【linux】OPENWRT串口通信stty安装使用

鸣涧

【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

1. root@SunLink:~# opkg update
   
2. Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack                                                                                                        ages/base/Packages.gz.
   
3. Updated list of available packages in /var/opkg-lists/chaos_calmer_base.
   
4. Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack                                                                                                        ages/base/Packages.sig.
   
5. Signature check passed
   
6. ......
   
7. Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack                                                                                                        ages/telephony/Packages.sig.
   
8. Signature check passed.

复制代码

stty安装


执行命令：

1. opkg install coreutils-stty

复制代码

1. root@SunLink:~# opkg install coreutils-stty
   
2. Installing coreutils-stty (8.23-1) to root...
   
3. Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack                                                                                                        ages/packages/coreutils-stty_8.23-1_ramips_24kec.ipk.
   
4. Installing coreutils (8.23-1) to root...
   
5. Downloading http://downloads.openwrt.org/chaos_calmer/15.05.1/ramips/mt7628/pack                                                                                                        ages/packages/coreutils_8.23-1_ramips_24kec.ipk.
   
6. Configuring coreutils.
   
7. Configuring coreutils-stty.

复制代码

stt查看帮助

不会新命令都执行一下加--help参数就没错

1. root@SunLink:~# stty --help
   
2. Usage: stty [-F DEVICE | --file=DEVICE] [SETTING]...
   
3. or:  stty [-F DEVICE | --file=DEVICE] [-a|--all]
   
4. or:  stty [-F DEVICE | --file=DEVICE] [-g|--save]
   
5. Print or change terminal characteristics.
   
6. Mandatory arguments to long options are mandatory for short options too.
   
7. -a, --all          print all current settings in human-readable form
   
8. -g, --save         print all current settings in a stty-readable form
   
9. -F, --file=DEVICE  open and use the specified DEVICE instead of stdin
   
10. --help     display this help and exit
    
11. --version  output version information and exit
    
12. Optional - before SETTING indicates negation.  An * marks non-POSIX
    
13. settings.  The underlying system defines which settings are available.
    
14. Special characters:
    
15. dsusp CHAR    CHAR will send a terminal stop signal once input flushed
    
16. 
    
17. eof CHAR      CHAR will send an end of file (terminate the input)
    
18. eol CHAR      CHAR will end the line
    
19. eol2 CHAR     alternate CHAR for ending the line
    
20. 
    
21. erase CHAR    CHAR will erase the last character typed
    
22. intr CHAR     CHAR will send an interrupt signal
    
23. kill CHAR     CHAR will erase the current line
    
24. lnext CHAR    CHAR will enter the next character quoted
    
25. 
    
26. quit CHAR     CHAR will send a quit signal
    
27. rprnt CHAR    CHAR will redraw the current line
    
28. 
    
29. start CHAR    CHAR will restart the output after stopping it
    
30. stop CHAR     CHAR will stop the output
    
31. susp CHAR     CHAR will send a terminal stop signal
    
32. swtch CHAR    CHAR will switch to a different shell layer
    
33. werase CHAR   CHAR will erase the last word typed
    
34. 
    
35. Special settings:
    
36. N             set the input and output speeds to N bauds
    
37. cols N        tell the kernel that the terminal has N columns
    
38. columns N     same as cols N
    
39. 
    
40. ispeed N      set the input speed to N
    
41. line N        use line discipline N
    
42. 
    
43. min N         with -icanon, set N characters minimum for a completed read
    
44. ospeed N      set the output speed to N
    
45. rows N        tell the kernel that the terminal has N rows
    
46. size          print the number of rows and columns according to the kernel
    
47. 
    
48. speed         print the terminal speed
    
49. time N        with -icanon, set read timeout of N tenths of a second
    
50. Control settings:
    
51. [-]clocal     disable modem control signals
    
52. [-]cread      allow input to be received
    
53. [-]crtscts    enable RTS/CTS handshaking
    
54. [-]cdtrdsr    enable DTR/DSR handshaking
    
55. 
    
56. csN           set character size to N bits, N in [5..8]
    
57. [-]cstopb     use two stop bits per character (one with '-')
    
58. [-]hup        send a hangup signal when the last process closes the tty
    
59. [-]hupcl      same as [-]hup
    
60. [-]parenb     generate parity bit in output and expect parity bit in input
    
61. [-]parodd     set odd parity (or even parity with '-')
    
62. [-]cmspar     use "stick" (mark/space) parity
    
63. 
    
64. Input settings:
    
65. [-]brkint     breaks cause an interrupt signal
    
66. [-]icrnl      translate carriage return to newline
    
67. [-]ignbrk     ignore break characters
    
68. [-]igncr      ignore carriage return
    
69. [-]ignpar     ignore characters with parity errors
    
70. [-]imaxbel    beep and do not flush a full input buffer on a character
    
71. 
    
72. [-]inlcr      translate newline to carriage return
    
73. [-]inpck      enable input parity checking
    
74. [-]istrip     clear high (8th) bit of input characters
    
75. [-]iutf8      assume input characters are UTF-8 encoded
    
76. [-]iuclc      translate uppercase characters to lowercase
    
77. [-]ixany      let any character restart output, not only start character
    
78. 
    
79. [-]ixoff      enable sending of start/stop characters
    
80. [-]ixon       enable XON/XOFF flow control
    
81. [-]parmrk     mark parity errors (with a 255-0-character sequence)
    
82. [-]tandem     same as [-]ixoff
    
83. Output settings:
    
84. bsN           backspace delay style, N in [0..1]
    
85. crN           carriage return delay style, N in [0..3]
    
86. ffN           form feed delay style, N in [0..1]
    
87. nlN           newline delay style, N in [0..1]
    
88. [-]ocrnl      translate carriage return to newline
    
89. [-]ofdel      use delete characters for fill instead of NUL characters
    
90. [-]ofill      use fill (padding) characters instead of timing for delays
    
91. [-]olcuc      translate lowercase characters to uppercase
    
92. [-]onlcr      translate newline to carriage return-newline
    
93. [-]onlret     newline performs a carriage return
    
94. [-]onocr      do not print carriage returns in the first column
    
95. 
    
96. [-]opost      postprocess output
    
97. tabN          horizontal tab delay style, N in [0..3]
    
98. tabs          same as tab0
    
99. -tabs         same as tab3
    
100. vtN           vertical tab delay style, N in [0..1]
     
101. 
     
102. Local settings:
     
103. [-]crterase   echo erase characters as backspace-space-backspace
     
104. crtkill       kill all line by obeying the echoprt and echoe settings
     
105. -crtkill      kill all line by obeying the echoctl and echok settings
     
106. [-]ctlecho    echo control characters in hat notation ('^c')
     
107. 
     
108. [-]echo       echo input characters
     
109. [-]echoctl    same as [-]ctlecho
     
110. 
     
111. [-]echoe      same as [-]crterase
     
112. [-]echok      echo a newline after a kill character
     
113. [-]echoke     same as [-]crtkill
     
114. 
     
115. [-]echonl     echo newline even if not echoing other characters
     
116. [-]echoprt    echo erased characters backward, between '' and '/'
     
117. 
     
118. [-]icanon     enable erase, kill, werase, and rprnt special characters
     
119. [-]iexten     enable non-POSIX special characters
     
120. [-]isig       enable interrupt, quit, and suspend special characters
     
121. [-]noflsh     disable flushing after interrupt and quit special characters
     
122. [-]prterase   same as [-]echoprt
     
123. [-]tostop     stop background jobs that try to write to the terminal
     
124. [-]xcase      with icanon, escape with '' for uppercase characters
     
125. 
     
126. Combination settings:
     
127. [-]LCASE      same as [-]lcase
     
128. 
     
129. cbreak        same as -icanon
     
130. -cbreak       same as icanon
     
131. cooked        same as brkint ignpar istrip icrnl ixon opost isig
     
132. icanon, eof and eol characters to their default values
     
133. -cooked       same as raw
     
134. crt           same as echoe echoctl echoke
     
135. dec           same as echoe echoctl echoke -ixany intr ^c erase 0177
     
136. kill ^u
     
137. [-]decctlq    same as [-]ixany
     
138. 
     
139. ek            erase and kill characters to their default values
     
140. evenp         same as parenb -parodd cs7
     
141. -evenp        same as -parenb cs8
     
142. [-]lcase      same as xcase iuclc olcuc
     
143. 
     
144. litout        same as -parenb -istrip -opost cs8
     
145. -litout       same as parenb istrip opost cs7
     
146. nl            same as -icrnl -onlcr
     
147. -nl           same as icrnl -inlcr -igncr onlcr -ocrnl -onlret
     
148. oddp          same as parenb parodd cs7
     
149. -oddp         same as -parenb cs8
     
150. [-]parity     same as [-]evenp
     
151. pass8         same as -parenb -istrip cs8
     
152. -pass8        same as parenb istrip cs7
     
153. raw           same as -ignbrk -brkint -ignpar -parmrk -inpck -istrip
     
154. -inlcr -igncr -icrnl  -ixon  -ixoff  -iuclc  -ixany
     
155. -imaxbel -opost -isig -icanon -xcase min 1 time 0
     
156. -raw          same as cooked
     
157. sane          same as cread -ignbrk brkint -inlcr -igncr icrnl -iutf8
     
158. -ixoff -iuclc -ixany imaxbel opost -olcuc -ocrnl onlcr
     
159. -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
     
160. isig icanon iexten echo echoe echok -echonl -noflsh
     
161. -xcase -tostop -echoprt echoctl echoke, all special
     
162. characters to their default values
     
163. Handle the tty line connected to standard input.  Without arguments,
     
164. prints baud rate, line discipline, and deviations from stty sane.  In
     
165. settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or
     
166. 127; special values ^- or undef used to disable special characters.
     
167. GNU coreutils online help: http://www.gnu.org/software/coreutils/
     
168. Report stty translation bugs to http://translationproject.org/team/
     
169. For complete documentation, run: info coreutils 'stty invocation'
     

复制代码

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

1. root@SunLink:~# stty -F /dev/ttyS1 raw speed 115200
   
2. 115200

复制代码

查看串口配置

1. root@SunLink:~# stty -F /dev/ttyS2
   
2. speed 115200 baud; line = 0;
   
3. intr = ; quit = ; erase = ; kill = ; eof = ; susp = ;
   
4. rprnt = ; werase = ; lnext = ; flush = ; min = 1; time = 0;
   
5. -brkint -icrnl -imaxbel
   
6. -opost
   
7. -isig -icanon -iexten -echo

复制代码

Shell命令读串口（接收数据）命令

1. cat /dev/ttyS1 & #后台运行

复制代码

Shell命令写串口（发送数据）命令

1. echo -e "ttyS1 Send.." > /dev/ttyS1

复制代码