blob: 3954f25dcf96480de865ac3b094462a7802e0471 [file] [log] [blame] [raw]
#ifndef _SERIAL_H
#define _SERIAL_H
#include <stdio.h>
#define LOG_SERIAL 0
class CSerial {
protected:
CSerial *PrevDevice;
CSerial *NextDevice;
char Name[16];
unsigned int DeviceNr;
static unsigned int NrOfDevicesAttached;
static CSerial *RootDevice;
static CSerial *LastDevice;
public:
CSerial();
virtual ~CSerial();
CSerial(unsigned int DevNr);
CSerial *getNext() { return NextDevice; };
unsigned int getDeviceNumber() { return DeviceNr; };
//
virtual void update() {};
virtual void UpdateSerialState(unsigned char ) { };
virtual unsigned char readBusWithUpdate() {
return readBus();
}
// State of IEC lines (bit 7 - DATA, bit 6 - CLK, bit 4 - ATN)
static unsigned char serialPort[16];
static void InitPorts();
static unsigned char readBus();
static class CSerial *Devices[16];
static CSerial *getRoot() { return RootDevice; };
//
friend class TED;
};
inline unsigned char CSerial::readBus()
{
CSerial *sDevPtr = CSerial::getRoot();
while (sDevPtr) {
sDevPtr->update();
sDevPtr = sDevPtr->getNext();
}
// the bus is using open-collectors so do an AND with all devices attached
#if LOG_SERIAL
{
static unsigned char prev = 0xFF;
unsigned char retval =
serialPort[0]
&serialPort[4]&serialPort[5] // printers
&serialPort[8]&serialPort[9]&serialPort[10]&serialPort[11];
if (retval ^ prev) {
fprintf(stderr, "Serial read: %02X\n", retval);
prev = retval;
}
return retval;
}
#else
unsigned char retVal = serialPort[0]
&serialPort[4]&serialPort[5] // printers
&serialPort[8]&serialPort[9]&serialPort[10]&serialPort[11]; // drives
return retVal;
#endif
}
class CTrueSerial : public CSerial {
public:
CTrueSerial(unsigned int DevNr) : CSerial(DevNr) { };
};
class IEC;
class CIECDevice;
class IecFakeSerial : public CSerial
{
public:
IecFakeSerial(unsigned int DevNr, CIECDevice *iecDev);
virtual ~IecFakeSerial() {};
virtual void UpdateSerialState() {
update();
};
virtual void UpdateSerialState(unsigned char newAtn) {
update();
writeBus(newAtn);
};
virtual unsigned char readBusWithUpdate() {
#if 0
update();
return serialPort[dev_nr];
#else
return readBus();
#endif
}
virtual unsigned char readBusWithoutUpdate() {
return serialPort[0]
& serialPort[4]
& serialPort[8] & serialPort[9] & serialPort[10] & serialPort[11];
}
void writeBus(unsigned char newLines);
inline void updateBus() {
serialPort[dev_nr] = dataLine | clkLine;
}
virtual void update();
private:
IecFakeSerial();
protected:
void interpretIecByte();
CIECDevice *iecDevice;
unsigned int state;
unsigned int step;
unsigned int addr;
unsigned int secondaryAddress;
unsigned int secondaryAddress_prev;
unsigned char dev_nr;
size_t timeout;
size_t cycleCount;
unsigned char errorState;
unsigned int eoi;
unsigned int clkLine;
unsigned int dataLine;
unsigned char io_byte;
unsigned int bitCounter;
unsigned int dataTransfered;
unsigned char atnInLine;
unsigned char oldAtnLine;
unsigned long clock_rate;
//
char nameBuffer[16]; // Buffer for file names and command strings
char *namePtr; // Pointer for reception of file name
int nameLength; // Received length of file name
};
#endif // _SERIAL_H