Re: [Contiki-developers] Introduction and initial question

[David K. <da...@em...>]

Maybe something similar to PSOCK_GENERATOR_SEND is what you are looking for, a subroutine that returns to the main idle loop until it’s job is done, then returns to the calling protothread?
See examples in /apps/webserver/httpd-cgi.c, and the way the calls are handled in /core/psock.c

From: Payton Byrd 
Sent: Friday, April 08, 2011 3:15 PM
To: Contiki developer mailing list 
Subject: Re: [Contiki-developers] Introduction and initial question

Just curious if anyone has any insight into what's going on here.  Can someone point to a comprehensive example of doing this the right way?


On Tue, Apr 5, 2011 at 10:33 PM, Payton Byrd <pl...@gm...> wrote:




  On Mon, Apr 4, 2011 at 2:48 PM, Nicolas Tsiftes <nv...@si...> wrote:

    Payton Byrd wrote 2011-04-04 03:55: 
      Hello! 

      My name's Payton and I'm a retroputing addict.

      I also happen to be a programmer and so mixing the two has led me to starting some development with Contiki.  Right now my focus is on learning the ins-and-outs of text-based processing and am currently porting a simple input-output game to using the telnet-server example.  I've created a process for the game and can get the game to output data using shell_output_str.  My conundrum today is how do I get input from the user?  I've looked at shell_input, but I cannot figure out where to get results from it.  Is there a good example that I should be looking at?

      Thanks!




    Hello Payton,

    One example that uses the shell's input method is apps/shell/shell-coffee.c. After typing the "format" command, the command asks the user to answer whether to proceed or not. telnetd calls shell_input, and the data is posted to the shell command process as an event called "shell_event_input".

    Nicolas



  Nicolas,

  Thank you for the reply.  I found the code in shell-coffee.c that reads the input from the client.  However, this has raised some concerns and questions for me that I may not be using the correct code.

  The method I found to read from the client is this:

  PROCESS_WAIT_EVENT_UNTIL(ev == shell_event_input);
  d = data;
  if(d->len1 > 0)
  {
  strcpy(input, d->data1);
  }

  The concern I have is that the PROCESS_WAIT_EVENT_UNTIL macro will not compile unless it is placed inside of a method that was declared with the PROCESS_THREAD macro.  I want to be able to read input from some deeply nested logic and don't see how I'll be able to expose the appropriate variable in the PROCESS_WAIT_EVENT_UNTIL macro all the way through the call stack.

  The problem I'm having is that I can read from the client fine one time, but after that trying to send data back to the client with shell_default_output no longer works and then when the loop returns back to the PROCESS_WAIT_EVENT_UNTIL macro to read more data the server starts sending gobs of data that eventually cause the telnet client to abort because of a buffer overflow, and sometimes the server will actually just drop to the ready prompt (my target is the Commodore 64).

  As before, any help would be greatly appreciated.



-- 
Payton Byrd
<http://www.paytonbyrd.com>
<http://it.toolbox.com/blogs/paytonbyrd>



--------------------------------------------------------------------------------
------------------------------------------------------------------------------
Xperia(TM) PLAY
It's a major breakthrough. An authentic gaming
smartphone on the nation's most reliable network.
And it wants your games.
http://p.sf.net/sfu/verizon-sfdev 


--------------------------------------------------------------------------------
_______________________________________________
Contiki-developers mailing list
Con...@li...
https://lists.sourceforge.net/lists/listinfo/contiki-developers