c_stty

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

The stty Command
stty

The stty command displays and sets terminal options.

Format

The format for this command is:

stty	[device][-av] [baud] [sane] [term]
	[ixany|-ixany] [ixoff|-ixoff]

where:

device	is either tty0 or tty1. The default is tty0.

-a	gives a long listing showing all current settings.

-v	displays the possible choices for baud rate and terminal type.

baud	sets the baud rate.

sane	resets terminal settings to the default.

term	sets the terminal emulation type. 

ixany	allows any character to restart the output.

-ixany	allows only START to restart the output.

ixoff	enables the tandem mode.

-ixoff	disables the tandem mode.

When invoking the stty command with no parameters, the Monitor displays the terminal type and baud rate for the tty0 port.

Functional Description

The stty command displays and sets the terminal options, such as terminal 
emulation type, baud rate, and ioctl settings. First, to display the current 
terminal type, baud rate, and ioctl settings for tty0, enter:

PMON stty -a

To display the same information for tty1, enter:

PMON stty tty1 -a

To change the baud rate or terminal type for tty0, simply enter the new set-
ting after stty. Precede the new setting with tty1 to change the settings 
for tty1. 

Examples illustrating the use of this command follow.

PMON stty	Display terminal type and baud rate for tty0.
term=tvi920 baud=9600 

PMON stty -a 		Display terminal type, baud rate, and ioctl 
			settings for tty0.
term=tvi920 baud=9600 
canon echo echoe onlcr icrnl istrip ixon 
erase=^H stop= start=^Q eol=^J eol2=^C vintr=^C 

PMON stty 9600		Set baud rate for tty0 to 9600.

PMON stty -v	List available baud rates.
Baud rates: 
         50   75  110  134   200   150 300 600 1200
        1800 2400 4800 9600 19200 38400

PMON stty tvi920	Set terminal type for tty0 to tvi920.

PMON stty tvi920 9600	Set terminal type and baud rate for tty0 
			to tvi920 and 9600 baud.

PMON stty tty1 sane	Reset ioctl settings for tty1.

PMON stty tty1 19200	Set tty1 to 19200 baud.