People,

I have posted the revelant files on my site. They can be found at:


http://www.asamicros.com/Pub/ProjectSource/kpaddxf.zip

http://www.asamicros.com/Pub/ProjectSource/kpaddwg.zip

http://www.asamicros.com/Pub/ProjectSource/kpadasm.zip

Rgds...

...Andy

At 11:35 20/03/99 -0500, you wrote:
>Dear PICsters,
>I have just finished a little PIC project, and I want to know whether or
not it would
>be appropriate to send the full listing which is about 40K to the PIC List.
>
>I do not currently have a web site that I can post the information on,
otherwise I would
>simply do so and post the URL.
>
>The code is heavily commented, so it might be useful for beginners and
others to look
>at to see an example of a complete project. The assembly code comments
include info
>on the actual hardware (very simple) and PIC pinouts used.
>
>I also have the printed circuit board layout and schematics and parts
placement
>diagrams all in one AutoCad DWG file, for those who have access to
AutoCad. I could
>convert this to DXF format if that would allow more people to use it.
>
>Here is a description of the circuit and software:
>
>The hardware consists of a PIC 16C84 or PIC 16F84, a 16 key xy matrix keypad,
>a 4.00 Mhz resonator with built-in caps, a red and a green LED, 2 330 ohm
>resistors, 1 4.7K resistor, 1 10K resistor, a printed circuit board, 10
pin header,
>one general purpose NPN transistor such as MPSA05, and one 5 V PCB DPDT
Relay.
>
>The PCB design also has a general purpose 5 volt regulator circuit on it
>to allow operation from a 12VAC wall-wart type transformer. This part of the
>circuit uses 4 1N4001 (or greater) diodes, a 220 ufd cap, a 10 ufd cap, and
>a 5 volt regulator such as a 7805.
>
>The keypad used is made by Grayhill and has an 8 pin connector on the
back. I believe
>that Jameco has the same keypad that I am using, but with a 9 pin connector
>(unless their catalog is in error and it is really an 8 pin connector). The
>keypad has 0-9 and also LOAD   CLR   ENT   RUN  and UP and DOWN arrows.
>
>The user gets the unit's attention and synchronizes the program by hitting
the CLR
>key. The CLR (CLeaR) key is handled special, and ANY time the CLR key is
>hit, it will cause the program to synchronize and begin regular entry. To
>indicate that a key is being pressed, the normally-on RED LED will go off
>for the duration of any keypress. When the CLR key is released the GREEN LED
>will flash once to indicate that the program is synchronized and ready for
>regular input.
>
>The user can now enter any one of eight valid entry code sets. Each entry
code
>may consist of from 1 to 8 digits, though the factory Mastercode will always
>be an 8 digit code. The user may use the digits 0-9 and the LOAD, UP and DOWN
>keys as part of the entry code. The CLR ENT and RUN keys may *not* be used
>as part of the entry code, as they have a special meaning.
>
>After entering the user-code, the user will normally press the ENT (ENTer)
>key. If the code entered was a valid code, then the red and green LEDs will
>flash back and forth for ten seconds. During this time the relay will be
>energized, and it's contacts may be used to activate a doorlock mechanism,
>for example. During the 10 seconds, the user may press and hold any key
>to extend the on-time of the relay. As soon as any key is *released*,
>the on-time of the relay will be immediately terminated. Thus the on-time

>can be made longer or shorter as desired.
>
>There are two special codes known as the Factory Mastercode and the User
>Mastercode. The Factory Mastercode is hard-coded into the chip and cannot
>be changed. The User Mastercode can be changed by the user.
>
>Whenever the user enters either of the Mastercodes, he/she may then hit
>the ENT key to activate the relay, OR they can hit the RUN key to enter
>the special MASTERCODE MODE. In Mastercode Mode the user can change or
>delete any one of 6 user-codes, and change or delete the User Mastercode.
>
>After entering either Mastercode and the RUN key, then the user should
>enter a single digit from 0-6, followed by LOAD and then the 1 to 8 digit
>code desired, and finally the ENT key to terminate this mode.
>
>If LOAD is followed immediately by ENT, then the desired code set will be
>deleted instead of entered.
>
>The load sets are 0-6. 1-6 represent regular user code sets. You might
>assign a different code set to each member of your family. (People like
>Andy Kunz will have to re-write the code to allow packed nibbles instead
>of the byte method I used. That would allow 14 user-codes and two
>mastercodes).
>
>Load set 0 is special. This will actually load in the User Mastercode.
>I strongly recommend using an 8 digit code for the Mastercode, but
>I wrote the program so that it allows any code from 1-8 digits in length.
>
>*****
>No attempt was made to make the code super-efficient. It occupies just
>a little less than 1/2 K of ROM space. So there is lots of room for
>others to add additional bells and whistles. There are two i/o ports
>left unused in the original design.
>
>There you have it, a short description of the KEYPAD PROJECT.
>
>So, should I post the 40K MPASM file to the PIC List, or would that be
>upsetting to many? If I post it, should the code be in the main body
>of an e-mail, or should I make it an attachment?
>
>I will wait until there are enough responses to arrive at some consensus.
>
>Hope this helps
>Fr. Tom McGahee
>