RS232 (DB9) Cable Tester

Описание: RS232 Cable Tester
With 8 Char 7 Segments Displays
Link to Code and schematics :
https://drive.google.com/open?id=0B7I...

Next Versions one with be with lcd displays , and anther with PC graphical interface (processing Programming Lang)

Use , i use to work in control system and AV field since more then 10 years while Rs232 pin-out depend on the specs of the devices , many time we think the cable is cross while it is straight so why we dont make something to detect for us the type and connection of the cable.

in this Tester pinout are detected and listed even if the pin is not connected it shows 0 .
aka ,22,33,55 (cable is straight) pin 2 is connected to pin 2 in the other part of the cable .
20 ,33,55 (pin 2 is not connected) pin 3 is connected , pin 5 is connected .
23,32,55 (cable is crossed ) pin 2 is connected to 3 , pin 3 is connected to 2 , and pin 5 is connected to 5.

Any suggestion plz let me know!