log status of RS232

[michal111cz]

Hi, I need to monitor and log the status of input pin RxD serial port
RS232. I need only status logical 1 and logical 0 in time. Im
searching for utility or script to log this info. Thanks for answers.
Michal

 

[Ian Stirling]

michal111cz <mbinder@centrum.cz> wrote:

Hi, I need to monitor and log the status of input pin RxD serial port
RS232. I need only status logical 1 and logical 0 in time. Im
searching for utility or script to log this info. Thanks for answers.

I don't think you can, easily, with the typical 8250 descendant found in
PCs.
Does it have to be RxD?

 

[Peter Bennett]

On 7 Jan 2005 11:35:46 -0800, mbinder@centrum.cz (michal111cz) wrote:

Hi, I need to monitor and log the status of input pin RxD serial port
RS232. I need only status logical 1 and logical 0 in time. Im
searching for utility or script to log this info. Thanks for answers.
Michal

You can't see the status of the receive data pin directly.

If you want to use the serial port as a digital input, use the input
handshaking pins, not the data pin.



--
Peter Bennett VE7CEI
email: peterbb4 (at) interchange.ubc.ca
GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html
Newsgroup new user info: http://vancouver-webpages.com/nnq

 

[j.b. miller]

chart recoder ?

 

[budgie]

On 7 Jan 2005 11:35:46 -0800, mbinder@centrum.cz (michal111cz) wrote:

Hi, I need to monitor and log the status of input pin RxD serial port
RS232. I need only status logical 1 and logical 0 in time. Im
searching for utility or script to log this info. Thanks for answers.

Unless the port is also being used for data reception, Peter's answer is the
method normally used.