And I wrote a little about the subject here: http://www.argentdata.com/support/usb.html
Yes, USB is a serial protocol, but so is Ethernet, and I'd say USB (being host-centric and in general more complicated) is even less like RS-232 than Ethernet is. RS-232 just tells you how to spit bytes out on a wire and frame them with start and stop bits. A 'break' is the only out-of-band signal in RS-232. USB defines multiple transfer types, complicated device enumeration schemes, power negotiation, sleep modes, plug-and-play device detection, hubs, and a ton of other things I'm forgetting right now. Scott James Ewen wrote: > > > On Sun, Dec 6, 2009 at 6:20 PM, John Salyer <[email protected] > <mailto:w3ma%40arrl.net>> wrote: > > > About a year and a half ago, I bought a UT-41 GPS receiver to use with a > > computer. It has a USB outlet. Can I chop the connector off, find out > > what the four wire are. Two are for voltage, the other two +d and -d. > > Can I connect these to a serial input? > > Sure you can... it just has to be a Universal Serial Bus input... the > easy way to do that is to grab that connector you chopped off, and > reconnect it back to the cord you have hanging there. Then you can > plug it back into the USB port on your computer, and have a working > USB GPS again. > > USB is not RS-232. RS-232 is not USB. > > Wikipedia has a good page to start you out on learning about some of > the multitude of serial communication protocols out there... > > http://en.wikipedia.org/wiki/Serial_communication > <http://en.wikipedia.org/wiki/Serial_communication> > > We are even using a serial communications mode right now, as I am > typing characters in a serial format, and you are reading them in a > serial format. > > James > VE6SRV > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/tracker2/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/tracker2/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
