root@gnublin:~/sources/c_program/serial# modprobe pl2303
usbcore: registered new interface driver usbserial
usbserial: USB Serial Driver core
USB Serial support registered for pl2303
usbcore: registered new interface driver pl2303
pl2303: Prolific PL2303 USB to serial adaptor driver
root@gnublin:~/sources/c_program/serial# lsmod
Module                  Size  Used by
pl2303                 13148  0
usbserial              24120  1 pl2303
pegasus                16772  0
mii                     3416  1 pegasus
root@gnublin:~/sources/c_program/serial# bin/rts /dev/ttyS1 1
upscheck: /dev/ttyS1: No such device or address