Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
02/15/07 23:19
Read: times


 		 #133094 - Configure the terminal program correctly
Responding to: ???'s previous message
Richard Erlacher said:
I wonder why so many EVB's have those tiebacks etched into the board?


Of the two EVBs I have to hand, neither of them have this, and I've never noticed it on others. Maybe other boards have it because some people don't know how to configure their terminal programs properly and it's easier to do this in HW than to educate the users.

I've been designing PC serial attached devices for more than 15 years (that's DOS through Vista) and exactly zero of them have RTS/CTS or DTR/DSR loopbacks. And I have never had a problem configuring a computer (hundreds of different types) to work with the devices.

In fact the 16550A (or integrated chipset equivalent) on PCs doesn't even support RTS/CTS flow control natively, so if the "PC won't talk" then this behaviour has been programmed into the driver via software (and the Windows drivers DO allow flow control -> none).

So I suggest that you enlighten yourself by solving the problem of why your notebook terminal program doesn't work in this mode, and then cease propagating the myth that these loopbacks are necessary.


List of 30 messages in thread
TopicAuthorDate
how do we test whether MAX232 is working            01/01/70 00:00      
   V+ and V-            01/01/70 00:00      
   Can I conclude then...            01/01/70 00:00      
      checking for working of serial port            01/01/70 00:00      
         You have excluded the most obvious first?            01/01/70 00:00      
   Be sure the cable is wired correctly            01/01/70 00:00      
      3 Wire            01/01/70 00:00      
         That doesn't seem to work with my old notebook            01/01/70 00:00      
            Configure the terminal program correctly            01/01/70 00:00      
               So far, It's never been an issue            01/01/70 00:00      
                  It's the application, not the PC            01/01/70 00:00      
      It's the application, not the PC            01/01/70 00:00      
         I have routinely done this in the past            01/01/70 00:00      
            Ive seen it working...            01/01/70 00:00      
               You missed my point            01/01/70 00:00      
                  Better safe than sorry, Eh?            01/01/70 00:00      
                     it's not all in the application            01/01/70 00:00      
                        but the OP stated            01/01/70 00:00      
                           True enough ...            01/01/70 00:00      
                        Now, now, we don\'t split hair do we?            01/01/70 00:00      
                           keep splitting :-)            01/01/70 00:00      
                           I've been fiddling with RS232 connections ...            01/01/70 00:00      
                     Ok, enough of twist and turn....            01/01/70 00:00      
                        I don\\\'t see what\\\'s not straight about this            01/01/70 00:00      
                           This has gone far enough.            01/01/70 00:00      
                              Guys, guys            01/01/70 00:00      
                              OK ,,, I see what you mean            01/01/70 00:00      
   @site administrator            01/01/70 00:00      
   @site administrator            01/01/70 00:00      
      Again... What was the solution?            01/01/70 00:00      

Back to Subject List