-- Constant definitions for the FreeMODBUS library

-- Copyright (C)2019-2024, Philip Munts dba Munts Technologies.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- * Redistributions of source code must retain the above copyright notice,
--   this list of conditions and the following disclaimer.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.

PACKAGE FreeMODBUS IS

  -- Error codes (returned by the service callbacks)

  MB_ENOERR    : CONSTANT := 0;
  MB_ENOREG    : CONSTANT := 1;
  MB_EINVAL    : CONSTANT := 2;
  MB_EPORTERR  : CONSTANT := 3;
  MB_ENORES    : CONSTANT := 4;
  MB_EIO       : CONSTANT := 5;
  MB_EILLSTATE : CONSTANT := 6;
  MB_ETIMEDOUT : CONSTANT := 7;

  -- I/O Operations (passed to the service callbacks)

  MB_REG_READ  : CONSTANT := 0;
  MB_REG_WRITE : CONSTANT := 1;

END FreeMODBUS;