serial.rb This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

# link : http://playground.arduino.cc/interfacing/ruby

#simplest ruby program to read from arduino serial,

#using the SerialPort gem

#(http://rubygems.org/gems/serialport)

require "pp"

require "serialport"

class TTy

def initialize

# defaults params for arduino serial

baud_rate = 4800

data_bits = 8

stop_bits = 1

parity = SerialPort::NONE

# serial port

@sp=nil

@port=nil

end

def open port

@sp = SerialPort.new(port, @baud_rate, @data_bits, @stop_bits, @parity)

end

def shutdown reason

return if @sp==nil

return if reason==:int

printf("\nshutting down serial (%s)\n", reason)

# you may write something before closing tty

@sp.write(0x00)

@sp.flush()

printf("done\n")

end

def read

@sp.flush()

printf("# R : reading ...\n")

c=nil

while c==nil

c=@sp.read(1)

break if c != nil

end

printf("# R : 0x%02x\n", c.ord)

return c

# @sp.readByte()

end

def write c

@sp.putc(c)

@sp.flush()

printf("# W : 0x%02x\n", c.ord)

end

def flush

@sp.flush

end

end

# serial port should be connected to /dev/ttyUSB*

ports=Dir.glob("/dev/ttyUSB*")

if ports.size != 1

printf("did not found right /dev/ttyUSB* serial")

exit(1)

end

tty=TTy.new()

tty.open(ports[0])

at_exit { tty.shutdown :exit }

trap("INT") { tty.shutdown :int ; exit}

# reading thread

Thread.new do

d=0x16

pp d

while true do

sleep(0.01)

tty.write(d)

tty.flush()

# build a loop with a value (d) cycling from 0 to 255

d=d+1

d=d%255

end

end

#just read forever

while true do

while (true) do

c=tty.read()

sleep(0.01)

end

end

sleep 500

tty.shutdown

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