National Instruments PCI-232/4 用户手册

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, 

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<

port number> uart 

16550a port <

port address> irq <irq> 

^fourport

•

For a PCI-485 interface, which supports a higher 

baud_base

 of 

460.8K at startup, enter the following:

linux# setserial /dev/ttyS<

port number> uart 

16550a port <

port address> irq <irq> 

baud_base 460800 ^fourport 

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:

./intenable <

pci memory address 

found in lspci>

5.

If you have a PCI-485 interface, set the transceiver mode for each serial 
port. Refer to the section 

 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 

serialtest

 (from the 

PCI-SERIAL

 directory).

./serialtest <

receive port number> <transmit 

port number>