OT - how to 'ping' com1 to check it is working?
Turbo Mini Forums

I've had a new HD and everything installed on my laptop, but now can't get my data aq software (that works thru com1) to talk to my laptop. I know that when I first set this up through my COM1 serial few years back the supplier of the unit talked me thru pinging my com port to check it was working.

Anyways - I think I need to do this again as nothing else is working.

But no idea How I did it the first time?

The only way I know of is to do a loopback test

http://zone.ni.com/devzone/cda/tut/p/id/3450

Yep that is all I would do. Short out pins 2 & 3, then in hyperterminal you should see the letters you type appear.

http://www.twin-turbo.co.uk
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A man without a project is like a like a woman without a shopping list.

sure your baud rate is set up correctly, hyperterminal may not default to what you need.

"Cars are a lifetime of pain"

if you have the fifo buffers engabled, try turning them right down or disabling them, it can play havoc with real time data streams and some legacy stuff sure youll find it in my computer - device manager - serial port

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Well, it was working all along - I was just being a dumbass and still had it looking for a CAN signal rather than Autosense... I did the stuff in the link above, which was very useful! Thanks

WTF,

i'm trying to get my coms working and i am getting they typed letters appear with or without 2&3 linked, infact the are still apearing if i pull the 232 adaptor

thats cause you have an option to "echo characters locally" or something checked in hyperterminal :) un-check it.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

hmmmm,

with it unchecked i get back what i type in, with it checked ii ggeett tthhiis bbaacckk,,

weird thing is tho, bothe the above apply whether i have anything plugged into the 232 port or not, making the test bollocks,

its as if the problem is in the laptop,

That's likely because it's not a real physical com port but a loop back com port. This is used for testing and can't be used for comm. Your actual com port is on another number.

Jean

http://www.jbperf.com/

thats interesting Jean,

I wasnt aware of loopback ports, i did try it with various com ports, the ones it has worked on and others too,

also tryed the fifo bufferes on and off ect,

I finally decided it must be somthing screwy in the laptop, or install as the usb ports have always been a bit fritzy

anyway its now suffered terminal impact induced hard drive faliure....