High Voltage PS with RS-232 serial port

[Hasan SANSAR via Tech-talk <tech-talk at aps.anl.gov>]

Hi all,

We were using Glassman's HVPS with RS-232 serial port connection diretcly on CentOS 7.4 on MOXA DA-682A. And I updated CentOS to 7.9. after that MOXA PC started to not recognizing RS-232 serial connection. So, we are using High Voltage PS with TCP/IP converter  for temporary reason.

I'm getting same error in here at tech-talk discussion:
https://epics.anl.gov/tech-talk/2013/msg01079.php

> drvAsynSerialPortConfigure("L0","/dev/ttyS0",0,0,0)
> asynSetOption("L0", -1, "baud", "9600")
> setOption failed tcsetattr failed: Input/output error

How can I solve this problem and how can I connect to this device over RS-232 port again?

I'm sending related outputs.

cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:unknown port:000003F8 irq:4
1: uart:unknown port:000002F8 irq:3
2: uart:unknown port:000003E8 irq:4
3: uart:unknown port:000002E8 irq:3

setserial -g /dev/ttyS*
/dev/ttyS0, UART: unknown, 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


dmesg | grep -i serial
[    0.751565] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.762749] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.762758] usb usb1: SerialNumber: 0000:00:1a.0
[    0.772736] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.772746] usb usb2: SerialNumber: 0000:00:1d.0
[    0.773169] usbcore: registered new interface driver usbserial_generic
[    0.773178] usbserial: USB Serial support registered for generic
[    1.199220] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    1.209093] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    1.581100] usb 2-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[  913.479311] serial8250_startup: 27 callbacks suppressed
[  918.484318] serial8250_startup: 81 callbacks suppressed
[  923.489534] serial8250_startup: 93 callbacks suppressed
[  928.489930] serial8250_startup: 96 callbacks suppressed
[  933.571884] serial8250_startup: 96 callbacks suppressed
[  938.633870] serial8250_startup: 75 callbacks suppressed
[ 1148.826783] serial8250_startup: 44 callbacks suppressed
[251734.888666] serial8250_startup: 2 callbacks suppressed


dmesg | grep tty
[    0.000000] console [tty0] enabled
[250769.622609] ttyS0: LSR safety check engaged!
[251729.802651] ttyS0: LSR safety check engaged!
[251733.905599] ttyS0: LSR safety check engaged!
[251733.910846] ttyS0: LSR safety check engaged!
[251734.006180] ttyS0: LSR safety check engaged!

Best regards,
Hasan

-- 
Hasan Sansar