cannot access /dev/ttyUSB0

Chip Platform Rockchip
1

Hi, I have a kobuki, and want connect it to rk3288(ubuntu) but , list usb serial can show ttyUSB0,
when i use cm: lsusb, I see kubuki device. but cant connect to serial port ttyUSB0.
please help.

error message:

ls: cannot access /dev/ttyUSB0: No such file or directory

2

Refer to the following step:
1.make menuconfig

select Device Drivers > USB support > USB Serial Converter support
USB CP210x family of UART Bridge Controllers
USB Prolific 2303 Single Port Serial Driver

change them to “M”

  1. run the following command to make module:
    make modules
    mkdir modules_install
    make INSTALL_MOD_PATH=./modules_install modules_install

3.copy cp210x.ko and pl2303.ko to firefly-rk3288 board from path(kernel/modules_install/lib/modules/3.10.0/kernel/drivers/usb/serial)
4.install ko file:
root@firefly:/mnt/ko# insmod pl2303.ko
root@firefly:/mnt/ko# insmod cp210x.ko

5.final you list the ttyUSB* in /dev/:
ls /dev/ttyUSB0
ttyUSB0

6.if wan to remove it ,just:
root@firefly:/mnt/ko# rmmod cp210x.ko
root@firefly:/mnt/ko# rmmod pl2303.ko

3

hi, thank for reply.
but i’m still got error :
ls: cannot access /dev/ttyUSB0: No such file or directory

4

kobuki chipset serial : FT232R - USB UART IC
so i need FT232R user serial ?

5

Ltd FT232 USB-Serial (UART)

when lsusb:

lsusb
Bus 002 Device 002: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

6

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