Hook your reset button to both the MCLR and a input port, then just check the pi
n
on startup.

Steve
---------------Original Message---------------
Hello,

I'm using the PIC 16C84 in a control application,  and since the
software is yet a bit unstable,  I have added a RESET button to let
the user (that is, me) restart the program when it has lost track of
what is happening.  I don't use the WDT for this since the control
program is actually running.  It has only missed a few input signals
that makes it out of phase.

When the program starts,  it has to initialize a few other components
(an LCD and also some mechanical units),  which takes a few seconds.

What I want to do is to detect after a reset if the reset is due to me
pressing the button (connected to the MCLR pin), or due to power-up.
If I could only change the TO or PD bits in the status register, this
would be a simple task, but since I can't I don't know how to do this.

Any suggestions?  (please don't ask me to fix the program... I'm
trying to!)

Thanks,
        Staffan


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