> I am new to PICs and electronics.
>
>  I have managed (after many attempts with the help of you people )  to
> programme a PIC to  read a voltage  from a port through AD converter
> (PIC16C71) use calibration constants to give pressure in mbars and store
> those  readings in the data memory.....Could someone please explain to me
in LAYPERSON terms how can I
> extract these data using a Personal Computer?.....Jagath

Hi Jagath-

For an excellent reference at interfacing between hardware and PC's-- see
"Build your own Low-Cost Data Acquisition and Display Devices" by Johnson.

This is VERY readable, thoroughly covers serial and parallel interfaces
including
source code for polled and interrupt , and also covers A/D and D/A
conversion in lay terms.  In the U.S. I
purchased it at a local bookstore for U.S. $21.95.  It is published by Tab
Books:  ISBN 0-8306-4348-6.   I've been able to use the code in the Win '95
environment running in 16 bit mode.  If you must use a 32 bit compiler or
run under Win NT
it can get much trickier for using the parallel interface in bi-directional
fashion.  I've
read that you need to write a special driver but haven't investigated this
much further
(except for learning how to do NT VDD drivers for another assignment at
work but
that's another story!).  The serial interface should work fine unless you
want to use some of
the extra "handshake" lines for other control purposes.

Anyway- the text is really worth the money in my opinion.

-Steve Henry