----- Original Message -----
From: Harold Hallikainen <haroldhallikainen@JUNO.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, October 16, 2000 11:17 PM
Subject: [PIC]: Bidirectional serial?


>         I'm considering using the UART in a PIC for a simple master/slave
> network between two PICs. I'm hoping to send data half-duplex on one
> wire. I'm thinking of just tying the Tx and Rx pins together. Normally
> the TRIS bit on the transmit line would be high. When a PIC needs to
> transmit, I'd set the TRIS low, send the data, then put TRIS high again.
> Will that work? Does a high TRIS float the USART transmit pin?

Unfortunately, contrary to what you might glean from the datasheets, it
doesn't seem to. :-(

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)

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