nanogui: Thread: what is the difference between kbd_tty.c and kbd_ttyscan.c?

hi, everyone!
I have two questions about nano-X keyboard driver.

1.why there are two kbd_tty drivers?
I found the two files in src/drivers/ directory, and it seems that
nano-X uses kbd_tty.c only. so what does kbd_ttyscan.c mean?

2.nano-X with fb supported will crash when I enter a direction key.
What should I do to ignore those keys?

Thanks in advance!

twmt

you might want to take a look at the FAQ
(www.microwindows.org/faq.html), there is part about
the difference between scantty and ttykeyb

alain


--- twmt ####@####.#### wrote:

> hi, everyone!
> I have two questions about nano-X keyboard driver.
> 
> 1.why there are two kbd_tty drivers?
> I found the two files in src/drivers/ directory, and
> it seems that
> nano-X uses kbd_tty.c only. so what does
> kbd_ttyscan.c mean?



> 
> 2.nano-X with fb supported will crash when I enter a
> direction key.
> What should I do to ignore those keys?
> 
> Thanks in advance!
> 
> twmt
> 
>
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> 1.why there are two kbd_tty drivers?
I found the two files in src/drivers/ directory, and it seems that
nano-X uses kbd_tty.c only. so what does kbd_ttyscan.c mean?

The tty driver returns whatever (possibly a sequence) of 8-bit
characters from the keyboard.  The ttyscan driver converts
keypresses like F1 (which are normally ESC x x) to a
single 16-bit MWKEY_xxx value.  In general, it is superior
to the basic tty driver.


> 2.nano-X with fb supported will crash when I enter a direction key.
What should I do to ignore those keys?

nano-X doesn't crash on an arrow key, it exits, since it sees
the prefix ESC from the tty driver.  Use -e to stop this action.

Regards,

Greg