RE: [ECOS] Keyboard input (i386)

["Richardson, Anthony" <ar63 at evansville dot edu>]

Leandro wrote:
> Hello, I'm trying to get input from the keyboard in a POS 
> context, i386 
> platform. The only thing I could find in eCos is to open /dev/ttydiag 
> and read from there, but for some reason I still can't understand, 
> everytime I read a byte from there that same byte is written on the 
> screen. If I do not open ttydiag, no echo is shown, and I 
> couldn't find 
> where this behaviour takes place inside the code of the 
> kernel. Is there 
> any other way to read from the PS/2 keyboard preventing the echo, id 
> est, in a raw fashion?

I think there are a couple of ways to do this, but the following
is what I've used in the past:

  hal_virtual_comm_table_t* comm;
  comm = CYGACC_CALL_IF_CONSOLE_PROCS();

  while(1) {
     // Get a character
     c = CYGACC_COMM_IF_GETC(*comm);

     // other stuff here
  }

The input is unbuffered, i.e. you don't have to press
newline to get the character.  Also, there is no echo
of the character to the display.

Tony

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