【linux】OPENWRT串口通信stty安装使用
【linux】OPENWRT串口通信stty安装使用概述
本文讲述如何在【linux】OPENWRT环境下安装使用串口通信工具stty
stty安装--在线安装
在线安装 前题先连接网络
更新opkg
Openwrt是基于opkg包管理，安装前先更新opkg，注意要连接网络
root@SunLink:~# opkg update
Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack ages/base/Packages.gz.
Updated list of available packages in /var/opkg-lists/chaos_calmer_base.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack ages/base/Packages.sig.
Signature check passed
......
Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack ages/telephony/Packages.sig.
Signature check passed.
stty安装
执行命令：
opkg install coreutils-stty
root@SunLink:~# opkg install coreutils-stty
Installing coreutils-stty (8.23-1) to root...
Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack ages/packages/coreutils-stty_8.23-1_ramips_24kec.ipk.
Installing coreutils (8.23-1) to root...
Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack ages/packages/coreutils_8.23-1_ramips_24kec.ipk.
Configuring coreutils.
Configuring coreutils-stty.
stt查看帮助
不会新命令都执行一下加--help参数就没错
root@SunLink:~# stty --help
Usage: stty [-F DEVICE | --file=DEVICE] ...
or:stty [-F DEVICE | --file=DEVICE] [-a|--all]
or:stty [-F DEVICE | --file=DEVICE] [-g|--save]
Print or change terminal characteristics.
Mandatory arguments to long options are mandatory for short options too.
-a, --all print all current settings in human-readable form
-g, --save print all current settings in a stty-readable form
-F, --file=DEVICEopen and use the specified DEVICE instead of stdin
--help display this help and exit
--versionoutput version information and exit
Optional - before SETTING indicates negation.An * marks non-POSIX
settings.The underlying system defines which settings are available.
Special characters:
dsusp CHAR CHAR will send a terminal stop signal once input flushed
eof CHAR CHAR will send an end of file (terminate the input)
eol CHAR CHAR will end the line
eol2 CHAR alternate CHAR for ending the line
erase CHAR CHAR will erase the last character typed
intr CHAR CHAR will send an interrupt signal
kill CHAR CHAR will erase the current line
lnext CHAR CHAR will enter the next character quoted
quit CHAR CHAR will send a quit signal
rprnt CHAR CHAR will redraw the current line
start CHAR CHAR will restart the output after stopping it
stop CHAR CHAR will stop the output
susp CHAR CHAR will send a terminal stop signal
swtch CHAR CHAR will switch to a different shell layer
werase CHAR CHAR will erase the last word typed
Special settings:
N set the input and output speeds to N bauds
cols N tell the kernel that the terminal has N columns
columns N same as cols N
ispeed N set the input speed to N
line N use line discipline N
min N with -icanon, set N characters minimum for a completed read
ospeed N set the output speed to N
rows N tell the kernel that the terminal has N rows
size print the number of rows and columns according to the kernel
speed print the terminal speed
time N with -icanon, set read timeout of N tenths of a second
Control settings:
[-]clocal disable modem control signals
[-]cread allow input to be received
[-]crtscts enable RTS/CTS handshaking
[-]cdtrdsr enable DTR/DSR handshaking
csN set character size to N bits, N in
[-]cstopb use two stop bits per character (one with '-')
[-]hup send a hangup signal when the last process closes the tty
[-]hupcl same as [-]hup
[-]parenb generate parity bit in output and expect parity bit in input
[-]parodd set odd parity (or even parity with '-')
[-]cmspar use "stick" (mark/space) parity
Input settings:
[-]brkint breaks cause an interrupt signal
[-]icrnl translate carriage return to newline
[-]ignbrk ignore break characters
[-]igncr ignore carriage return
[-]ignpar ignore characters with parity errors
[-]imaxbel beep and do not flush a full input buffer on a character
[-]inlcr translate newline to carriage return
[-]inpck enable input parity checking
[-]istrip clear high (8th) bit of input characters
[-]iutf8 assume input characters are UTF-8 encoded
[-]iuclc translate uppercase characters to lowercase
[-]ixany let any character restart output, not only start character
[-]ixoff enable sending of start/stop characters
[-]ixon enable XON/XOFF flow control
[-]parmrk mark parity errors (with a 255-0-character sequence)
[-]tandem same as [-]ixoff
Output settings:
bsN backspace delay style, N in
crN carriage return delay style, N in
ffN form feed delay style, N in
nlN newline delay style, N in
[-]ocrnl translate carriage return to newline
[-]ofdel use delete characters for fill instead of NUL characters
[-]ofill use fill (padding) characters instead of timing for delays
[-]olcuc translate lowercase characters to uppercase
[-]onlcr translate newline to carriage return-newline
[-]onlret newline performs a carriage return
[-]onocr do not print carriage returns in the first column
[-]opost postprocess output
tabN horizontal tab delay style, N in
tabs same as tab0
-tabs same as tab3
vtN vertical tab delay style, N in
Local settings:
[-]crterase echo erase characters as backspace-space-backspace
crtkill kill all line by obeying the echoprt and echoe settings
-crtkill kill all line by obeying the echoctl and echok settings
[-]ctlecho echo control characters in hat notation ('^c')
[-]echo echo input characters
[-]echoctl same as [-]ctlecho
[-]echoe same as [-]crterase
[-]echok echo a newline after a kill character
[-]echoke same as [-]crtkill
[-]echonl echo newline even if not echoing other characters
[-]echoprt echo erased characters backward, between '' and '/'
[-]icanon enable erase, kill, werase, and rprnt special characters
[-]iexten enable non-POSIX special characters
[-]isig enable interrupt, quit, and suspend special characters
[-]noflsh disable flushing after interrupt and quit special characters
[-]prterase same as [-]echoprt
[-]tostop stop background jobs that try to write to the terminal
[-]xcase with icanon, escape with '' for uppercase characters
Combination settings:
[-]LCASE same as [-]lcase
cbreak same as -icanon
-cbreak same as icanon
cooked same as brkint ignpar istrip icrnl ixon opost isig
icanon, eof and eol characters to their default values
-cooked same as raw
crt same as echoe echoctl echoke
dec same as echoe echoctl echoke -ixany intr ^c erase 0177
kill ^u
[-]decctlq same as [-]ixany
ek erase and kill characters to their default values
evenp same as parenb -parodd cs7
-evenp same as -parenb cs8
[-]lcase same as xcase iuclc olcuc
litout same as -parenb -istrip -opost cs8
-litout same as parenb istrip opost cs7
nl same as -icrnl -onlcr
-nl same as icrnl -inlcr -igncr onlcr -ocrnl -onlret
oddp same as parenb parodd cs7
-oddp same as -parenb cs8
[-]parity same as [-]evenp
pass8 same as -parenb -istrip cs8
-pass8 same as parenb istrip cs7
raw same as -ignbrk -brkint -ignpar -parmrk -inpck -istrip
-inlcr -igncr -icrnl-ixon-ixoff-iuclc-ixany
-imaxbel -opost -isig -icanon -xcase min 1 time 0
-raw same as cooked
sane same as cread -ignbrk brkint -inlcr -igncr icrnl -iutf8
-ixoff -iuclc -ixany imaxbel opost -olcuc -ocrnl onlcr
-onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh
-xcase -tostop -echoprt echoctl echoke, all special
characters to their default values
Handle the tty line connected to standard input.Without arguments,
prints baud rate, line discipline, and deviations from stty sane.In
settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or
127; special values ^- or undef used to disable special characters.
GNU coreutils online help: http://www.gnu.org/software/coreutils/
Report stty translation bugs to http://translationproject.org/team/
For complete documentation, run: info coreutils 'stty invocation'
stty应用举例
设置串口波特率
老规矩串口使用前先配置波特率
root@SunLink:~# stty -F /dev/ttyS1 raw speed 115200
115200
查看串口配置
root@SunLink:~# stty -F /dev/ttyS2
speed 115200 baud; line = 0;
intr = ; quit = ; erase = ; kill = ; eof = ; susp = ;
rprnt = ; werase = ; lnext = ; flush = ; min = 1; time = 0;
-brkint -icrnl -imaxbel
-opost
-isig -icanon -iexten -echo
Shell命令读串口（接收数据）命令
cat /dev/ttyS1 & #后台运行
Shell命令写串口（发送数据）命令
echo -e "ttyS1 Send.." > /dev/ttyS1
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