sending a break through expect running under cygwin

[dans45]

Hi, I'm running cygwin on my w2k workstation and am trying to send/receive over the com1 port. I'm able to receive data OK and in some cases to send data but to initialize communication I have to send a break of some sort to the program running on the other end of the serial interface. Under procomm I would just send <alt><b> combination. Under cygwin/expect(expect is extension of tcl) I cannot seem to find the right key combination. Please, anyone know what to send...I've already tried <break> and <alb> and <break> keys with many other keys in combination but no success. Thanks for your help.

 

[marsd]

Dans.
Use exp_internal 1 to see what expect sees.
For instance:

set prompt ".*@.*"
spawn -noecho /bin/bash

  expect  {
          -re $prompt {
                      send_user "Debugging enabled\n"
                      send_user "~q to quit"
                      exp_internal 1
                      interact {
                               "~q" {catch {close $spawn_id};exit}
                       }
           }

              eof {some_action}
              timeout {another_action}
    }

Now you get to see what expect makes of your
control sequences and everything else.
HTH