USB to Serial Problem.

GoogleGroups
1

Hi.

i connected USB to Seri cable to Beagleboard's USB Host. and at serial
side, i have a device sends data through to beagle. But in beagle
board i can not see datas. there are ttyS0- S3. But i can not see
ttyUSB0.

#dmesg

[ 1549.689636] usb 2-2.4: new full speed USB device using ehci-omap
and address 10
[ 1549.821563] usb 2-2.4: New USB device found, idVendor=0403,
idProduct=6001
[ 1549.828674] usb 2-2.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 1549.836242] usb 2-2.4: Product: FT232R USB UART
[ 1549.840942] usb 2-2.4: Manufacturer: FTDI
[ 1549.844970] usb 2-2.4: SerialNumber: A900ceMF

when i wrote
root@beagleboard:~# cat /dev/ttyS0

i can not see anything...!!!

2

yo have to look for /dev/ttyUSBx

2011/8/12 omeraygor <omeraygor@gmail.com>

3

this my my problem.

Usb to serial attached and ls /dev/tty

root@beagleboard:~# ls /dev/tty
/dev/tty /dev/tty16 /dev/tty24 /dev/tty32 /dev/tty40 /dev/
tty49 /dev/tty57 /dev/tty8
/dev/tty0 /dev/tty17 /dev/tty25 /dev/tty33 /dev/tty41 /dev/
tty5 /dev/tty58 /dev/tty9
/dev/tty1 /dev/tty18 /dev/tty26 /dev/tty34 /dev/tty42 /dev/
tty50 /dev/tty59 /dev/ttyS0
/dev/tty10 /dev/tty19 /dev/tty27 /dev/tty35 /dev/tty43 /dev/
tty51 /dev/tty6 /dev/ttyS1
/dev/tty11 /dev/tty2 /dev/tty28 /dev/tty36 /dev/tty44 /dev/
tty52 /dev/tty60 /dev/ttyS2
/dev/tty12 /dev/tty20 /dev/tty29 /dev/tty37 /dev/tty45 /dev/
tty53 /dev/tty61 /dev/ttyS3
/dev/tty13 /dev/tty21 /dev/tty3 /dev/tty38 /dev/tty46 /dev/
tty54 /dev/tty62
/dev/tty14 /dev/tty22 /dev/tty30 /dev/tty39 /dev/tty47 /dev/
tty55 /dev/tty63
/dev/tty15 /dev/tty23 /dev/tty31 /dev/tty4 /dev/tty48 /dev/
tty56 /dev/tty7

i can not find /dev/ttyUSBx....

The Angstrom works on Beagleboard. i hevent installed anything nor
changed.

4

Did you get any advance?
I've got a BeagleBoard from LiquidWare, with a pre-mounted Angstrom
and I have the exact same problem.

5 
> Usb to serial attached and ls /dev/tty
> i can not find /dev/ttyUSBx....

By default Angstrom does not include ftdi-sio and pl2303 USB-serial modules, which cover the majority of USB-to-serial devices lying around. You need to install them once using:

opkg install kernel-module-pl2303
opkg install kernel-module-ftdi-sio

Then reboot. You will find the /dev/ttyUSB0 files and /dev/serial/by-id/usb-* files.

If you only use one serial USB then you can go for /dev/ttyUSB0 but if you use more than one (for example an USB GPS and an USB weather station) then you need to rely on /dev/serial structure, because ttyUSB* assignment may not be in the same order at every reboot.

I have two different GPS units and an USB-to-serial acting as pl2303, and lots of other stuff (weather station, Arduinos,