>Do you use interrupts on the RX pin?

>No interrupts in use today on RX pin  but I agree it would make sense to
move to an interrupt based scheme for the RX routine...


I prefer using a fixed interval over-sampling of the RX pin in a timer
interrupt. This is typically the way that hardware UARTs work. You can get
good results with as little as 3x over-sampling, and great results with 6x.
Using this technique I was able to handle 8 simultaneous 9600 baud UART
receivers on a lowly PIC16F84.

One advantage of this technique is you don't get buried in interrupts if yo=
u
have noise on the RX pin (for example, if it comes from a radio).

-- Bob Ammerman
RAm Systems




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