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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"
-
- /* 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()
- {
- /* 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()
- {
- /* 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()
- {
- /* 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()
- {
- 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()
- {
- /* 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");
- }
- }
- }
- }
-