Or you could just time the sender so that it send one byte every second.
Waiting for an acknowledge byte is not as fast as using a port pin to toggle
the data flow. In the PIC, when you receive a byte, set the DTR (or DSR or
RTS or CTS or whichever line the PC software respects, they are all
different in this regard) pin low (or high if it's inverted by the driver)
until you are ready for another one. The actual hardware handshaking does
take place in hardware so there is no way it can overflow the way software
handshakes can.
/\/\/\/*=Martin


----- Original Message -----
From: "Mike Blakey" <mike.blakey@BAESYSTEMS.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, February 25, 2002 12:42 PM
Subject: [PIC]:USART receiving data


> I'm doing a little project using an f876 storing and retrieving data (a
lookup
> table) into the EEDATA memory. The routine works fine, except for
receiving data
> from the PC. I send the data using VB6 MSComm1 but I get an overrun error
after
> about 4 bytes. even if I change the speed from 19200 down to 9600, exactly
the same
> thing happens. I have not got any hardware handshaking, so I am assuming
that I
> will have to handshake by sending back an acknowledgement byte before
sending the
> next byte down to the PIC. Am I missing something or is this the right
way? Thanks.
>
>
>
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