using Com port for signalling - Page 4 - Electronic Circuits Projects Diagrams Free

xiptron · 29th June 2009, 09:15 AM

Ok. As an aside, is there a restriction on the length of the filenames? I have noticed that it doesn't seem to like long filenames. At the moment I'm sticking to three letters plus extension.

ccurtis · 30th June 2009, 03:29 AM

Ziptron, here are the mods for the 1 key to force DSR.

With regards to your last question, there is a filename limitation of 8 characters.

Best wishes

xiptron · 30th June 2009, 05:12 AM

Have fitted 10k pulldown resistor. See next post.

xiptron · 4th July 2009, 03:43 PM

Pin 7 RTS is +12v continuously so I'm taking my output from Pin 4 DTR which is normally -12v, going +12v on trigger. Pin 6 DSR is about +200mV without the resistor but about -3.3v when connected to Pin 4 DTR via the 10k. Are these voltages what you'd expect?

I'll be watching for false triggers but hopefully there won't be any now.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar
Title	Starter	Forum	Replies	Latest
programmer serial port vs. laptop with usb port	crys	Micro Controllers	9	18th January 2008 01:52 PM
Signalling rate & data transfer rate?	Celestie84	General Electronics Chat	2	17th June 2004 07:36 PM
Operate a relay from a PC port RS232 or Parallel port	Eddie ESV	Electronic Projects Design/Ideas/Reviews	2	12th June 2004 08:43 AM
[ann] COM Port Toolkit - serial port monitoring on Win32 PCs	MGolikov	Electronic Projects Design/Ideas/Reviews	0	6th April 2004 07:17 AM
Designing a circuit to convert game port to serial port	Diluka Moratuwage	General Electronics Chat	1	29th July 2003 05:40 PM

29th June 2009, 09:15 AM	#46
xiptron	Ok. As an aside, is there a restriction on the length of the filenames? I have noticed that it doesn't seem to like long filenames. At the moment I'm sticking to three letters plus extension.

30th June 2009, 05:12 AM	#48
xiptron	Have fitted 10k pulldown resistor. See next post. Last edited by xiptron; 4th July 2009 at 03:24 PM.

4th July 2009, 03:43 PM	#49
xiptron	Pin 7 RTS is +12v continuously so I'm taking my output from Pin 4 DTR which is normally -12v, going +12v on trigger. Pin 6 DSR is about +200mV without the resistor but about -3.3v when connected to Pin 4 DTR via the 10k. Are these voltages what you'd expect? I'll be watching for false triggers but hopefully there won't be any now. Last edited by xiptron; 4th July 2009 at 03:52 PM.