OSC freq / 4 / Baud Rate tells you how many cyles to wait between bits...

for example at 20 mhz

20,000,000 / 4 / 115,000 baud

= 43 cycles...you have to allow for your program time so this would be about
the highest youd go

its 43.47826 just for the picky...hehe..see yas

----- Original Message -----
From: "David Huisman" <david.huisman@ADVMININGTECH.COM.AU>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, September 27, 2000 3:33 PM
Subject: Dual UART


> Has anyone here implemented an application that uses both the on-board
UART
> and a bit bashed Serial port simultaneously on a PIC ?
>
> My particular interest is not loosing serial data coming in on the port
pin
> while the on-board UART can receive at any time.
> I need to determine how fast the bit bashed serial receive can run when
PIC
> is running from 20MHz Xtal. (I am using 16F876)
>
> The approach so far is to use RB0 interrupt to capture the Start bit then
a
> timer to verify start bit at T/2, then sample line every period T x 8 and
> finally the stop bit.
>
> Regards
>
> David Huisman
>
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