snipped-for-privacy@hotmail.com (HG) wrote in news:47822c89.0405130807.6dc50533 @posting.google.com:
How about half-duplex RS232? If you don't have a UART available it's not too difficult in software - just sample at about 6 to 8 times the baudrate and allow for not sampling precisely at the edges of the signal. Of course, this can get a bit intrusive for your system timing, but it's doable, I seem to remember 9600baud on an 8MHz PIC wasn't too much of a strain - sorry, I don't have the code, this was something I was using about ten years ago.
Peter. (posted without apology for cloyingly personal anecdote)
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.