(* libsimpleio bindings for GNU Modula-2 *)

(* Copyright (C)2018-2023, Philip Munts dba Munts Technologies.                *)
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(* Redistribution and use in source and binary forms, with or without          *)
(* modification, are permitted provided that the following conditions are met: *)
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DEFINITION MODULE FOR "C" libserial;

  FROM SYSTEM IMPORT BYTE;

  EXPORT UNQUALIFIED
    PARITY_NONE,
    PARITY_EVEN,
    PARITY_ODD,
    SERIAL_open,
    SERIAL_close,
    SERIAL_send,
    SERIAL_receive;

  CONST
    PARITY_NONE = 0;
    PARITY_EVEN = 1;
    PARITY_ODD  = 2;

  PROCEDURE SERIAL_open
   (name      : ARRAY OF CHAR;
    baudrate  : CARDINAL;
    parity    : CARDINAL;
    databits  : CARDINAL;
    stopbits  : CARDINAL;
    VAR fd    : INTEGER;
    VAR error : CARDINAL);

  PROCEDURE SERIAL_close
   (fd        : INTEGER;
    VAR error : CARDINAL);

  PROCEDURE SERIAL_send
   (fd        : INTEGER;
    buf       : ARRAY OF BYTE;
    bufsize   : CARDINAL;
    VAR count : CARDINAL;
    VAR error : CARDINAL);

  PROCEDURE SERIAL_receive
   (fd        : INTEGER;
    VAR buf   : ARRAY OF BYTE;
    bufsize   : CARDINAL;
    VAR count : CARDINAL;
    VAR error : CARDINAL);

END libserial.