====== stty ======
''stty'' gives control over the terminal settings.

To view the running settings, use:
  stty -a

===== Custimization =====

==== Defining Control Sequences ====
The syntax is:
  stty <Signal> <Sequence>

  * ''Signal'' is one of the predefined ones, see ''stty(1)''.
  * ''Sequence'' maybe anything possible, but a good choice is defining an Escape Sequence (starting with ''^'').

Example:
   stty stop ^Y

**NB:** Regular sequences are interpreted case sensitive, escape sequences are not!


===== The ''^S''-Problem =====
You typed //C-s//? Terminal hangs? In fact, you sent a ''stop'' signal.

Do not even try, typing ''reset'' does not help.

The output of ''stty -a'' gives some insight:
  % stty -a
  speed 38400 baud; rows 51; columns 89; line = 54;
  intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>;
  swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V;
  flush = ^O; min = 1; time = 0;
  -parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
  -ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc -ixany
  imaxbel -iutf8
  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 
The values for ''stop'' and ''start'' are relevant here:
  start = ^Q; 
  stop = ^S;
Therefore, typing //C-q// should bring things back to normal.

===== Serial Terminal Baud Rate =====

''stty'' can set the terminal's baud rate and it receives feedback whether the
value was accepted. This may be used to find out what max baud rate a serial
port supports. A simple script could loop over:

  # stty -F /dev/ttyX <value>

checking the return value. With regular serial ports, max speed is typically
115200baud. USB-serial-adapters may do more, relevant with some OBD2-adapters
for car diagnostics.

Standard baud values are found in ///usr/include/asm-generic/termbits.h// and
///usr/include/asm-generic/termbits-common.h// as defines with name ''B<value>'':

  #define     B0          0x00000000      /* hang up */
  #define    B50          0x00000001
  #define    B75          0x00000002
  #define   B110          0x00000003
  #define   B134          0x00000004
  #define   B150          0x00000005
  #define   B200          0x00000006
  #define   B300          0x00000007
  #define   B600          0x00000008      
  #define  B1200          0x00000009
  #define  B1800          0x0000000a
  #define  B2400          0x0000000b
  #define  B4800          0x0000000c
  #define  B9600          0x0000000d
  #define B19200          0x0000000e
  #define B38400          0x0000000f
  
  #define     B57600      0x00001001
  #define    B115200      0x00001002
  #define    B230400      0x00001003
  #define    B460800      0x00001004
  #define    B500000      0x00001005
  #define    B576000      0x00001006
  #define    B921600      0x00001007
  #define   B1000000      0x00001008
  #define   B1152000      0x00001009
  #define   B1500000      0x0000100a
  #define   B2000000      0x0000100b
  #define   B2500000      0x0000100c
  #define   B3000000      0x0000100d
  #define   B3500000      0x0000100e
  #define   B4000000      0x0000100f