Сonnectthe adapter USB - RS232to the USB port computer.
Bus 004 Device 008: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x UART Bridge / myAVR mySmartUSB light
Tuned port /dev/ttyUSB0
stty -F /dev/ttyUSB0 raw speed 9600 -ixon cs8 -parenb -cstopb
Data transmissionworks fine in terminal or PuTYY but VISA Interactive Control gives an error message:
Error opening resource:
ASRL5::INSTR
VISA: (Hex 0xBFFF0000) Unknown system error (miscellaneous error).
Findlinks: http://forums.ni.com/t5/NI-Linux-Real-Time-Discussions/FTDI-USB-Serial-Adapter/td-p/3375153
and
http://forums.ni.com/t5/NI-myRIO/Using-USB-RS485-or-other-USB-to-COM-devices-on-myRIO/ta-p/3491726
[root@localhost dev]# chmod 666 ttyUSB0
crw-rw-rw-. 1 root dialout 188, 0 Nov 19 03:39 ttyUSB0
[root@localhost dev]# ln -s /dev/ttyUSB0 /dev/ttyS4
lrwxrwxrwx. 1 root root 12 Nov 19 02:15 ttyS4 -> /dev/ttyUSB0
In visaconf.ini
Name10="ASRL11::INSTR" Enabled10=1 Static10=1 SystemName10="/dev/ttyS4" BaudRate10=9600 DataBits10=8 Parity10=0 StopBits10=10 FlowCtrl10=0
Name4="ASRL5::INSTR"
Enabled4=1
Static4=1
SystemName4="/dev/ttyUSB0"
BaudRate4=9600
DataBits4=8
Parity4=0
StopBits4=10
FlowCtrl4=0
The problem (Unknown system error (miscellaneous error)) persists.
What to do next?