241 lines
13 KiB
C
241 lines
13 KiB
C
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/*************************************************************************
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**
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** Miscelaneous definitions.
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*/
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typedef unsigned short ushort;
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typedef unsigned char uchar;
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#ifdef NOCOMM
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/*************************************************************************
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**
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** device control block.
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** This block of information defines the functional parameters of the
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** communications software and hardware.
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**
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** Fields in the DCB are defined as follows:
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**
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** Id - Comm device ID, set by the device driver.
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** BaudRate - Baud rate at which operating.
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** ByteSize - Number of bits per transmitted/received byte. (4-8)
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** Received data is also masked off to this size.
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** Parity - Transmitt/Receive Parity. (0,1,2,3,4) = (None, Odd,
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** Even, Mark, Space)
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** StopBits - Number of stop bits. (0,1,2) = (1, 1.5, 2)
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** RlsTimeout - Amount of time, in milleseconds, to wait for RLSD to
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** become high. RLSD, Receive Line Signal Detect is also
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** known as CD, Carrier Detect. RLSD flow control can be
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** achieved by specifying infinite timeout.
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** CtsTimeout - Amount of time, in milleseconds, to wait for CTS,
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** Clear To Send, to become high. CTS flow control can
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** be achieved by specifying infinite timeout.
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** DsrTimeout - Amount of time, in milleseconds, to wait for DSR,
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** Data Set Ready, to become high. DSR flow control can
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** be acheived by specifying infinite timeout.
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** fBinary - Binary Mode flag. In non-binary mode, EofChar is
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** recognized and remembered as end of data.
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** fRtsDisable - Disable RTS flag. If set, Request To Send is NOT
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** used, and remains low. Normally, RTS is asserted when
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** the device is openned, and dropped when closed.
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** fParity - Enable Parity Checking. Parity errors are not
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** reported when 0.
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** fOutxCtsFlow - enable output xon/xoff(hardware) using cts
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** fOutxDsrFlow - enable output xon/xoff(hardware) using dsr
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** fOutX - Indicates that X-ON/X-OFF flow control is to be used
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** during transmission. The transmitter will halt if
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** an X-OFF character is received, and will start again
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** when an X-ON character is received.
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** fInX - Indicates that X-ON/X-OFF flow control is to be used
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** during reception. An X-OFF character will be
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** transmitted when the receive queue comes within 10
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** characters of being full, after which an X-ON will be
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** transmitted when the queue comes with 10 characters
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** of being empty.
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** fPeChar - Indicates that characters received with parity errors
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** are to be replaced with the character specified in
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** PeChar, below.
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** fNull - Indicates that received NULL characters are to be
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** discarded.
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** fChEvt - Indicates that the reception of EvtChar is to be
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** flagged as an event by cevt.
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** fDtrFlow - Indicates that the DTR signal is to be used for
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** receive flow control. (cextfcn can be used to set and
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** clear DTR, overriding this definition).
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** fRtsFlow - Indicates that the RTS signal is to be used for
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** receive flow control. (cextfcn can be used to set and
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** clear RTS, overriding this definition).
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** XonChar - X-ON character for both transmit and receive
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** XoffChar - X-OFF character for both transmit and receive
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** XonLim - When the number of characters in the receive queue
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** drops below this value, then an X-ON character is
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** sent, if enabled, and DTR is set, if enabled.
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** XoffLim - When the number of characters in the receive queue
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** exceeds this value, then an X-OFF character is sent,
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** if enabled, and DTR is dropped, if enabled.
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** PeChar - Parity Error replacement character.
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** EvtChar - Character which triggers an event flag.
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** EofChar - Character which specifies end of input.
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** TxDelay - Specifies the minimum amount of time that must pass
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** between transmission of characters.
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**
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** Timeouts are in milleseconds. 0 means ignore the signal. 0xffff means
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** infinite timeout.
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**
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*************************************************************************/
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typedef struct {
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char Id; /* Internal Device ID */
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ushort BaudRate; /* Baudrate at which runing */
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char ByteSize; /* Number of bits/byte, 4-8 */
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char Parity; /* 0,1,2,3,4 = None,Odd,Even,Mark,Sp*/
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char StopBits; /* 0,1,2 = 1, 1.5, 2 */
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ushort RlsTimeout; /* Timeout for RLSD to be set */
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ushort CtsTimeout; /* Timeout for CTS to be set */
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ushort DsrTimeout; /* Timeout for DSR to be set */
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uchar fBinary: 1; /* CTRL-Z as EOF flag */
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uchar fRtsDisable:1; /* Suppress RTS */
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uchar fParity: 1; /* Enable parity check */
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uchar fOutxCtsFlow: 1; /* Enable output xon/xoff with cts */
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uchar fOutxDsrFlow: 1; /* Enable output xon/xoff with dsr */
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uchar fDummy: 3;
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uchar fOutX: 1; /* Enable output X-ON/X-OFF */
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uchar fInX: 1; /* Enable input X-ON/X-OFF */
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uchar fPeChar: 1; /* Enable Parity Err Replacement */
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uchar fNull: 1; /* Enable Null stripping */
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uchar fChEvt: 1; /* Enable Rx character event. */
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uchar fDtrflow: 1; /* Enable DTR flow control */
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uchar fRtsflow: 1; /* Enable RTS flow control */
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uchar fDummy2: 1;
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char XonChar; /* Tx and Rx X-ON character */
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char XoffChar; /* Tx and Rx X-OFF character */
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ushort XonLim; /* Transmit X-ON threshold */
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ushort XoffLim; /* Transmit X-OFF threshold */
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char PeChar; /* Parity error replacement char */
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char EofChar; /* End of Input character */
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char EvtChar; /* Recieved Event character */
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ushort TxDelay; /* Amount of time between chars */
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} DCB;
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/*************************************************************************
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**
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** COMSTAT
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** Status record returned by GetCommError
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**
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*************************************************************************/
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typedef struct {
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uchar fCtsHold: 1; /* Transmit is on CTS hold */
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uchar fDsrHold: 1; /* Transmit is on DSR hold */
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uchar fRlsdHold: 1; /* Transmit is on RLSD hold */
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uchar fXoffHold: 1; /* Transmit is on X-Off hold */
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uchar fXoffSent: 1; /* Recieve in X-Off or DTR hold */
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uchar fEof: 1; /* End of file character found */
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uchar fTxim: 1; /* Character being transmitted */
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uchar fPerr:1; /* Printer error */ /*081985*/
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ushort cbInQue; /* count of characters in Rx Que*/
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ushort cbOutQue; /* count of characters in Tx Que*/
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} COMSTAT;
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/*************************************************************************
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**
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** DCB field definitions.
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**
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*************************************************************************/
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#define NOPARITY 0
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#define ODDPARITY 1
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#define EVENPARITY 2
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#define MARKPARITY 3
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#define SPACEPARITY 4
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#define ONESTOPBIT 0
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#define ONE5STOPBITS 1
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#define TWOSTOPBITS 2
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#define IGNORE 0 /* Ignore signal */
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#define INFINITE 0xffff /* Infinite timeout */
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/*************************************************************************
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**
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** Comm Device Driver Error Bits.
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**
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*************************************************************************/
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#define CE_RXOVER 0x0001 /* Receive Queue overflow */
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#define CE_OVERRUN 0x0002 /* Receive Overrun Error */
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#define CE_RXPARITY 0x0004 /* Receive Parity Error */
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#define CE_FRAME 0x0008 /* Receive Framing error */
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#define CE_CTSTO 0x0020 /* CTS Timeout */
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#define CE_DSRTO 0x0040 /* DSR Timeout */
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#define CE_RLSDTO 0x0080 /* RLSD Timeout */
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#define CE_PTO 0x0100 /* LPTx Timeout */ /*081985*/
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#define CE_IOE 0x0200 /* LPTx I/O Error */ /*081985*/
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#define CE_DNS 0x0400 /* LPTx Device not selected */ /*081985*/
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#define CE_OOP 0x0800 /* LPTx Out-Of-Paper */ /*081985*/
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#define CE_MODE 0x8000 /* Requested mode unsupported */
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/*************************************************************************
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**
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** Initialization Error Codes
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**
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*************************************************************************/
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#define IE_BADID -1 /* Invalid or unsupported id */
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#define IE_OPEN -2 /* Device Already Open */
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#define IE_NOPEN -3 /* Device Not Open */
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#define IE_MEMORY -4 /* Unable to allocate queues */
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#define IE_DEFAULT -5 /* Error in default parameters */
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#define IE_HARDWARE -10 /* Hardware Not Present */
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#define IE_BYTESIZE -11 /* Illegal Byte Size */
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#define IE_BAUDRATE -12 /* Unsupported BaudRate */
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/*************************************************************************
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**
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** Event mask definitions. Used by SetCommEventMask and GetCommEventMask
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**
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** RXCHAR - Set when any character is received and placed in the input
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** queue.
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** RXFLAG - Set when a particular character, as defined in the dcb, is
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** received and placed in the input queue.
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** TXEMPTY - Set when the last character in the transmit queue is
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** transmitted.
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** CTS - Set when the CTS signal changes state.
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** DSR - Set when the DSR signal changes state.
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** RLSD - Set when the RLSD signal changes state.
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** BREAK - Set when a break is detected on input.
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** ERR - Set when a line status error occurs.
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**
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*************************************************************************/
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#define EV_RXCHAR 0x0001 /* Any Character received */
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#define EV_RXFLAG 0x0002 /* Received certain character */
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#define EV_TXEMPTY 0x0004 /* Transmitt Queue Empty */
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#define EV_CTS 0x0008 /* CTS changed state */
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#define EV_DSR 0x0010 /* DSR changed state */
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#define EV_RLSD 0x0020 /* RLSD changed state */
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#define EV_BREAK 0x0040 /* BREAK received */
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#define EV_ERR 0x0080 /* Line Status Error Occurred */
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#define EV_RING 0x0100 /* Ring signal detected */
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#define EV_PERR 0x0200 /* LPTx error occured */ /*081985*/
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/*************************************************************************
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**
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** Extended Functions
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**
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** SETXOFF - Causes transmit to behave as if an X-OFF character had
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** been received. Valid only if transmit X-ON/X-OFF specified
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** in the dcb.
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** SETXON - Causes transmit to behave as if an X-ON character had
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** been received. Valid only if transmit X-ON/X-OFF specified
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** in the dcb.
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*************************************************************************/
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#define SETXOFF 1 /* Set X-Off for output control */
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#define SETXON 2 /* Set X-ON for output control */
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#define SETRTS 3 /* Set RTS high */
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#define CLRRTS 4 /* Set RTS low */
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#define SETDTR 5 /* Set DTR high */
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#define CLRDTR 6 /* Set DTR low */
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#define RESETDEV 7 /* Reset device if possible */ /*081985*/
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#endif
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/* Escapes for comm */
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#define GETMAXLPT 8 /* Max supported LPT id */
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#define GETMAXCOM 9 /* Max supported COM id */
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#define GETBASEIRQ 10 /* Get port base & irq for a port */
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