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/*
* Copyright (C) 2002-2004 The DOSBox Team
*
* 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.
*/
#if !defined __SERIALPORT_H
#define __SERIALPORT_H
#include <assert.h>
#include "dosbox.h"
//If it's too high you overflow terminal clients buffers i think
#define QUEUE_SIZE 1024
// Serial port interface //
#define MS_CTS 0x01
#define MS_DSR 0x02
#define MS_RI 0x04
#define MS_DCD 0x08
#define MC_DTR 0x1
#define MC_RTS 0x2
class CFifo {
public:
CFifo(Bitu _size) {
size=_size;
pos=used=0;
data=new Bit8u[size];
}
~CFifo() {
delete[] data;
}
INLINE Bitu left(void) {
return size-used;
}
INLINE Bitu inuse(void) {
return used;
}
void clear(void) {
used=pos=0;
}
bool isFull() {
return (used >= size);
}
void addb(Bit8u _val) {
assert(used<size);
Bitu where=pos+used;
if (where>=size) where-=size;
data[where]=_val;
used++;
}
void adds(Bit8u * _str,Bitu _len) {
assert((used+_len)<=size);
Bitu where=pos+used;
used+=_len;
while (_len--) {
if (where>=size) where-=size;
data[where++]=*_str++;
}
}
Bit8u getb(void) {
if (!used) return data[pos];
Bitu where=pos;
if (++pos>=size) pos-=size;
used--;
return data[where];
}
void gets(Bit8u * _str,Bitu _len) {
assert(used>=_len);
used-=_len;
while (_len--) {
*_str++=data[pos];
if (++pos>=size) pos-=size;
}
}
private:
Bit8u * data;
Bitu size,pos,used;
};
class CSerial {
public:
CSerial() {
}
// Constructor takes base port (0x3f0, 0x2f0, 0x2e0, etc.), IRQ, and initial bps //
CSerial (Bit16u initbase, Bit8u initirq, Bit32u initbps);
virtual ~CSerial();
void write_reg(Bitu reg, Bitu val);
Bitu read_reg(Bitu reg);
void SetModemStatus(Bit8u status);
virtual bool CanRecv(void)=0;
virtual bool CanSend(void)=0;
virtual void Send(Bit8u val)=0;
virtual Bit8u Recv(Bit8u val)=0;
virtual void Timer(void);
void checkint(void);
Bitu base;
Bitu irq;
Bitu bps;
Bit8u mctrl;
CFifo *rqueue;
CFifo *tqueue;
private:
void UpdateBaudrate(void);
bool FIFOenabled;
Bit8u FIFOsize;
bool dotxint;
Bit8u scratch;
Bit8u dlab;
Bit8u divisor_lsb;
Bit8u divisor_msb;
Bit8u local_loopback;
Bit8u iir;
Bit8u ier;
Bit8u mstatus;
Bit8u linectrl;
Bit8u errors;
};
#include <list>
typedef std::list<CSerial *> CSerialList;
typedef std::list<CSerial *>::iterator CSerial_it;
extern CSerialList seriallist;
#endif
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