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/*************************************************************************
**** Miscelaneous definitions.*/typedef unsigned short ushort;typedef unsigned char uchar;
#define NULL 0
#define FALSE 0
#define TRUE 1
#define LPTx 0x80 /* Mask to indicate cid is for LPT device */ /*081985*/
#define LPTxMask 0x7F /* Mask to get cid for LPT device */ /*081985*/
#define PIOMAX 3 /* Max number of LPTx devices in high level */ /*081985*/
#define CDEVMAX 10 /* Max number of COMx devices in high level */
#define DEVMAX 13 /* Max number of devices in high level */ /*081985*/
/*************************************************************************
**** device control block.** This block of information defines the functional parameters of the** communications software and hardware.**** Fields in the DCB are defined as follows:**** Id - Comm device ID, set by the device driver.** BaudRate - Baud rate at which operating.** ByteSize - Number of bits per transmitted/received byte. (4-8)** Received data is also masked off to this size.** Parity - Transmitt/Receive Parity. (0,1,2,3,4) = (None, Odd,** Even, Mark, Space)** StopBits - Number of stop bits. (0,1,2) = (1, 1.5, 2)** RlsTimeout - Amount of time, in milleseconds, to wait for RLSD to** become high. RLSD, Receive Line Signal Detect is also** known as CD, Carrier Detect. RLSD flow control can be** achieved by specifying infinite timeout.** CtsTimeout - Amount of time, in milleseconds, to wait for CTS,** Clear To Send, to become high. CTS flow control can** be achieved by specifying infinite timeout.** DsrTimeout - Amount of time, in milleseconds, to wait for DSR,** Data Set Ready, to become high. DSR flow control can** be acheived by specifying infinite timeout.** fBinary - Binary Mode flag. In non-binary mode, EofChar is** recognized and remembered as end of data.** fRtsDisable - Disable RTS flag. If set, Request To Send is NOT** used, and remains low. Normally, RTS is asserted when** the device is openned, and dropped when closed.** fParity - Enable Parity Checking. Parity errors are not** reported when 0.** fOutxCtsFlow - enable output xon/xoff(hardware) using cts** fOutxDsrFlow - enable output xon/xoff(hardware) using dsr** fOutX - Indicates that X-ON/X-OFF flow control is to be used** during transmission. The transmitter will halt if** an X-OFF character is received, and will start again** when an X-ON character is received.** fInX - Indicates that X-ON/X-OFF flow control is to be used** during reception. An X-OFF character will be** transmitted when the receive queue comes within 10** characters of being full, after which an X-ON will be** transmitted when the queue comes with 10 characters** of being empty.** fPeChar - Indicates that characters received with parity errors** are to be replaced with the character specified in** PeChar, below.** fNull - Indicates that received NULL characters are to be** discarded.** fChEvt - Indicates that the reception of EvtChar is to be** flagged as an event by cevt.** fDtrFlow - Indicates that the DTR signal is to be used for** receive flow control. (cextfcn can be used to set and** clear DTR, overriding this definition).** fRtsFlow - Indicates that the RTS signal is to be used for** receive flow control. (cextfcn can be used to set and** clear RTS, overriding this definition).** XonChar - X-ON character for both transmit and receive** XoffChar - X-OFF character for both transmit and receive** XonLim - When the number of characters in the receive queue** drops below this value, then an X-ON character is** sent, if enabled, and DTR is set, if enabled.** XoffLim - When the number of characters in the receive queue** exceeds this value, then an X-OFF character is sent,** if enabled, and DTR is dropped, if enabled.** PeChar - Parity Error replacement character.** EvtChar - Character which triggers an event flag.** EofChar - Character which specifies end of input.** TxDelay - Specifies the minimum amount of time that must pass** between transmission of characters.**** Timeouts are in milleseconds. 0 means ignore the signal. 0xffff means** infinite timeout.***************************************************************************/typedef struct { char Id; /* Internal Device ID */ ushort BaudRate; /* Baudrate at which runing */ char ByteSize; /* Number of bits/byte, 4-8 */ char Parity; /* 0,1,2,3,4 = None,Odd,Even,Mark,Sp*/ char StopBits; /* 0,1,2 = 1, 1.5, 2 */ ushort RlsTimeout; /* Timeout for RLSD to be set */ ushort CtsTimeout; /* Timeout for CTS to be set */ ushort DsrTimeout; /* Timeout for DSR to be set */
uchar fBinary: 1; /* CTRL-Z as EOF flag */ uchar fRtsDisable:1; /* Suppress RTS */ uchar fParity: 1; /* Enable parity check */ uchar fOutxCtsFlow: 1; /* Enable output xon/xoff with cts */ uchar fOutxDsrFlow: 1; /* Enable output xon/xoff with dsr */ uchar fDummy: 3;
uchar fOutX: 1; /* Enable output X-ON/X-OFF */ uchar fInX: 1; /* Enable input X-ON/X-OFF */ uchar fPeChar: 1; /* Enable Parity Err Replacement */ uchar fNull: 1; /* Enable Null stripping */ uchar fChEvt: 1; /* Enable Rx character event. */ uchar fDtrflow: 1; /* Enable DTR flow control */ uchar fRtsflow: 1; /* Enable RTS flow control */ uchar fDummy2: 1;
char XonChar; /* Tx and Rx X-ON character */ char XoffChar; /* Tx and Rx X-OFF character */ ushort XonLim; /* Transmit X-ON threshold */ ushort XoffLim; /* Transmit X-OFF threshold */ char PeChar; /* Parity error replacement char */ char EofChar; /* End of Input character */ char EvtChar; /* Recieved Event character */ ushort TxDelay; /* Amount of time between chars */ } DCB;
/*************************************************************************
**** COMSTAT** Status record returned by GetCommError***************************************************************************/typedef struct { uchar fCtsHold: 1; /* Transmit is on CTS hold */ uchar fDsrHold: 1; /* Transmit is on DSR hold */ uchar fRlsdHold: 1; /* Transmit is on RLSD hold */ uchar fXoffHold: 1; /* Transmit is on X-Off hold */ uchar fXoffSent: 1; /* Recieve in X-Off or DTR hold */ uchar fEof: 1; /* End of file character found */ uchar fTxim: 1; /* Character being transmitted */ uchar fPerr:1; /* Printer error */ /*081985*/ ushort cbInQue; /* count of characters in Rx Que*/ ushort cbOutQue; /* count of characters in Tx Que*/ } COMSTAT;
/*************************************************************************
**** DCB field definitions.***************************************************************************/#define NOPARITY 0
#define ODDPARITY 1
#define EVENPARITY 2
#define MARKPARITY 3
#define SPACEPARITY 4
#define ONESTOPBIT 0
#define ONE5STOPBITS 1
#define TWOSTOPBITS 2
#define IGNORE 0 /* Ignore signal */
#define INFINITE 0xffff /* Infinite timeout */
/*************************************************************************
**** Comm Device Driver Error Bits.***************************************************************************/#define CE_RXOVER 0x0001 /* Receive Queue overflow */
#define CE_OVERRUN 0x0002 /* Receive Overrun Error */
#define CE_RXPARITY 0x0004 /* Receive Parity Error */
#define CE_FRAME 0x0008 /* Receive Framing error */
#define CE_CTSTO 0x0020 /* CTS Timeout */
#define CE_DSRTO 0x0040 /* DSR Timeout */
#define CE_RLSDTO 0x0080 /* RLSD Timeout */
#define CE_PTO 0x0100 /* LPTx Timeout */ /*081985*/
#define CE_IOE 0x0200 /* LPTx I/O Error */ /*081985*/
#define CE_DNS 0x0400 /* LPTx Device not selected */ /*081985*/
#define CE_OOP 0x0800 /* LPTx Out-Of-Paper */ /*081985*/
#define CE_MODE 0x8000 /* Requested mode unsupported */
/*************************************************************************
**** Initialization Error Codes***************************************************************************/#define IE_BADID -1 /* Invalid or unsupported id */
#define IE_OPEN -2 /* Device Already Open */
#define IE_NOPEN -3 /* Device Not Open */
#define IE_MEMORY -4 /* Unable to allocate queues */
#define IE_DEFAULT -5 /* Error in default parameters */
#define IE_HARDWARE -10 /* Hardware Not Present */
#define IE_BYTESIZE -11 /* Illegal Byte Size */
#define IE_BAUDRATE -12 /* Unsupported BaudRate */
/*************************************************************************
**** Event mask definitions. Used by SetCommEventMask and GetCommEventMask**** RXCHAR - Set when any character is received and placed in the input** queue.** RXFLAG - Set when a particular character, as defined in the dcb, is** received and placed in the input queue.** TXEMPTY - Set when the last character in the transmit queue is** transmitted.** CTS - Set when the CTS signal changes state.** DSR - Set when the DSR signal changes state.** RLSD - Set when the RLSD signal changes state.** BREAK - Set when a break is detected on input.** ERR - Set when a line status error occurs.***************************************************************************/#define EV_RXCHAR 0x0001 /* Any Character received */
#define EV_RXFLAG 0x0002 /* Received certain character */
#define EV_TXEMPTY 0x0004 /* Transmitt Queue Empty */
#define EV_CTS 0x0008 /* CTS changed state */
#define EV_DSR 0x0010 /* DSR changed state */
#define EV_RLSD 0x0020 /* RLSD changed state */
#define EV_BREAK 0x0040 /* BREAK received */
#define EV_ERR 0x0080 /* Line Status Error Occurred */
#define EV_RING 0x0100 /* Ring signal detected */
#define EV_PERR 0x0200 /* LPTx error occured */ /*081985*/
/*************************************************************************
**** Extended Functions**** SETXOFF - Causes transmit to behave as if an X-OFF character had** been received. Valid only if transmit X-ON/X-OFF specified** in the dcb.** SETXON - Causes transmit to behave as if an X-ON character had** been received. Valid only if transmit X-ON/X-OFF specified** in the dcb.*************************************************************************/#define SETXOFF 1 /* Set X-Off for output control */
#define SETXON 2 /* Set X-ON for output control */
#define SETRTS 3 /* Set RTS high */
#define CLRRTS 4 /* Set RTS low */
#define SETDTR 5 /* Set DTR high */
#define CLRDTR 6 /* Set DTR low */
#define RESETDEV 7 /* Reset device if possible */ /*081985*/
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