/dev/ttyUSB0 missing after doing modprobe usbserial

[reddy]

hi ,

i was trying a serial communication between two am57xx board.

1) i tried cdc-acm as host contoller driver by doing modprobe cdc-acm i was able to get /dev/ttyACM0. no issue in this case.

2) now iam trying same but instead of cdc-acm now iam using Generic USB Serial Driver. so for that

iam doing modprobe usbserial ----> on one am57xx processor

and modprobe g-serial ---> on another am57xx processor

But in /dev iam not getting /dev/ttyUSB0 on host side. am i missing something here. please let me know quick responses really appreciable, on where iam going wrong !!!

thanks in advance!!

 

[NorthWest]

You could consider creating the device:

mknod -m 666 /dev/ttyUSB0 c 188 0

and see if that helps.

 

[reddy]

mknod -m 666 /dev/ttyUSB0 c 188 0

hi ,
thanks for ur reply , i tried that before it create the node but when i try to use it throws an error "can't open '/dev/ttyUSB0': No such device or address"

 

[NorthWest]

I guess that means that the kernel cannot see the device. What comes to mind is to have a look at what usb serial devices the kernel supports at: https://www.kernel.org/doc/html/latest/usb/usb-serial.html.