4 Jun
2013
4 Jun
'13
7:40 p.m.
Cannot open serial device /dev/ttyUSB0
I am getting this error message when I try to connect to my C155 phone and upload
hello_world.compalram.bin using this command:
./osmocon -p /dev/ttyUSB0 -m c155
../../target/firmware/board/compal_e99/hello_world.compalram.bin
Even though device ttyUSB0 exists in my /dev/ directory, and I have set modprobe cp210x,
and chmod 777 /dev/ttyUSB0.
Here is an output from dmesg:
[ 105.110818] usb 6-3: USB disconnect, device number 2
[ 105.111098] cp210x ttyUSB0: cp210x converter now disconnected from ttyUSB0
[ 105.111131] cp210x 6-3:1.0: device disconnected
[ 113.728075] usb 6-3: new full speed USB device number 3 using ohci_hcd
[ 113.901042] cp210x 6-3:1.0: cp210x converter detected
[ 114.040085] usb 6-3: reset full speed USB device number 3 using ohci_hcd
[ 114.206030] usb 6-3: cp210x converter now attached to ttyUSB0
Here is an output from ls -l /dev/tty :
crw-rw-rw- 1 root tty 5, 0 2013-06-04 21:27 /dev/tty
crw--w---- 1 root tty 4, 0 2013-06-04 20:40 /dev/tty0
crw------- 1 root root 4, 1 2013-06-04 20:40 /dev/tty1
crw--w---- 1 root tty 4, 10 2013-06-04 20:40 /dev/tty10
crw--w---- 1 root tty 4, 11 2013-06-04 20:40 /dev/tty11
crw--w---- 1 root tty 4, 12 2013-06-04 20:40 /dev/tty12
crw--w---- 1 root tty 4, 13 2013-06-04 20:40 /dev/tty13
crw--w---- 1 root tty 4, 14 2013-06-04 20:40 /dev/tty14
crw--w---- 1 root tty 4, 15 2013-06-04 20:40 /dev/tty15
crw--w---- 1 root tty 4, 16 2013-06-04 20:40 /dev/tty16
crw--w---- 1 root tty 4, 17 2013-06-04 20:40 /dev/tty17
crw--w---- 1 root tty 4, 18 2013-06-04 20:40 /dev/tty18
crw--w---- 1 root tty 4, 19 2013-06-04 20:40 /dev/tty19
crw------- 1 root root 4, 2 2013-06-04 20:40 /dev/tty2
crw--w---- 1 root tty 4, 20 2013-06-04 20:40 /dev/tty20
crw--w---- 1 root tty 4, 21 2013-06-04 20:40 /dev/tty21
crw--w---- 1 root tty 4, 22 2013-06-04 20:40 /dev/tty22
crw--w---- 1 root tty 4, 23 2013-06-04 20:40 /dev/tty23
crw--w---- 1 root tty 4, 24 2013-06-04 20:40 /dev/tty24
crw--w---- 1 root tty 4, 25 2013-06-04 20:40 /dev/tty25
crw--w---- 1 root tty 4, 26 2013-06-04 20:40 /dev/tty26
crw--w---- 1 root tty 4, 27 2013-06-04 20:40 /dev/tty27
crw--w---- 1 root tty 4, 28 2013-06-04 20:40 /dev/tty28
crw--w---- 1 root tty 4, 29 2013-06-04 20:40 /dev/tty29
crw------- 1 root root 4, 3 2013-06-04 20:40 /dev/tty3
crw--w---- 1 root tty 4, 30 2013-06-04 20:40 /dev/tty30
crw--w---- 1 root tty 4, 31 2013-06-04 20:40 /dev/tty31
crw--w---- 1 root tty 4, 32 2013-06-04 20:40 /dev/tty32
crw--w---- 1 root tty 4, 33 2013-06-04 20:40 /dev/tty33
crw--w---- 1 root tty 4, 34 2013-06-04 20:40 /dev/tty34
crw--w---- 1 root tty 4, 35 2013-06-04 20:40 /dev/tty35
crw--w---- 1 root tty 4, 36 2013-06-04 20:40 /dev/tty36
crw--w---- 1 root tty 4, 37 2013-06-04 20:40 /dev/tty37
crw--w---- 1 root tty 4, 38 2013-06-04 20:40 /dev/tty38
crw--w---- 1 root tty 4, 39 2013-06-04 20:40 /dev/tty39
crw------- 1 root root 4, 4 2013-06-04 20:40 /dev/tty4
crw--w---- 1 root tty 4, 40 2013-06-04 20:40 /dev/tty40
crw--w---- 1 root tty 4, 41 2013-06-04 20:40 /dev/tty41
crw--w---- 1 root tty 4, 42 2013-06-04 20:40 /dev/tty42
crw--w---- 1 root tty 4, 43 2013-06-04 20:40 /dev/tty43
crw--w---- 1 root tty 4, 44 2013-06-04 20:40 /dev/tty44
crw--w---- 1 root tty 4, 45 2013-06-04 20:40 /dev/tty45
crw--w---- 1 root tty 4, 46 2013-06-04 20:40 /dev/tty46
crw--w---- 1 root tty 4, 47 2013-06-04 20:40 /dev/tty47
crw--w---- 1 root tty 4, 48 2013-06-04 20:40 /dev/tty48
crw--w---- 1 root tty 4, 49 2013-06-04 20:40 /dev/tty49
crw------- 1 root root 4, 5 2013-06-04 20:40 /dev/tty5
crw--w---- 1 root tty 4, 50 2013-06-04 20:40 /dev/tty50
crw--w---- 1 root tty 4, 51 2013-06-04 20:40 /dev/tty51
crw--w---- 1 root tty 4, 52 2013-06-04 20:40 /dev/tty52
crw--w---- 1 root tty 4, 53 2013-06-04 20:40 /dev/tty53
crw--w---- 1 root tty 4, 54 2013-06-04 20:40 /dev/tty54
crw--w---- 1 root tty 4, 55 2013-06-04 20:40 /dev/tty55
crw--w---- 1 root tty 4, 56 2013-06-04 20:40 /dev/tty56
crw--w---- 1 root tty 4, 57 2013-06-04 20:40 /dev/tty57
crw--w---- 1 root tty 4, 58 2013-06-04 20:40 /dev/tty58
crw--w---- 1 root tty 4, 59 2013-06-04 20:40 /dev/tty59
crw------- 1 root root 4, 6 2013-06-04 20:40 /dev/tty6
crw--w---- 1 root tty 4, 60 2013-06-04 20:40 /dev/tty60
crw--w---- 1 root tty 4, 61 2013-06-04 20:40 /dev/tty61
crw--w---- 1 root tty 4, 62 2013-06-04 20:40 /dev/tty62
crw--w---- 1 root tty 4, 63 2013-06-04 20:40 /dev/tty63
crw--w---- 1 root tty 4, 7 2013-06-04 20:40 /dev/tty7
crw--w---- 1 root tty 4, 8 2013-06-04 20:40 /dev/tty8
crw--w---- 1 root tty 4, 9 2013-06-04 20:40 /dev/tty9
crw------- 1 root root 5, 3 2013-06-04 20:40 /dev/ttyprintk
crw-rw---- 1 root dialout 4, 64 2013-06-04 20:40 /dev/ttyS0
crw-rw---- 1 root dialout 4, 65 2013-06-04 20:40 /dev/ttyS1
crw-rw---- 1 root dialout 4, 74 2013-06-04 20:40 /dev/ttyS10
crw-rw---- 1 root dialout 4, 75 2013-06-04 20:40 /dev/ttyS11
crw-rw---- 1 root dialout 4, 76 2013-06-04 20:40 /dev/ttyS12
crw-rw---- 1 root dialout 4, 77 2013-06-04 20:40 /dev/ttyS13
crw-rw---- 1 root dialout 4, 78 2013-06-04 20:40 /dev/ttyS14
crw-rw---- 1 root dialout 4, 79 2013-06-04 20:40 /dev/ttyS15
crw-rw---- 1 root dialout 4, 80 2013-06-04 20:40 /dev/ttyS16
crw-rw---- 1 root dialout 4, 81 2013-06-04 20:40 /dev/ttyS17
crw-rw---- 1 root dialout 4, 82 2013-06-04 20:40 /dev/ttyS18
crw-rw---- 1 root dialout 4, 83 2013-06-04 20:40 /dev/ttyS19
crw-rw---- 1 root dialout 4, 66 2013-06-04 20:40 /dev/ttyS2
crw-rw---- 1 root dialout 4, 84 2013-06-04 20:40 /dev/ttyS20
crw-rw---- 1 root dialout 4, 85 2013-06-04 20:40 /dev/ttyS21
crw-rw---- 1 root dialout 4, 86 2013-06-04 20:40 /dev/ttyS22
crw-rw---- 1 root dialout 4, 87 2013-06-04 20:40 /dev/ttyS23
crw-rw---- 1 root dialout 4, 88 2013-06-04 20:40 /dev/ttyS24
crw-rw---- 1 root dialout 4, 89 2013-06-04 20:40 /dev/ttyS25
crw-rw---- 1 root dialout 4, 90 2013-06-04 20:40 /dev/ttyS26
crw-rw---- 1 root dialout 4, 91 2013-06-04 20:40 /dev/ttyS27
crw-rw---- 1 root dialout 4, 92 2013-06-04 20:40 /dev/ttyS28
crw-rw---- 1 root dialout 4, 93 2013-06-04 20:40 /dev/ttyS29
crw-rw---- 1 root dialout 4, 67 2013-06-04 20:40 /dev/ttyS3
crw-rw---- 1 root dialout 4, 94 2013-06-04 20:40 /dev/ttyS30
crw-rw---- 1 root dialout 4, 95 2013-06-04 20:40 /dev/ttyS31
crw-rw---- 1 root dialout 4, 68 2013-06-04 20:40 /dev/ttyS4
crw-rw---- 1 root dialout 4, 69 2013-06-04 20:40 /dev/ttyS5
crw-rw---- 1 root dialout 4, 70 2013-06-04 20:40 /dev/ttyS6
crw-rw---- 1 root dialout 4, 71 2013-06-04 20:40 /dev/ttyS7
crw-rw---- 1 root dialout 4, 72 2013-06-04 20:40 /dev/ttyS8
crw-rw---- 1 root dialout 4, 73 2013-06-04 20:40 /dev/ttyS9
crwxrwxrwx 1 root dialout 188, 0 2013-06-04 21:07 /dev/ttyUSB0
What is it that I am doing wrong?
Thanks,
George
4 Jun
4 Jun
8:29 p.m.
Excerpts from George Andguladze's message of 2013-06-04 10:40:35 -0700:
Cannot open serial device /dev/ttyUSB0
I am getting this error message when I try to connect to my C155 phone and upload
hello_world.compalram.bin using this command:
./osmocon -p /dev/ttyUSB0 -m c155
../../target/firmware/board/compal_e99/hello_world.compalram.bin
Even though device ttyUSB0 exists in my /dev/ directory, and I have set modprobe cp210x,
and chmod 777 /dev/ttyUSB0.
instead of setting 777 permissions on this device, you can simply add yourself to the
dialout group (it's the more proper way)
here the debian command (don't forget to log out and in again for this to take
effect)
sudo adduser $USER dialout
crw-rw---- 1 root dialout 4, 71 2013-06-04 20:40
/dev/ttyS7
crw-rw---- 1 root dialout 4, 72 2013-06-04 20:40 /dev/ttyS8
crw-rw---- 1 root dialout 4, 73 2013-06-04 20:40 /dev/ttyS9
crwxrwxrwx 1 root dialout 188, 0 2013-06-04 21:07 /dev/ttyUSB0
What is it that I am doing wrong?
does it work with root rights (using sudo)?
kevin
5 Jun
5 Jun
8:19 p.m.
Hi,
On 04.06.2013 19:40, George Andguladze wrote:
Cannot open serial device /dev/ttyUSB0
What is it that I am doing wrong?
If you're using a recent version of Ubuntu/Debian, modem-manager opens
serial devices when connected and probes for a modem.
Also, on older versions of Ubuntu brltty might block the port.
To work around the modem-manager issue either uninstall it, or put a
udev blacklist rule in place (where you insert the VID/PID of your
adapter):
http://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/77-mm-usb-de…
Regards,
Steve
11 Jun
11 Jun
10:07 a.m.
Hi Steve,
Thanks for help, but ModemManager doesn't seem to be an issue. Question: Does
"Cannot open serial device /dev/ttyUSB0" error mean that
it is unable to connect to my USB adapter or that there might not be a phone connected on
the other end of the adapter?
George
Date: Wed, 5 Jun 2013 20:19:57 +0200
From: steve(a)steve-m.de
To: gandguladze(a)hotmail.com
Subject: Re: Cannot open serial device /dev/ttyUSB0
CC: baseband-devel(a)lists.osmocom.org
Hi,
On 04.06.2013 19:40, George Andguladze wrote:
Cannot open serial device /dev/ttyUSB0
What is it that I am doing wrong?
If you're using a recent version of Ubuntu/Debian, modem-manager opens
serial devices when connected and probes for a modem.
Also, on older versions of Ubuntu brltty might block the port.
To work around the modem-manager issue either uninstall it, or put a
udev blacklist rule in place (where you insert the VID/PID of your
adapter):
http://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/77-mm-usb-de…
Regards,
Steve
10:39 a.m.
Hi,
Thanks for help, but ModemManager doesn't seem to
be an issue. Question:
Does "Cannot open serial device /dev/ttyUSB0" error mean that
it is unable to connect to my USB adapter or that there might not be a phone
connected on the other end of the adapter?
It means it can't open the char device ... basically the call to
open("/dev/ttyUSB0") failed somehow. nothing to do with the phone.
Cheers,
Sylvain
10:44 a.m.
I can read/write baud rates to EEPROM of the device using cp210x-program. Basically I have
tried everything apart from reinstalling the OS (Ubuntu 10.04). What might be the issue?
(for more info refer to the older conversations)
Date: Tue, 11 Jun 2013 10:39:16 +0200
Subject: Re: Cannot open serial device /dev/ttyUSB0
From: 246tnt(a)gmail.com
To: gandguladze(a)hotmail.com
CC: steve(a)steve-m.de; baseband-devel(a)lists.osmocom.org
Hi,
Thanks for help, but ModemManager doesn't
seem to be an issue. Question:
Does "Cannot open serial device /dev/ttyUSB0" error mean that
it is unable to connect to my USB adapter or that there might not be a phone
connected on the other end of the adapter?
It means it can't open the char device ... basically the call to
open("/dev/ttyUSB0") failed somehow. nothing to do with the phone.
Cheers,
Sylvain
11:21 a.m.
On Tue, Jun 11, 2013 at 10:44 AM, George Andguladze
<gandguladze(a)hotmail.com> wrote:
I can read/write baud rates to EEPROM of the device
using cp210x-program.
Basically I have tried everything apart from reinstalling the OS (Ubuntu
10.04). What might be the issue? (for more info refer to the older
conversations)
Try to strace it.
strace osmocon ....
Cheers,
Sylvain
12:27 p.m.
Hi Sylvain, thanks for that, already getting somewhere. Here are last several lines from
strace output:
open("/dev/ttyUSB0", O_RDWR|O_NOCTTY) = 3
14:21:07.712932 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B115200 opost isig icanon echo
...}) = 0
14:21:07.713657 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B115200 opost isig icanon echo
...}) = 0
14:21:07.713847 ioctl(3, SNDCTL_TMR_START or TCSETS, {B115200 -opost -isig -icanon -echo
...}) = 0
14:21:07.715039 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B115200 -opost -isig -icanon
-echo ...}) = 0
14:21:07.715261 ioctl(3, TIOCMBIS, [TIOCM_DTR|TIOCM_RTS]) = -1 EPIPE (Broken pipe)
14:21:07.717054 close(3) = 0
14:21:07.720986 write(2, "Cannot open serial device /dev/t"..., 39Cannot open
serial device /dev/ttyUSB0
I got -1 at ioctl(3, TIOCMBIS, [TIOCM_DTR|TIOCM_RTS]) (Broken pipe). But it was actually
able to open "/dev/ttyUSB0" (returned 3). Have to find out what -1 means at this
point.
Date: Tue, 11 Jun 2013 11:21:23 +0200
Subject: Re: Cannot open serial device /dev/ttyUSB0
From: 246tnt(a)gmail.com
To: gandguladze(a)hotmail.com
CC: baseband-devel(a)lists.osmocom.org
On Tue, Jun 11, 2013 at 10:44 AM, George Andguladze
<gandguladze(a)hotmail.com> wrote:
I can read/write baud rates to EEPROM of the
device using cp210x-program.
Basically I have tried everything apart from reinstalling the OS (Ubuntu
10.04). What might be the issue? (for more info refer to the older
conversations)
Try to strace it.
strace osmocon ....
Cheers,
Sylvain
11:27 a.m.
New subject: Vedr: Cannot open serial device /dev/ttyUSB0
________________________________
I had some problems with similar error message,they occurred when I wanted to restart
osmocom-apps after having removed phone with its usb cable
from pc and then reinserting phone and usb-cable. But when I just remove the phone from
the usb-cable and then reconnect phone to the cable the "Cannot open serial device
/dev/ttyUSB0" messages no longer occur and one can then rerun the osmocom-apps
without error messages.
Regards
Erich
25 Dec
25 Dec
7:53 a.m.
Experiencing the same problem with "cannot open serial device". LSUSB list
group of USB devices, my T191 cable even has it's own name as UART ... when
connected (by the way other cable looks like thin USB-jack does not appear
in lsusb), but still every time getting "cannot open".
What is it that I am doing wrong?
--
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http://baseband-devel.722152.n3.nabble.com/Cannot-open-serial-device-dev-tt…
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10 comments
7 participants
participants (7)
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Erich Dachleger -
George Andguladze -
Kevin Redon -
Peter Stuge -
Steve Markgraf -
Sylvain Munaut -
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