Class: Pport::LinuxPport

Inherits:
Object
  • Object
show all
Defined in:
lib/linux_pport.rb

Overview

Class representing a parallel port on a linux operating system.

Uses the file /dev/port to interact with the parallel port.

Instance Method Summary collapse

Constructor Details

#initialize(address) ⇒ LinuxPport

Opens the file /dev/port for reading and writing.



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# File 'lib/linux_pport.rb', line 22

def initialize(address)

    @address = address
    @file = File.open('/dev/port', 'r+')
end

Instance Method Details

#read ⇒ Object

Seeks the port’s address and reads the value there.



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# File 'lib/linux_pport.rb', line 29

def read()
    @file.seek(@address)
    @file.getc
end

#write(val) ⇒ Object

Seeks the port’s address and writes val to that location.



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# File 'lib/linux_pport.rb', line 35

def write(val)
    @file.seek(@address)
    @file.putc(val)
    @file.flush
end