?? serknr.c
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/****************************************************************************
*****************************************************************************
serknr.c - Serial Routines, Kernighan and Ritchie Compatible
written for: Ascension Technology Corporation
PO Box 527
Burlington, Vermont 05402
802-655-7879
written by: Jeff Finkelstein
Modification History:
4/8/91 jf - created
4/9/91 jf - added COMPORT1 and COMPORT2 strings for DOS
4/13/91 jf - added system command for Com configuration
4/15/91 jf - simplified get_serial_record
4/23/91 jf - removed IO.h for KNR systems
jf - removed O_BINARY
4/30/91 jf - removed references to DOS.. SERKNR.c is no longer
DOS compatible..DOS is NOT capabable of reasonable
serial communication control!!!
11/3/92 jf - baudspeedbits now initialized to B9600 for UNIX
12/22/92 jf - updated for SGI compatibility..note that
get_serial_record has been modified to return
the most recent (newest) record from the BIRD
12/29/92 jf - moved all #ifdefs and #defines to column 1 for
compiler compatibility
1/8/93 jf - added DEBUG_VIEWSERIAL ifdefs to allow serial
characters received to appear on the console
jf - added DEBUG_SKIPSERIAL ifdefs to skip opening
and read/writes to the serial port if TRUE
1/12/93 jf - open now use O_NDELAY for all systems to disregard
the state of the Carrier Detect signal
1/31/93 jf - send_serial_cmd modified to be able to send out
rs232 to fbb commands to addr 30
<<<< Copyright 1990 Ascension Technology Corporation >>>>
*****************************************************************************
****************************************************************************/
#include <stdio.h> /* general I/O */
#include <string.h> /* for string commands */
#include "asctech.h" /* Ascension Technology Definitions */
#include "compiler.h" /* Compiler Definitions */
#include "menu.h" /* for user interaction */
#include "serial.h" /* Serial Definitions */
/*
Local Prototypes
*/
#ifdef KNR
int get_record();
#else
int get_record(short charsneeded, char * rxbufinptr, short checkphasebit);
#endif
/*
Descriptors for the COM ports
=============================
sys_com_config gets built at run time in configserial via strcpy and
strcat C library calls... the user MUST modify this code when compiling
on a UNIX platform using the proper /dev/tty driver
*/
#ifdef DOS
char * sys_com_port[2] ={"com1","com2"};
#define OPENPARAMS O_RDWR
#endif
/*
UNIX Platforms
*/
#ifdef UNIX
#ifdef UNIX_SGTTY
struct sgttyb oldcom_sgttyb; /* save the old com config */
struct sgttyb com_sgttyb; /* for the new com config */
#endif
#ifdef UNIX_TERMIO
struct termio oldcom_termio; /* save the old com config */
struct termio com_termio; /* for the new com config */
#endif
/*
COHERENT - PCAT/Compatible 386/486 Platform
--------
COHERENT defines the Com Ports as: /dev/com1*,/dev/com2*
Where, the l denotes interrupt mode, w/o Modem control
Use /dev/com*l for interrupts w/o Modem control
/dev/com*r for interrupts w/ Modem control
/dev/com*pl for polled mode w/o Modem control
/dev/com*pr for polled mode w/ Modem control
*/
#ifdef COHERENT
char * sys_com_port[2] ={"/dev/com1l","/dev/com2l"};
#define OPENPARAMS O_RDWR
#endif
/*
IBM AIX - For the Risc 6000 Platform (using the Berkley terminal
------- interface)
*/
#ifdef AIX
char * sys_com_port[2] ={"/dev/tty0","/dev/tty1"};
#define OPENPARAMS O_RDWR | O_NDELAY
#endif
/*
SUN SUNOS - For the SUN platform (using the TERMIO interface)
---------
*/
#ifdef SUNOS
char * sys_com_port[2] ={"/dev/ttyha","/dev/ttyhb"};
#define OPENPARAMS O_RDWR | O_NDELAY
#endif
/*
DEC ULTRIX - For the DEC Platforms (using the Berkley terminal
---------- interface)
*/
#ifdef ULTRIX
char * sys_com_port[2] ={"/dev/tty00","/dev/tty01"};
#define OPENPARAMS O_RDWR | O_NDELAY
#endif
/*
SGI IRIX - For the Silicon Graphics Platforms (using
-------- the TERMIO interface)
*/
#ifdef IRIX
char * sys_com_port[2] ={"/dev/ttyd1","/dev/ttyd2"};
#define OPENPARAMS O_RDWR
#endif
#endif
/*
Declare/Init the Variables
*/
short comport = COM1; /* holds the comport # */
/*
Baud Rates for 6DFOBs
*/
long baud = 9600L; /* holds the current baud rate */
long baudratetable[] = {115200L,
57600L,
38400L,
19200L,
9600L,
4800L,
2400L}; /* holds the baud rate selections */
/*
Setup a Table for the Baud Rate Bit Definition used when
setting up the Baud Rates via a call to IOCTL
*/
#ifdef UNIX
short baudspeedbits = B9600; /* holds the current bit definition */
short baudspeedbittable[] = {BAUDRATE_115200, /* CPU SPECIFIC */
BAUDRATE_57600, /* CPU SPECIFIC */
BAUDRATE_38400, /* CPU SPECIFIC */
B19200,
B9600,
B4800,
B2400}; /* holds the bitspeed definition */
#endif
/*
Use the Definitions from the BIOS INT14 function 0
*/
#ifdef DOS
short baudspeedbits = 7; /* holds the current bit definition */
short baudspeedbittable[] = {-1,
-1,
-1,
-1,
7,
6,
5}; /* holds the bitspeed definition */
#endif
int comhandle = -1; /* holds the comport handle */
short serialconfigsaved = FALSE; /* flag indicates serial port saved */
short phaseerror_count = 0; /* holds the phase errors */
short rxerrors = 0; /* holds the rx line errors */
/*
Define RS232 to FBB Global Address
*/
short rs232tofbbaddr = 0;
/*
configserialport - Configure the Serial Port connected to the BIRD
Prototype in: serial.h
Parameters Passed: void
Return Value: TRUE if successfull, else FALSE
Remarks:
*/
int configserialport()
{
#ifdef DEBUG_SKIPSERIAL
return(TRUE);
#else
#ifdef DOS
#ifdef RTSINCABLE
int com_base;
#endif
/*
Use BIOS INT 14 to setup the Serial Ports Baud Rate and Config
*/
#define SETSERIALINT 0x14 /* INT 14h */
union REGS regs; /* Use C's register emulation */
regs.h.ah = 0; /* set up for function 0 */
regs.h.al = (baudspeedbits << 5) | 3; /* MS 3 bits of AL = BAUD
LS 2 bits = 8 bit char */
regs.x.dx = comport; /* DX = comport # */
int86(SETSERIALINT,®s,®s); /* Do INT */
/*
NOTE: Enable the RTSINCABLE code if the RS232 cable connected
to the Host PC contains a connection for RTS...
RTS holds the Bird in RESET/STANDY and therefore the
DOS write times outs
*/
#ifdef RTSINCABLE
/*
Verify the comport and set the Base Address
*/
switch (comport)
{
case COM1:
com_base = COM1BASE; /* set the new I/O addr */
break;
case COM2:
com_base = COM2BASE; /* set the new I/O addr */
break;
default:
printf("\n** ERROR ** invalid COM port\n");
return(FALSE);
}
/*
Assert DTR...just in case the cable uses the DTR signal
Deassert RTS...else the system will reset
Dessert OUT2...needed to disable interrupts on PC compatible
serial I/O cards
*/
OUTPORTB(com_base + MODEMCONT, DTRON);
#endif
return(TRUE);
#endif
#ifdef UNIX_SGTTY
struct sgttyb tempcom_sgttyb;
/*
Get the Current Com Port Configuration
*/
if (ioctl(comhandle,TIOCGETP,&tempcom_sgttyb) >= 0)
{
/*
Set the New Baud Rate...input and output
*/
tempcom_sgttyb.sg_ispeed = baudspeedbits;
tempcom_sgttyb.sg_ospeed = baudspeedbits;
if (ioctl(comhandle,TIOCSETP,&tempcom_sgttyb) >= 0)
return(TRUE);
}
printf("\n\r** ERROR ** could not set the COM port Baud Rate\n\r");
return(FALSE);
#endif
#ifdef UNIX_TERMIO
struct termio tempcom_termio;
/*
Get the Current Com Port Configuration
*/
if (ioctl(comhandle,TCGETA,&tempcom_termio) >= 0)
{
/*
Set the New Baud Rate... don't smash the current CFLAG settings
*/
tempcom_termio.c_cflag |= baudspeedbits;
if (ioctl(comhandle,TCSETA,&tempcom_termio) >= 0)
return(TRUE);
}
printf("\n\r** ERROR ** could not set the COM port Baud Rate\n\r");
return(FALSE);
#endif
#endif /* DEBUG_SKIPSERIAL */
}
/*
saveserialconfig - save serial port configuration
Prototype in: serial.h
Parameters Passed: void
Return Value: void
Remarks: saves the current configuration of the serial port
*/
int saveserialconfig()
{
#ifdef DEBUG_SKIPSERIAL
return(TRUE);
#else
#ifdef UNIX
int zeroint = 0;
#endif
/*
if already opened, return FALSE
*/
if (comhandle != -1)
return(FALSE);
/*
Open the Comport for RD and WR and get a handle
*/
if ((comhandle = open(sys_com_port[comport], OPENPARAMS)) == -1)
{
printf("\n\r** ERROR ** could not open the COM port\n\r");
return(FALSE);
}
#ifdef UNIX_SGTTY
/*
Save the Current Com Port Configuration
*/
if (ioctl(comhandle,TIOCGETP,&oldcom_sgttyb) >= 0)
{
/*
Set the New configuration to RAW mode
*/
com_sgttyb.sg_flags = RAW;
if (ioctl(comhandle,TIOCSETP,&com_sgttyb) >= 0)
#ifdef ULTRIX
/*
Setup the TTY to NOT need the MODEM control Signal
*/
if (ioctl(comhandle,TIOCNMODEM,zeroint) >= 0)
{
/*
Setup for ignoring Carrier
*/
if (ioctl(comhandle,TIOCNCAR,zeroint) >= 0)
return(TRUE);
}
#else
return(TRUE);
#endif
}
}
/*
Put up the Error and return
*/
printf("** ERROR ** could not configure the COM port to RAW mode");
hitkeycontinue();
return(FALSE);
#endif
#ifdef UNIX_TERMIO
/*
Save the Current Com Port Configuration
*/
if (ioctl(comhandle,TCGETA,&oldcom_termio) >= 0)
{
/*
Setupt the new port configuration...NON-CANONICAL INPUT MODE
.. as defined in termio.h
*/
com_termio.c_iflag = XOFF;
com_termio.c_cflag = CS8 | CLOCAL | CREAD;
com_termio.c_lflag = 0;
com_termio.c_cc[VMIN] = 0; /* setup to return after 2 seconds */
com_termio.c_cc[VTIME] = 20; /* ..if no characters are received */
/* TIME units are assumed to be 0.1 secs */
if (ioctl(comhandle,TCSETA,&com_termio) >= 0)
{
return(TRUE);
}
}
/*
Put up the Error and return
*/
printf("** ERROR ** could not configure the COM port to RAW mode");
hitkeycontinue();
return(FALSE);
#endif
#ifdef DOS
return(TRUE);
#endif
#endif /* DEBUG_SKIPSERIAL */
}
/*
restoreserialconfig - Restore the original serial port configuration
Prototype in: serial.h
Parameters Passed: void
Return Value: void
Remarks: restores the configuration of the serial port
*/
void restoreserialconfig()
{
#ifdef DEBUG_SKIPSERIAL
return;
#else
/*
Restore the Com Port Configuration.. if already opened
*/
if (comhandle != -1)
{
#ifdef UNIX_SGTTY
ioctl(comhandle,TIOCSETP,&oldcom_sgttyb); /* restore config */
#endif
#ifdef UNIX_TERMIO
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