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- /* << ACE >>
-
- -- Amiga BASIC Compiler --
-
- ** Parser: serial port commands **
- ** Copyright (C) 1998 David Benn
- **
- ** This program is free software; you can redistribute it and/or
- ** modify it under the terms of the GNU General Public License
- ** as published by the Free Software Foundation; either version 2
- ** of the License, or (at your option) any later version.
- **
- ** This program is distributed in the hope that it will be useful,
- ** but WITHOUT ANY WARRANTY; without even the implied warranty of
- ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ** GNU General Public License for more details.
- **
- ** You should have received a copy of the GNU General Public License
- ** along with this program; if not, write to the Free Software
- ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- Author: David J Benn
- Date: 5th,6th September 1993
- */
-
- #include "acedef.h"
- #include <string.h>
-
- /* locals */
- static char *frame_ptr[] = {"(a4)", "(a5)"};
-
- /* externals */
- extern int sym;
- extern int lev;
- extern int obj;
- extern int typ;
- extern SYM *curr_item;
- extern char id[MAXIDSIZE];
-
- /* functions */
- void serial_command (void)
- {
- /* parse a serial command */
-
- insymbol ();
-
- switch (sym)
- {
- case opensym:
- open_serial ();
- break;
-
- case closesym:
- close_serial ();
- break;
-
- case readsym:
- read_serial ();
- break;
-
- case writesym:
- write_serial ();
- break;
-
- default:
- _error (75); /* open,close etc expected */
- break;
- }
- }
-
- void open_serial (void)
- {
- /* open a channel to a serial port.
-
- SERIAL OPEN [#] channel,unit,baud,"N|E|O|M|S<d><s>[A][X]"[,size][,name]
-
- where: channel = unique channel number
- unit = unit of serial device to use
- baud = baud rate
- NEOMS = parity: None, Even, Odd, Mark, Space
- <d> = # of data bits (1 digit)
- <s> = # of stop bits (1 digit)
- A = serial device will use ALL 7 port wires
- X = sets Xon/Xoff mode
- size = size of serial buffer
- name = name of serial device
- */
-
- insymbol ();
-
- if (sym == hash)
- insymbol (); /* # */
-
- if (make_integer (expr ()) == shorttype)
- make_long (); /* channel */
-
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (make_integer (expr ()) == shorttype)
- make_long (); /* unit */
-
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (make_integer (expr ()) == shorttype)
- make_long (); /* baud */
-
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (expr () != stringtype)
- _error (4); /* parameter string */
- else
- {
- /* optional serial READ buffer size */
- if (sym == comma)
- {
- insymbol ();
- if (sym != comma)
- {
- if (make_integer (expr ()) == shorttype)
- make_long (); /* Read buffer size */
- }
- else
- gen ("move.l", "#512", "-(sp)"); /* defaults to 512 bytes */
- }
- else
- gen ("move.l", "#512", "-(sp)"); /* defaults to 512 bytes */
-
- /* optional serial device name */
- if (sym == comma)
- {
- insymbol ();
- if (expr () != stringtype)
- _error (4); /* serial device name */
- }
- else
- gen ("move.l", "#0", "-(sp)"); /* defaults to NULL */
-
- /* call open_serial function */
- gen ("jsr", "_OpenSerial", " ");
- gen ("add.l", "#24", "sp");
- enter_XREF ("_OpenSerial");
- }
- }
- }
- }
- }
-
- void close_serial (void)
- {
- /* close a channel to a serial port.
-
- SERIAL CLOSE [#] channel
- */
-
- insymbol ();
-
- if (sym == hash)
- insymbol (); /* # */
-
- if (make_integer (expr ()) == shorttype)
- make_long (); /* channel */
-
- gen ("jsr", "_CloseSerial", " ");
- gen ("addq", "#4", "sp");
- enter_XREF ("_CloseSerial");
- }
-
- void read_serial (void)
- {
- SYM *storage;
- char addrbuf[40];
-
- /* read a specified number of bytes into a buffer.
-
- SERIAL READ [#] channel,buffer,length
- */
-
- insymbol ();
-
- if (sym == hash)
- insymbol (); /* # */
-
- if (make_integer (expr ()) == shorttype)
- make_long (); /* channel */
-
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (sym == ident && obj == variable) /* buffer */
- {
- /* if string variable/array doesn't exist, create a simple variable */
- if (!exist (id, variable) && !exist (id, array))
- {
- /* allocate a simple string variable */
- enter (id, typ, obj, 0);
- enter_DATA("_nullstring:", "dc.b 0");
- gen ("pea", "_nullstring", " ");
- assign_to_string_variable (curr_item, MAXSTRLEN);
- }
-
- storage = curr_item;
-
- /* is it a string variable or array? */
- if (storage->type != stringtype)
- _error (4);
- else
- {
- /* get address of string pointed to by variable/array element */
- itoa (-1 * storage->address, addrbuf, 10);
- strcat (addrbuf, frame_ptr[lev]);
-
- /* pass string address to function (on stack) */
- if (storage->object == array)
- {
- point_to_array (storage, addrbuf);
- gen ("move.l", addrbuf, "d0");
- gen ("add.l", "d7", "d0");
- gen ("move.l", "d0", "-(sp)");
- }
- else
- gen ("move.l", addrbuf, "-(sp)");
-
- insymbol ();
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (make_integer (expr ()) == shorttype)
- make_long (); /* length */
-
- /* call serial_read function */
- gen ("jsr", "_ReadSerial", " ");
- gen ("add.l", "#12", "sp");
- enter_XREF ("_ReadSerial");
- }
- }
- }
- else
- _error (19); /* variable (or array) expected */
- }
- insymbol ();
- }
-
- void write_serial (void)
- {
- /* write a specified number of bytes from a buffer.
-
- SERIAL WRITE [#] channel,buffer,length
- */
-
- insymbol ();
-
- if (sym == hash)
- insymbol (); /* # */
-
- if (make_integer (expr ()) == shorttype)
- make_long (); /* channel */
-
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (expr () != stringtype)
- _error (4); /* buffer */
- else
- {
- if (sym != comma)
- _error (16);
- else
- {
- insymbol ();
- if (make_integer (expr ()) == shorttype)
- make_long (); /* length */
-
- /* call serial_write function */
- gen ("jsr", "_WriteSerial", " ");
- gen ("add.l", "#12", "sp");
- enter_XREF ("_WriteSerial");
- }
- }
- }
- }
-