National Instruments PCI-232-4, PCI-232-2, PCI-485-8, PCI-232-8, PCI-485-4 User Manual

...

NOTE TO USERS

SING

PCI S

ERIAL WITH LINUX

This document contains instructions to help you install and configure the National Instruments serial hardware for Linux. This document includes information about the PCI-232/2, PCI-232/4, PCI-232/8, PCI-485/2, PCI-485/4, PCI-485/8, PCI-232/2 Isolated, PCI-232/4 Isolated, PCI-485/2 Isolated, and PCI-485/4 Isolated interfaces.

This document assumes that you are already familiar with Linux.

Related Documentation............................... ............................................2

Contributions...................................................................................2

Gather What You Need to Get Started....................................................2

Quick Start..............................................................................................4

Setup........................................................................................................5

Create Devices.................................................................................5

MAKEDEV Example...............................................................5

Find Interface Information...............................................................5

Assign Serial Driver.........................................................................6

setserial Example......................................................................7

Assign Serial Drivers Using PCI-485.......................................7

Assign Serial Drivers Using PCI Eight-Port Interfaces............7

Enable PCI Interrupt........................................................................7

Configuration..........................................................................................8

View Your Hardware Resources.....................................................8

Enable FIFO Buffers........................................................................8

FIFO Example..........................................................................9

Configure struct termios..................................................................9

Configure PCI-485..................................................................................10

Select Transceiver Mode.................................................................10

rs485 Example..........................................................................10

Lower Baud Rate Selection.............................................................10

Test the Setup..........................................................................................11

natinst.com™, National Instruments™, and NI-Serial™ are trademarks of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies.

Troubleshooting and Common Questions...............................................12

Error Codes.......................................................................................12

Common Questions..........................................................................13

Assign Driver....................................................... ....................................15

Sample /etc/rc.d/rc.serial File............................ .. ....................................17

Gather What You Need to Get Started

Before you install your PCI serial interface for Linux, make sure you have the following:

• Linux kernel version 2.2.3 or later. The product has been thoroughly

tested with kernel version 2.2.3; howe ver , the product might work with

earlier kernel versions.

If you do not have kernel version 2.2.3 or later, or if you do not have

the following options already compiled into your kernel, you need to

recompile you kernel. Include the following options when you

configure and recompile the kernel using

Using PCI Serial with Linux 2 www.natinst.com

make menuconfig.

a. General Setup

– PCI Support –PCI Quirks – Backward-compatible

/proc/pci

b. Character Devices

– Standard/generic dumb serial support – Extended dumb serial driver options – Support more than four serial ports – Support for sharing serial interrupts

•

setserial 2.14 or later. To find the version of setserial

enter the

following:

linux# setserial –V

• PCI Utilities 1.10 or later. You can download PCI Utilities 1.10 from

ftp://metalab.unc.edu/pub/Linux/hardware

• PCI-SERIAL.tar.gz. You can download this file from the National Instruments FTP site at

ind_comm/serial/linux/

ftp://ftp.natinst.com/support/

After you have the file, extract and unzip it by entering the following:

linux# tar zxvf PCI-SERIAL.tar.gz

The tar command extracts and unzips PCI-SERIAL.tar.gz and creates the sub-directory

PCI-SERIAL. Enter the following to make

sure all necessary files are included:

linux# cd PCI-SERIAL linux PCI-SERIAL# ls

FIFOtrigger intenable serialtest FIFOtrigger_pci.c interrupt_enable.c serialtest.c Clock_speed.c rs485 termios_program.c clockspeed rs485.c

• Configure your BIOS to include a Plug and Play aware OS.

• You need superuser privileges to do most of the steps and program segments in this document.

Quick Start

This section is for experienced Linux users who are familiar with the

lspci and setserial tools. If you are not familiar with either of these

tools or if you require a detailed explanation of the steps, skip to the next section, Setup.

1. If you do not have enough available serial devices (

/dev/ttyS*) for

each port on your multiport interface, create a new serial device by entering the following:

linux# cd /dev linux /dev# ./MAKEDEV ttyS<

port number

2. Find the port address, IRQ, and memory assignment of your PCI serial interface by enter the following:

linux# lspci -v -n -d 1093:*

3. Assign the serial driver to your devices. Make sure you precede the port addresses with

0x.

• For a PCI-232 interface, enter the following:

linux# setserial /dev/ttyS<

16550a port < ^fourport

port address

port number

> irq <

> uart

irq

• For a PCI-485 interface, which supports a higher baud_base of

460.8K at startup, enter the following:

linux# setserial /dev/ttyS<

16550a port < baud_base 460800 ^fourport

port address

port number

> irq <

> uart

irq

4. Enable the PCI interrupt on your interface. To use intenable (from the

PCI-SERIAL directory) to enable interrupts on your PCI serial

interface, enter the following:

linux PCI-SERIAL# ./intenable <

found in lspci

pci memory address

5. If you have a PCI-485 interface, set the transcei ver mode for each serial port. Refer to the section Select Transceiver Mode for more information about selecting a PCI-485 transceiver mode.

6. After you connect a cable between the two ports, test the setup by running

linux# ./serialtest <

serialtest (from the PCI-SERIAL directory).

port number

receive port number

> <

transmit

Using PCI Serial with Linux 4 www.natinst.com

Setup

Create Devices

After you install the serial hardware (as shown in your PCI serial getting started manual), follow these steps to set up the interface.

Create a device for each port on your multiport interface. You only need to do this step once. Port address is the I/O address of the device, and port number is the device/serial port number of the port. Port number is used in the following context: your computer are typically named from port number you choose needs to be four or greater.

ttyS<

port number

/dev/ttyS0 to /dev/ttyS3, the

>. Since serial ports built into

Enter the each serial port on the interface by entering the following.

linux# cd /dev linux /dev# ./MAKEDEV ttyS<

MAKEDEV Example

Enter the following to make the devices for a two-port interface:

linux# cd /dev linux /dev# ./MAKEDEV ttyS4 linux /dev# ./MAKEDEV ttyS5

Find Interface Information

Follow these instructions to find the port address, IRQ, and memory assignment of your PCI serial interface.

Note

Repeat this section each time you add another interface or physical device to the

computer.

Note

This step may be done in normal user mode.

1. Use with the device codes as numbers), and the information only on devices with a National Instruments Vendor ID of 1093), to find the resource information of your serial interface.

linux# lspci -v -n -d 1093:*

Something similar to the following should appear. In this output, the IRQ is 11; the memory location is 0xdff80, and the port addresses are 0xdff0 and 0xdfe0.

/dev directory , then use the MAKEDEV script to create a de vice for

port number

lspci (a command that displays information about the PCI bus)

-v option (be verbose), the -n option (show PCI vendor and

-d 1093:* option (display

Note PCI Eight-Port Users—The PCI eight-port interfaces show only one I/O port

address listing. The addresses of the other seven I/O ports are calculated b y adding eight to the previous port address, (n × 8 + I/O port) for 0 < n < 8. The something similar to the following:

Assign Serial Driver

Note You need to repeat this step each time you restart your computer or until you set up

your

/etc/rc.d/rc.serial file. (Refer to the section Sample /etc/rc.d/rc.serial File for

more information on setting up the

00:0a.0 Class ff00: 1093:d140 (rev 01)

Flags: medium devsel, IRQ 11

Memory at 000dff80 (low-1M, non-prefetchable) I/O ports at dff0 I/O ports at dfe0

Write down the IRQ, memory location, and all the I/O port addresses for your computer.

lspci call displays

00:0a.0 Class ff00: 1093:d150 (rev 01)

Flags: medium devsel, IRQ 11

Memory at 000dff80 (low-1M, non-prefetchable)

I/O ports at df00

Assign the serial driver to your devices.

/etc/rc.d/rc.serial file.)

Enter the following to use UART, port address, and IRQ. Use information returned from the output, and remember to precede the port address with

linux# setserial /dev/ttyS<

port <

Note

The ^fourport flag is required regardless of how many ports you have on your

interface. The

^fourport flag tells the serial driver that you are not using an AST

setserial to tell the kernel each device’s

port address

port number

> irq <

irq

> uart 16550A

> ^fourport

lspci

0x.

four-port interface.

Caution Using an invalid port can lock up your machine.

setserial Example

Enter the following to assign the serial driver to your devices for the values in the above two-port

linux# setserial /dev/ttyS4 uart 16550A port 0xdff0 irq

11 ^fourport

Using PCI Serial with Linux 6 www.natinst.com

lscpi output:

linux# setserial /dev/ttyS5 uart 16550A port 0xdfe0 irq

11 ^fourport

Assign Serial Drivers Using PCI-485

Since the PCI-485 supports a higher baud_base of 460.8K at start-up, also enter the following at the linux prompt:

linux# setserial /dev/ttyS< 460800

port number

> baud_base

For example, enter the following to assign the serial dri ver to /dev/ttyS4 for a PCI-485 serial port at port address 0xdfe0 and IRQ 11.

linux# setserial /dev/ttyS4 uart 16550A port 0xdfe0 irq

11 ^fourport

linux# setserial /dev/ttyS4 baud_base 460800

Assign Serial Drivers Using PCI Eight-Port Interfaces

Enter the following to assign the serial driver to your devices for the PCI eight-port and are separated by exactly 8 bytes.

linux# setserial /dev/ttyS4 uart 16550A port 0xdf00 irq 11 ^fourport linux# setserial /dev/ttyS5 uart 16550A port 0xdf08 irq 11 ^fourport linux# setserial /dev/ttyS6 uart 16550A port 0xdf10 irq 11 ^fourport linux# setserial /dev/ttyS7 uart 16550A port 0xdf18 irq 11 ^fourport linux# setserial /dev/ttyS8 uart 16550A port 0xdf20 irq 11 ^fourport linux# setserial /dev/ttyS9 uart 16550A port 0xdf28 irq 11 ^fourport linux# setserial /dev/ttyS10 uart 16550A port 0xdf30 irq 11 ^fourport linux# setserial /dev/ttyS11 uart 16550A port 0xdf38 irq 11 ^fourport

lspci output. Notice that the entries for port are consecutive

Enable PCI Interrupt

To enable the PCI interrupt on your serial interface, use intenable, provided in the restart your computer. If you have more than one PCI serial interface, rerun

intenable with another PCI memory address specified in the command

line. Enter the following to use

PCI-SERIAL directory. Run intenable each time you

intenable:

linux PCI-SERIAL# ./intenable <

For example, enter the following to enable interrupts for a PCI serial interface with memory at 0x000dff80:

linux PCI-SERIAL# ./intenable dff80

Configuration

View Your Hardware Resources

To see what system resources your serial interface is using, use the

setserial command, as follows: linux# setserial -gv /dev/ttyS<

For the lspci and setserial examples, something similar to the following should appear:

/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4 /dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3 /dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4 /dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3 /dev/ttyS4, UART: 16550A, Port: 0xdff0, IRQ: 11 /dev/ttyS5, UART: 16550A, Port: 0xdfe0, IRQ: 11

in lspci

PCI memory address found

port number

Enable FIFO Buffers

Use FIFOtrigger (from the PCI-SERIAL directory) to enable the receive and transmit FIFOs and to set the trigger levels of these FIFOs.

FIFOtrigger enables the FIFO of only one serial port. T o enable the FIFO

for your other serial ports, rerun number specified in the command line. Enter the following to use

FIFOtrigger: linux PCI-SERIAL#./FIFOtrigger <

rx_trigger

Using PCI Serial with Linux 8 www.natinst.com

FIFOtrigger with a different serial port

port number

> <

tx_trigger

Table 1.

tx_trigger Values

Transmit FIFO Trigger Level tx_trigger

8 0x00 16 0x10 32 0x20 56 0x30

Receive FIFO Trigger Level rx_trigger

The hardware issues a transmit empty interrupt when the number of characters in the transmit FIFO falls below the trigger level. Also, the hardware issues a receive full interrupt when the number of characters in the receive FIFO rises above the trigger level. For more information on FIFO buffers, refer to your PCI serial getting started manual.

FIFO Example

Enter the following to set the receive FIFO trigger level to 56 and the transmit trigger level to 32 for

linux PCI-SERIAL# ./FIFOtrigger 5 0x80 0x20

Configure struct termios

Every serial port has an associated struct termios. By using this

struct termios in a program, you can set the baud rate, character size

(number of data bits), parity, control characters, flow control, and input and output mode. For more information about the termios structure, refer to the

termios man page. To view the termios man page, enter the

following:

linux# man termios

Table 2.

rx_trigger Values

8 0x00 16 0x40 56 0x80 60 0xC0

/dev/ttyS5:

To configure your serial port, use a program segment similar to the

termios_program.c in your PCI-SERIAL directory.

Configure PCI-485

If you are using a PCI-485 interface, you can select the transceiver mode for each device and select the lower baud rates listed in

termios_program.c provided in your PCI-SERIAL directory.

Select Transceiver Mode

Use the rs485 program (from the PCI-SERIAL directory) to select the transceiver mode. To set the transceiver mode for other serial ports, rerun different serial port number specified in the command line. For more information on the transceiver control modes, refer to your serial getting started manual. If you do not know which transceiver mode to use, choose Four-Wire Mode.

rs485 sets the transceiver mode for only one serial port.

rs485 with a

Transceiver Mode Mode

Four-Wire Mode 0 Two-Wire Mode: DTR with echo 1 Two-Wire Mode: DTR controlled 2 Two-Wire Mode: TXRDY auto

control

Enter the following to use

linux PCI-SERIAL# ./rs485 <

rs485 Example

Enter the following to select Four-Wire Mode for /dev/ttyS5:

linux PCI-SERIAL# ./rs485 5 0

Lower Baud Rate Selection

To use a baud rate lower than 200, use setserial and the clockspeed program (from the single serial port from 460800 to 115200. After changing the baud base to 115200, the max baud rate you can achieve is 115200 baud (until you change the baud base back to 460800).

Table 3.

PCI-SERIAL directory) to lower the baud base of a

Transceiver Mode Values

rs485:

port number

> <

mode

After you change the run the your programs. The

Using PCI Serial with Linux 10 www.natinst.com

clockspeed program, you can use the lower baud rate flags in

baud_base of the serial port using setserial and

clockspeed program changes the baud base of only

Test the Setup

one serial port. To change the baud base of your other serial ports, rerun

clockspeed with a different serial port number specified in the command

line. Enter the following to set the baud base. (In this example, high equals a baud base of 460800 and low equals a baud base of 115200):

linux# setserial /dev/ttyS< linux PCI-SERIAL#./clockspeed <

"low"

port number

> baud_base 115200

> <

"high" or

For example, enter the following to select a baud base of 115200 for

/dev/ttyS4 and for /dev/ttyS5:

linux# setserial /dev/ttyS4 baud_base 115200 linux# setserial /dev/ttyS5 baud_base 115200 linux PCI-SERIAL# ./clockspeed 4 low linux PCI-SERIAL# ./clockspeed 5 low

Enter the following to change the baud base back to 460800 for

/dev/ttyS4 and for /dev/ttyS5:

linux# setserial /dev/ttyS4 baud_base 460800 linux# setserial /dev/ttyS5 baud_base 460800 linux PCI-SERIAL# ./clockspeed 4 high linux PCI-SERIAL# ./clockspeed 5 high

After you connect the cables to the port (as shown in your PCI serial getting started manual), run the

serialtest program (from the PCI-SERIAL

directory) to verify your setup. Make sure you specify two different ports for the

serialtest program, as shown in the following:

linux PCI-SERIAL# ./serialtest <

transmit port number

receive port number

If the test is successful, it displays a SUCCESS message. If the test hangs, press <ctrl-c> to exit the program, and continue to the next section,

Troubleshooting and Common Questions.

To test

/dev/ttyS4 and /dev/ttyS5, connect a cable between the

two ports and enter the following:

linux PCI-SERIAL# ./serialtest 4 5

Troubleshooting and Common Questions

Error Codes

This section lists possible error codes and solutions.

Error Code /dev/ttyS< Solution The /dev/ttyS<

port number

>: no such file or directory

> does not exist in the /dev directory . Enter the

following to create the device:

linux# cd /dev linux /dev# ./MAKEDEV ttyS<

port number

Error Code Couldn't change i/o privilege level: Operation not permitted Solution The program requires superuser privileges. Either exit and log in as root, or enter

the following:

linux$ su Password: < linux# <

enter the root password

run the program

Error Code setserial: Cannot set serial info: Address already in use Solution Make sure you are entering the correct port address into setserial. Also, make

sure you are entering

linux# setserial /dev/ttyS<

0x<

port address

0x if you are specifying a hex number.

port number

> irq <

irq

> ^fourport

> uart 16550a port

Error Code intenable: Can't open /dev/mem: Permission denied Solution The program requires superuser privileges. Either exit and log in as root, or enter

the following:

linux$ su Password: < linux# ./intenable <

Using PCI Serial with Linux 12 www.natinst.com

enter the root password

PCI memory

Error Code intenable: ERROR: Initial value of interrupt enable register

not equal to 0xC0C

Solution Make sure that you are providing the program with the correct memory address.

Enter the following to check for the memory address:

linux# lspci -v -n -d 1093:*

00:0a.0 Class ff00: 1093:d150 (rev 01) Flags: medium devsel, IRQ 11

Enter this address! -->Memory at 000dff80 non-prefetchable)

I/O ports at dff0 I/O ports at dfe0 I/O ports at dfa8 I/O ports at dfa0

linux# ./intenable dff80

(low-1M,

Error Code rs485: ERROR: Couldn't write to /dev/ttyS<

scratch register

port number

Solution Make sure the device was configured correctly in setserial. Enter the

following:

linux# setserial -gv /dev/ttyS< /dev/ttyS4, UART: 16550A, Port: 0xdff0, IRQ: 11

port number

If the port listing does not match the one found by lspci, reconfigure the device by entering the following:

linux# setserial /dev/ttyS<

port

> irq <

irq

port number

> ^fourport

> uart 16550a port

Common Questions

What do I do if intenable does not work immediately or causes a segmentation fault?

Enter the following to recompile

intenable. Also, the source code for intenable is available for editing

and viewing at

interrupt_enable.c provided in the PCI-SERIAL

directory.

linux PCI-SERIAL# gcc interrupt_enable.c -o intenable linux PCI-SERIAL# ./intenable <

in lspci

interrupt_enable.c and rerun

PCI memory address found

>'s

What do I do if FIFOtrigger does not work immediately or causes a segmentation fault?

Enter the following to recompile

FIFOtrigger. Also, the source code for FIFOtrigger is available for

editing and viewing at

PCI-SERIAL directory.

linux PCI-SERIAL# gcc -O FIFOtrigger_pci.c -o

linux PCI-SERIAL# ./FIFOtrigger <

FIFOtrigger_pci.c provided in the

FIFOtrigger

FIFOtrigger_pci.c and rerun

port number

rx_trigger

> <

tx_trigger

What do I do if rs485 does not work immediately?

Enter the following to recompile

rs485 is available for editing and viewing at rs385.c, provided in the PCI-SERIAL directory.

linux PCI-SERIAL# gcc -O rs485.c -o rs485

rs485.c. Also, the source code for

What do I do if clockspeed does not work immediately or if it causes a segmentation fault?

Enter the following to recompile

clockspeed. Also, the source code for clockspeed is available for

editing and viewing at

clock_speed.c, provided in the PCI-SERIAL

clock_speed.c and rerun

directory.

linux PCI-SERIAL# gcc -O clock_speed.c -o clockspeed linux PCI-SERIAL# ./clockspeed <

port number

> <

high/low

What do I do if serialtest does not work immediately or if it causes a segmentation fault?

Enter the following to recompile Also, the source code for at

serialtest.c, provided in the PCI-SERIAL directory.

linux PCI-SERIAL# gcc serialtest.c -o serialtest linux PCI-SERIAL# ./serialtest <

serialtest is available for editing and viewing

serialtest.c and rerun serialtest.

receive port number

transmit port number

What do I do if serialtest hangs?

Make sure the interface is seated correctly and tighten the scre w that holds the interface in place. Also, make sure the cables are attached to the correct ports. In some cases,

serialtest hangs if the transceiver modes

(PCI-485) are not set. Try setting both transmit and receive ports to transceiver mode 0 (Four-Wire Mode).

Using PCI Serial with Linux 14 www.natinst.com

linux# ./rs485 < linux# ./rs485 < linux# ./serialtest <

number

transmit port number receive port number

receive port number

> 0

> <

transmit port

What do I do if my ports are not communicating correctly and print strange characters?

Make sure the baud rate, character size, clock speed (if PCI-485) and parity are the same for both the receiver and transmitter. Also make sure the transceiver modes (PCI-485) have been selected for both transceivers.

Assign Driver

How can I use

/dev/ttyS3 as National Instruments serial ports?

/dev/ttyS0, /dev/ttyS1, /dev/ttyS2, or

Check for available serial devices by entering the following:

linux# setserial -gv /dev/ttyS* /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4

/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3 /dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4 /dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3

Devices labeled with UART: unknown are available for use. To designate the available device when using

linux# setserial /dev/ttyS<

port 0x<

port address

setserial, enter the following:

port number

> irq <

> uart 16550a

irq

> ^fourport

Use these instructions to automatically assign the driver at startup using

/etc/rc.d/rc.serial.

You should not change the

/etc/rc.d/rc.serial file until you have

your serial interfaces installed and configured. If you add another de vice or interface to your computer, and your also change

/etc/rc.d/rc.serial.

lspci output changes, make sure you

Depending on your Linux distribution, you might not have an directory. In this case, your

/etc/rc.serial. If you do not ha ve /etc/rc.d/, replace the references

/etc/rc.d/ with /etc/. If you are using a Debian distribution, replace

the references to

/etc/rc.boot/0setserial.

/etc/rc.d/rc.serial with

rc.serial would be located under

/etc/rc.d/

For more information about using setserial, refer to linux # more

/usr/doc/setserial*/README

1. Enter the following:

linux# cp /usr/doc/setserial*/rc.serial /etc/rc.d / linux# pico /etc/rc.d/rc.serial

a. Make sure that SETSERIAL= points to the correct location. Check

your

/bin and /sbin directories, and change the SETSERIAL=

line to say either

SETSERIAL=/sbin/setserial

SETSERIAL=/bin/setserial or

b. Under AUTOMATIC CONFIGURATION, leave the following lines

uncommented and delete or comment out (by adding a # to the beginning of the line) all the other lines in the section. (Depending on your version of

AUTO_IRQ=auto_irq ${SETSERIAL} /dev/cua0 ${AUTO_IRQ} skip_test

autoconfig ${STD_FLAGS} ${SETSERIAL} /dev/cua1 ${AUTO_IRQ} skip_test

autoconfig ${STD_FLAGS} ${SETSERIAL} /dev/cua2 ${AUTO_IRQ} skip_test

autoconfig ${STD_FLAGS} ${SETSERIAL} /dev/cua3 ${AUTO_IRQ} autoconfig

${STD_FLAGS}

setserial, ttyS might replace cua):

c. Under MANUAL CONFIGURATION, comment out or delete

everything but the following lines. Change the lines concerning

/dev/cua4-/dev/cua(4+n) (where

is the number of ports on

the PCI serial interface) to the following:

# These are the first set of AST Fourport ports # ${SETSERIAL} /dev/ttyS4 uart 16550A port <

address

${SETSERIAL} /dev/ttyS5 uart 16550A port <

address

${SETSERIAL} /dev/ttyS6 uart 16550A port <

address

${SETSERIAL} /dev/ttyS7 uart 16550A port <

address

> irq <

irq

> ^fourport

irq

> ^fourport

irq

> ^fourport

irq

> ^fourport

port

Refer to the section Sample /etc/rc.d/rc.serial File for an example (configured according to the

lspci example above).

2. Enter the following:

linux# pico /etc/rc.d/rc

Using PCI Serial with Linux 16 www.natinst.com

3. Add the following segment to the end of the file (not necessary for Debian distribution):

if [ -f /etc/rc.d/rc.serial ]; then

sh /etc/rc.d/rc.serial fi

Sample /etc/rc.d/rc.serial File

# # /etc/rc.d/rc.serial # Initializes the serial ports on your system # # Distributed with setserial version 2.14 #

# Standard flags you want your serial devices to have # Examples: SAK, pgrp_lockout, session_lockout # STD_FLAGS="session_lockout"

SETSERIAL=/bin/setserial

echo -n "Configuring serial ports...."

# Do wild interrupt detection # ${SETSERIAL} -W /dev/cua0

############################################################### # # AUTOMATIC CONFIGURATION # ###############################################################

# Do AUTOMATIC_IRQ probing # AUTO_IRQ=auto_irq

# These are the standard COM1 through COM4 devices # # ${SETSERIAL} /dev/cua0 ${AUTO_IRQ} skip_test autoconfig ${STD_FLAGS} ${SETSERIAL} /dev/cua1 ${AUTO_IRQ} skip_test autoconfig ${STD_FLAGS} ${SETSERIAL} /dev/cua2 ${AUTO_IRQ} skip_test autoconfig ${STD_FLAGS} ${SETSERIAL} /dev/cua3 ${AUTO_IRQ} autoconfig ${STD_FLAGS}

############################################################### # # MANUAL CONFIGURATION # ###############################################################

# Changed for the two-port PCI-SERIAL interface. # ${SETSERIAL} /dev/ttyS4 uart 16550A port 0xdff0 irq 11 ^fourport ${SETSERIAL} /dev/ttyS5 uart 16550A port 0xdfe0 irq 11 ^fourport

########################################################### # # Print the results of the serial configuration process # ###########################################################

echo "done." ${SETSERIAL} -bg /dev/cua? /dev/cua??

Using PCI Serial with Linux 18 www.natinst.com

National Instruments PCI-232-4, PCI-232-2, PCI-485-8, PCI-232-8, PCI-485-4 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Related Documentation

Contributions

Gather What You Need to Get Started

Quick Start

Setup

Create Devices

MAKEDEV Example

Find Interface Information

Assign Serial Driver

setserial Example

Assign Serial Drivers Using PCI-485

Assign Serial Drivers Using PCI Eight-Port Interfaces

Enable PCI Interrupt

Configuration

View Your Hardware Resources

Enable FIFO Buffers

FIFO Example

Configure struct termios

Configure PCI-485

Select Transceiver Mode

rs485 Example

Lower Baud Rate Selection

Test the Setup

Troubleshooting and Common Questions

Error Codes

Common Questions

Assign Driver

Sample /etc/rc.d/rc.serial File