/************************************************************************* ** ** Miscelaneous definitions. */ typedef unsigned short ushort; typedef unsigned char uchar; #ifdef NOCOMM /************************************************************************* ** ** 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*/ #endif /* Escapes for comm */ #define GETMAXLPT 8 /* Max supported LPT id */ #define GETMAXCOM 9 /* Max supported COM id */ #define GETBASEIRQ 10 /* Get port base & irq for a port */