Hello,

 

I am using a 4 port ftdi chip TYPE_4232H. When I plug in my ftdi4232H
hardware I see 4 new devices, /dev/ttyUSB0, /dev/ttyUSB1, /dev/ttyUSB2 and
/dev/ttyUSB3.

 

After I run an application using libftdi such as the example "simple.c" I
find /dev/ttyUSB0 has disappear. If I unplug, then plugin the ftdi4232H
hardware all four /dev/ttyUSBn device come back.

 

Dmesg shows:

ftdi_sio 2-2.2:1.0: disconnect by usbfs

ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from
ttyUSB0

ftdi_sio 2-2.2:1.0: device disconnected

 

How do I use libftdi without disconnecting the serial device convertor from
ttyUSB0?

 

Regards

Michael

 



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