Module: PrologixGpib::Usb

Included in:
UsbController
Defined in:
lib/prologix_gpib/usb.rb

Defined Under Namespace

Classes: Error

Constant Summary collapse

EOL = 
"\r\n".freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#serial_port ⇒ Object (readonly)

Returns the value of attribute serial_port.



9
10
11
 
# File 'lib/prologix_gpib/usb.rb', line 9

def serial_port
  @serial_port
end

Instance Method Details

#close ⇒ Object 



22
23
24
25
26
27
28
 
# File 'lib/prologix_gpib/usb.rb', line 22

def close
  return unless connected?

  @serial_port.close
  @serial_port = nil
  @serial_port.nil?
end

#initialize(path, mode: :controller, address: 9) {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:



11
12
13
14
15
16
17
18
19
20
 
# File 'lib/prologix_gpib/usb.rb', line 11

def initialize(path, mode: :controller, address: 9)
  open_serial_port(path)
  flush
  self.mode = mode
  self.address = address
  self.auto = :disable
  self.eos = 0

  yield self if block_given?
end

#read(bytes) ⇒ Object 



36
37
38
39
40
 
# File 'lib/prologix_gpib/usb.rb', line 36

def read(bytes)
  return unless connected?

  @serial_port.read(bytes)
end

#readline ⇒ Object 



42
43
44
45
46
 
# File 'lib/prologix_gpib/usb.rb', line 42

def readline
  return unless connected?

  t = Timeout.timeout(1, Timeout::Error, 'No response from device') { getline }
end

#sr(register = nil) ⇒ Object 



48
49
50
51
52
53
54
55
 
# File 'lib/prologix_gpib/usb.rb', line 48

def sr(register = nil)
  write 'SR'
  write '++read eoi'
  array = []
  24.times { array << readline }
  array.map! { |byte| '%08b' % byte.to_i }
  register.nil? ? array : array[register - 1]
end

#write(string) ⇒ Object 



30
31
32
33
34
 
# File 'lib/prologix_gpib/usb.rb', line 30

def write(string)
  return unless connected?

  @serial_port.write("#{string}#{EOL}")
end