National Instruments and PCI-485/4 Isolated 用户手册

Enter the following to recompile 

FIFOtrigger_pci.c

 and rerun 

FIFOtrigger

. Also, the source code for 

FIFOtrigger

 is available for 

editing and viewing at 

FIFOtrigger_pci.c

 provided in the 

PCI-SERIAL

 directory.

gcc -O FIFOtrigger_pci.c -o 

FIFOtrigger

./FIFOtrigger <

port number> 

<

rx_trigger> <tx_trigger>

Enter the following to recompile 

rs485.c

. Also, the source code for 

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

Enter the following to recompile 

clock_speed.c

 and rerun 

clockspeed

. Also, the source code for 

clockspeed

 is available for 

editing and viewing at 

clock_speed.c

, provided in the 

PCI-SERIAL

 

directory.

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

linux PCI-SERIAL# ./clockspeed <

port number> <high/low>

Enter the following to recompile 

serialtest.c

 and rerun 

serialtest

. 

Also, the source code for 

serialtest

 is available for editing and viewing 

at 

serialtest.c

, provided in the 

PCI-SERIAL

 directory.

gcc serialtest.c -o serialtest

./serialtest <

receive port number> 

<

transmit port number>

Make sure the interface is seated correctly and tighten the screw 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).