Does anyone know if it's possible to get two rs232 signals (operating at the same speed) to feed into 1 uart.
(I only have one uart pin free). When I connect them together they don't seem to work..
Thanks
Jay
No, it isn't.
universal ASYNCHRONOUS receiver transmitter
Have you tried one of the software UARTs?
When I connect them together they don't seem to work.
No surprise there, and possibly damaging the devices generating the signals.
You can add extra hardware to multiplex the signals but no way you can just connect them together.
Rob
If the signals are ttl, then depending on just what you are trying to do, you may be able to parallel the inputs.
Yeah, I didn't know about the extra hardware.
Live and learn. I found a good explanation of what I need to do.
For anyone else who has this problem,...check out this link. It explains how to get multiple RS232 signals into one uart.
http://www.atlas-scientific.com/_documents/Application_Note_stamps_001.pdf
Yeah, I didn't know about the extra hardware.
That hardware may be a bit of overkill depending what you want to do. I'd just isolate the remote gizmos tx lines from each other by using a small signal diode on each one. The remotes can't transmit at the same time to prevent interfering with each other, but otherwise it should work.