This is not reading from the port. You cannot do 2 redirections. You're attaching stdout to /dev/ttyS0 but immediately changing that to a file called bla.
Code:
mute@thedoctor:~$ echo hi >file1 >file2
mute@thedoctor:~$ ls -l file?
-rw-r--r-- 1 mute mute 0 Oct 19 21:29 file1
-rw-r--r-- 1 mute mute 3 Oct 19 21:29 file2
This shows how redirection to two places fails. You only need to:
Code:
$ echo W >/dev/ttyS0
$ cat /dev/ttyS0
Try to set permissions, as root, to allow everyone access to the serial port with chmod 0666 /dev/ttyS0. If your code then works, the issue is that the webserver doesn't run as ethan, but another user who doesn't have access to ttyS0.
I think my serial port(on board) is not working ......
because when I am running same code on two machines its working good....but when my system comes into picture ....it doesnt show any output comming from serial port..........
can anybody tell me how to configure my serial port.........or to... (16 Replies)
Hi,
I am working with solaris 9,SUN-Blade-100 and I want to communicate with the Serial port.To check whether the port is working or not.I write code and when I execute the file,then I got the output--
According to this,serial port is not found.can anyone please tell me how to configure the... (1 Reply)
I have a need to determine when a string has been completely sent via a serial port from a standard 'C' application. The code is as follows:
SerialPort_Send = open (pPortString, O_WRONLY | O_NOCTTY | O_NONBLOCK);
write (SerialPort_Send, pCommandString, strlen (pCommandString));
... (2 Replies)
Hi,
How can i configure my modem in AIX thru serial port (sa0-->tty0)
I have two port serial card configured as sa0
I created tty1 which port is tty0 and which port is tty1 how can i know?? (1 Reply)
A neighbour's Ubuntu 10.04 machine has five serial ports, one on the motherboard and four on a PCI card. However, only four cards are showing:
# dmesg | grep tty
console enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
... (2 Replies)
Hi,
I have a external board connected to my serial port. I need to execute "shutdown -r now" command when system boot up. When system boots up it requires a username ans password. Then I need to run my command. I can use rc script but that is rebooting system before it asks for username and... (0 Replies)
Hi Everyone,
In my environment, I have few T5220. On the iLOM Management Card, I have both Network and Serial port are cabled, I don't have any issues while I try to connect using Network Management port, but when I try to connect the serial port for the same server which is actually connected... (3 Replies)
hello all,
please any one can provide me the shell script to write data to /dev/ttyS1
and read responce from /dev/ttyS1 and compare the responce to some string ..
thnxx
---------- Post updated at 03:35 PM ---------- Previous update was at 11:46 AM ----------
any body help me..
how do i... (1 Reply)
Hello,
I have an unloaded T5140 machine and want to access the ILOM for the first time and subsequently the network port after that., and then load Solaris 10 the final January 2011 build.
The first part is what confuses me -the cabling.
I am coming from a Windows machine (w/appropriate... (5 Replies)
Discussion started by: joboy
5 Replies
LEARN ABOUT NETBSD
mixerctl
MIXERCTL(1) BSD General Commands Manual MIXERCTL(1)NAME
mixerctl -- control audio mixing
SYNOPSIS
mixerctl [-d file] [-n] [-v] -a
mixerctl [-d file] [-n] [-v] name ...
mixerctl [-d file] [-n] -w name=value ...
mixerctl [-d file] [-n] -w name++ ...
mixerctl [-d file] [-n] -w name-- ...
mixerctl [-d file] [-n] -w name+=value ...
mixerctl [-d file] [-n] -w name-=value ...
DESCRIPTION
The mixerctl command displays or sets various audio system mixing variables. If a list of variables is present on the command line, then
mixerctl prints the current value of those variables for the specified device. If the -a flag is specified, all variables for the device are
printed. If the -w flag is specified, mixerctl attempts to set the specified variables to the given values.
The -d flag can be used to give an alternative mixer device. The default is /dev/mixer.
The -n flag suppresses printing of the variable name.
The -v flag shows the possible values of enumeration and set valued variables. Enumerated values are shown in brackets (``[]'') and set val-
ues are shown in curly braces (``{}'').
The exact set of controls that can be manipulated depends on the mixer. The general format (in both getting and setting a value) is
class.name = value
class can have values like inputs or outputs, indicating that the control affects the input or output of the mixer, respectively. name indi-
cates what part of the mixer the control affects. Continuous mixer values, e.g., volume, have numeric values in the range 0-255. If value
can be set for each channel independently, the values are printed separated by commas. Discrete mixer values, e.g., the recording source,
have symbolic names. Depending on the mixer it may either be an enumeration or a set.
The suffixes ++ and -- can be used to step through the values of a mixer control. For numeric controls, these operators increase or
decrease, respectively, the value by an amount (the delta) suitable to make the control assume the next possible value. For binary controls,
these operators toggle between on and off.
The operators += and -= change the value of a mixer control by the indicated number of steps.
ENVIRONMENT
MIXERDEVICE the mixer device to use.
FILES
/dev/mixer mixer audio device
/etc/mixerctl.conf mixer configuration file
EXAMPLES
The command
mixerctl -a -v
can produce
inputs.mic=0,0 volume
inputs.mic.mute=off [ off on ]
inputs.cd=220,220 volume
inputs.cd.mute=off [ off on ]
inputs.dac=220,220 volume
inputs.dac.mute=off [ off on ]
record.record=220,220 volume
record.record.source=mic [ mic cd dac ]
monitor.monitor=0 volume
COMPATIBILITY
The old -f flag is still supported. This support will be removed eventually.
SEE ALSO audioctl(1), audio(4), mixerctl.conf(5), sysctl(8)HISTORY
The mixerctl command first appeared in NetBSD 1.3.
BSD August 15, 2008 BSD