Packages

modbus

0.4.0
0.4.0 0.3.9 0.3.8 0.3.7 0.3.6 0.3.5 0.3.4 0.3.3 0.3.2 0.3.1 0.3.0 0.2.0 0.1.0

Modbus library with TCP Master & Slave implementation.

HexDocs

Current section

Files

Jump to
Readme
13 Versions
0 Dependencies
Dependants
Files
Activity
modbus test float_test.exs
Raw

test/float_test.exs 

defmodule Modbus.FloatTest do

  use ExUnit.Case

  alias Modbus.Float



  # https://www.h-schmidt.net/FloatConverter/Float.html

  # endianess tested agains opto22 analog modules

  test "float convertion test" do

    assert [0xC0A0, 0x0000] == Float.to_be([-5.0])

    assert [0x0000, 0xC0A0] == Float.to_le([-5.0])

    assert [0x40A0, 0x0000] == Float.to_be([+5.0])

    assert [0x0000, 0x40A0] == Float.to_le([+5.0])

    assert [0xC0A0, 0x0000, 0x40A0, 0x0000] == Float.to_be([-5.0, +5.0])

    assert [0x0000, 0xC0A0, 0x0000, 0x40A0] == Float.to_le([-5.0, +5.0])

    assert [-5.0] == Float.from_be([0xC0A0, 0x0000])

    assert [-5.0] == Float.from_le([0x0000, 0xC0A0])

    assert [+5.0] == Float.from_be([0x40A0, 0x0000])

    assert [+5.0] == Float.from_le([0x0000, 0x40A0])

    assert [-5.0, +5.0] == Float.from_be([0xC0A0, 0x0000, 0x40A0, 0x0000])

    assert [-5.0, +5.0] == Float.from_le([0x0000, 0xC0A0, 0x0000, 0x40A0])

  end

end