This project
produces a number of effects on a set of three LEDs. You can also
produce your own sequence and store it.
LED FX built on
matrix board
This project takes the place of a number of flashing
circuits and can be set so that any of the sequences will show when the
circuit is first turned on.
The main purpose of the project is to teach programming, however it also
offers a challenge to constructors as it is laid out on matrix board,
using surface-mount components. .
We have used SM components for convenience AND for ease-of-use. Once you start using them you
will never go back to through-hole components. They are smaller, neater
and make a very compact design.
They also make the project look simpler as they "disappear" under the
board; or if you are developing a single-sided project, they reduce the
size of the final design appreciably.
So, we have two areas of interest. Constructions and programming and
it's up to you to take it on.
The project is designed for all sorts of uses, including models such as
train layouts, alarms and similar effects.
It can also be expanded to accept more LEDs and these can be placed
on a separate display board.
But the real thing we want to get across, is programming.
This is another example of using a simple 8 pin chip to provide a number
of features that would take many logic chips (such as counters and gates) and lots of components to
duplicate.
It also highlights our method of hand-coding as an effective way to
produce a program.
It is doubtful if the same effects could be produced on any of the
pre-packaged microcontroller modules, using a tiny 8 pin chip.
This project uses about 400 instructions to produce the effects and it uses the EEPROM to store the sequence
produced by the user (sequence 1) - and show it at turn-on.
In this respect, some of the sub-routines in the program are quite complex and suitable
for the advanced programmer. However, if you are a beginner, you can
read through the program and most of the sub-routines will be easy to
follow as each line of code is explained. You have to start somewhere
and this project offers a challenge.
Most projects with a program of this complexity are only available as a
pre-programmed chip or only the hex code is available. There is usually no
attempt at educating the reader in programming.
That's the difference between our projects and all others.
We offer a learning curve.
For every hour of effort you put into reading, building and using one of
our microcontroller projects, you get the experience of 100 hours of
effort that has been put into the design to make it appear simple.
All you have to do is start . . .
INSTRUCTIONS FOR USE
There are 12 sequences.
The first sequence can be created by the user. It currently produces a
very slow flash-rate as it has not be programmed. The other 11 sequences
are pre-programmed.
Turn project ON.
Push the first button (called SwA) and hold it down and the sequence will change
to the next sequence.
Release the button and allow the sequence to cycle.
Push SwA again and the sequence will change.
You need to allow each sequence to cycle with the button no-pressed and then push SwA and keep it pressed until
a new sequence shows. This is due to the debouncing in the program.
TO CREATE YOU OWN SEQUENCE.
1. Press SwA
and at the same time, turn project ON.
2. Release SwA and press the switches in any order (up to 15 steps).
A step or delay cannot be longer than 2 seconds as the program will
"time out." When finished, wait 3 seconds and the sequence will show on
the LEDs.
3. Turn project off and on. The new sequence will appear as the first
sequence.
TO MAKE ANY SEQUENCE THE FIRST SEQUENCE
Any of the sequences can be saved as the first
sequence, as follows:
1. Turn the project ON and increment the sequences.
2. To save the desired sequence, press SwB. The display will die.
3. Turn project OFF then ON. The desired sequence will show at
start-up.
4. To delete this feature, push SwC and at the same time, turn project
ON.
|
PROGRAMMING THE
CHIP
The kit comes with a pre-programmed PIC chip but if you want to program
your own chip or modify the program, the .hex file is available as well
as the assembly file, so you can see how the program has been written
and view the comments for each line of code.
The PIC12F629 is one of the smallest micros in the range but you will be
surprised how much can be achieved with such a tiny micro.
The program contains sub-routines to produce delays, sequences on the
display and both read and write EEPROM; jobs that require accurate code
- including a special sequence - called a handshaking sequence that
prevents the EEPROM being written due to glitches.
Even a program as simple as this is not easy to put together and to
assist in this area, we have provided a whole raft of support material.
Not only do we provide a number of programs with full documentation but
our approach to programming is simple.
It involves a method of "copy and paste" whereby sub-routines
are taken from previously written code and copied into your program. Any modifications are
made in very small steps so that each can be tested before adding more
code.
This is exactly how we produce a complex project. Each step is written
and tested before adding the next step.
This saves a lot of frustration as it is very easy to add a line
of code that is incorrect and get an unsuspected result.
If you follow our suggestions you will buy a programmer ("burner")
called a PICkit-2 if you are using a laptop. It is the cheapest and best on the market
and comes with
a USB
cable and 2 CD's containing the programs needed to "burn" the chip.
If you are using a desk-top and/or tower with a serial port, you can use
a cheaper programmer called MultiChip Programmer from Talking
Electronics. You
will also need NotePad2 to write your .asm program. This can be
downloaded from Talking Electronics website. You will use
LED_FX.asm or
LED_FX-asm.txt as a template for your
program, plus a 6 pin to 5 pin connector that fits between the burner
and the project. This is also available on Talking Electronics website.
As we said before, this project is for medium-to-advanced programmers as
it is very compact and does not have in-circuit programming pins.
To be able to modify the chip you will need a programming socket and
this can be obtained from one of our other projects that contains the 5
pins for in-circuit programming.
You can then put the chip into the other project to be programmed and
modified and re-fit it into this project for execution.
PROGRAMMING LANGUAGE
There are a number of kits, programs and
courses on the market that claim and suggest they teach PIC Programming.
Most of these modules and courses use a PIC microcontroller as the chip carrying out
the processes, but the actual programming is done by a proprietary
language invented by the designer of the course.
Although these courses are wonderful to get you into "Programming
Microcontrollers" they do not use any of the terms or codes that apply
to the PIC microcontroller family.
All our projects use the 33 instructions that come with the PIC
Microcontroller and these are very easy to learn.
We use the full capability of the micro and our pre-programmed chip is
less than the cost of doing it any other way.
In addition, anything designed via our method can be instantly
transferred to a PIC die and mass produced. And we use all the input
pins and all the memory of the chip. The other approaches
use less than 25% of the capability of the memory and one of the pins is not available.
In fact it would be difficult to reproduce this project via any of the opposition
methods. It would require a larger chip and more expense.
You can use our method or the opposition. Just be aware that the two are
not interchangeable.
Ours is classified as the lowest "form" (level) of programming - commonly called
machine code - invented in the early days of microprocessors - and now
called mnemonic programming as each line of code is made up of
letters of a set of words. The opposition uses a higher level language
where one instruction can carry out an operation similar to a
sub-routine.
But you have to learn the "higher level language" in order to create a
program. And this requires a fair amount of skill and capability.
It sounds great and it is a good idea. But if you want to learn PIC
programming, it does not assist you. It is "a step removed" from
learning PIC language. The other disadvantage of the opposition is the
"overhead." The 1,000 spaces allocated for your program is filled with
pre-written sub-routines. You may require only 10 of these sub-routines but ALL
of them are loaded in the memory space. And they take up all the memory.
You have no room for your own program.
To get around this the opposition uses the 128 bytes in EEPROM to deliver
instructions on how to apply the sub-routines. This provides about 30 powerful instructions using their
language called BASIC (or a similar language).
It's a bit like selling a diary filled with all the paragraphs you need
to express yourself, and leaving a few blank pages at the back for you
to write single lines such as: see page 24, paragraph 7, see page 63
paragraph 4, to create your diary entries.
It depends on how much you want to be in charge of writing a program. Using
our method is like writing your own auto-biography. Using the opposition
is like getting a "ghost writer."
When using a higher level language to create a program, you have absolutely no
idea how the code is generated for the micro.
In some of the developmental kits, the code is "locked away" and you are
NEVER able to access it.
Everything runs smoothly until a fault appears. With our method you can
see the code. With the other methods, you cannot see the code - it's
like doing key-hole surgery without the advantage of an
illuminated endoscope to see what you are doing.
Everything has its place and our method of hand-assembly is only
suitable for very small micros and you will eventually need to "learn a
high level language." The PIC12F629 has over 1,000 locations for code
and this equates to more than 20 pages when printed, so this is about
the limit to doing things by hand.
But our drive is to show how much can be done with the simplest devices
on the market, at the lowest cost.
Anyone can show you high-technology at a high price but this is not
where you start and this is not where you get enthusiasm.
We provide the things to get you started. That's the difference.
LED FX Circuit
The CIRCUIT
The circuit is very simple. It is
just 3 LEDs and 3 switches. All the work is done by the micro.
We have added a 5v regulator and diode so the project can be connected
to all sorts of voltages.
It will work on 6v if the regulator is removed or on 7v to 15v (AC or
DC) with the regulator fitted to the board.
This makes it suitable for a 9v battery or the AC supply from a model
railroad. I know you are going to say "it is inefficient using a 9v
battery" but it is convenient.
THE LEDs
The LEDs supplied in the kit are ultra high-bright white LEDs. They are
too bright to look at directly but can be used for all sorts of
applications and effects. You can change them to suit your own
application. SURFACE-MOUNT COMPONENTS
To make the PC board as small as
possible, we have used surface-mount components. Once you start
using SM components, you get hooked. Through-hole components
seem enormous. You will need fine tweezers to hold them in place while
one end is soldered.
Always use very fine solder as you only need very little for each
component and the main reason for adding extra is to take advantage of
the flux to clean the connection. Always solder resistors with the value
showing.
CONSTRUCTION
You can build the circuit on any
type of PC board and we have used a small piece of matrix board.
The kit of components comes with all the parts you need to get the
project working, including a pre-programmed chip and the matrix
board.
To modify the program you will need a PICkit-2 programmer and this comes
with 2 CD's containing all the software needed for In-Circuit
Programming.
You will also need a lead (comes with PICkit-2) to connect the programmer to your lap top via
the USB port and an adapter we call 6pin to 5 pin
Adapter to connect
the PICkit-2 to your project.
6pin to 5pin
Adapter
Adapter connected for In-Circuit Programming
(the chip is placed in another project for in-circuit
programming) Construction is on a
piece of matrix board 14 holes x 9 holes. These two drawings will
be sufficient to position and solder all the components:
LED FX components on Matrix board
Underside of board
The
PROGRAM
The program does a bit of
detecting when turned on. It detects to see if a bit has been set in
EEPROM to tell the micro to go to a required sequence or start with
sequence 1.
It also detects if switch A or C has been pressed at the instant the
project is turned on so that the micro is directed to the sub-routine
where the user-sequence can be entered or if the EEPROM bit is to be
cancelled.
All this gets done in the SetUp routine and then the micro goes to Main.
In Main, the program increments a "jump" file and calls a table where it
finds a directive to go to a particular sub-routine.
The sub-routine is executed and the micro goes back to Main where it
looks for a release of SwA. This forms part of a key debounce as the key
must be fully debounced as it is advancing the micro through the
sequences.
To provide a totally reliable debounce, the key is detected as not being
pushed for the duration of a whole cycle of a sequence and a separate loop is then executed where the key can be
detected as being pushed, to advance the program to the next sequence.
To create your own sequence as sequence1, the project is turned off and
SwA pressed while turning the project ON.
This sends the micro to a sub-routine called Attract.
As soon as SwA is released, the program starts to time the duration when
a switch is not pressed and it "times-out" after 2.5 seconds.
The program also times the duration when a LED is illuminated. It also
accepts 2 or 3 LEDs illuminated at the same time. These are all clever
instructions that need to be looked at to see how they operate.
Up to 15 steps can be entered and each step occupies three bytes. The
first value identifies the illuminated LEDs, the second byte identifies
the ON duration (in increments of 5mS) and the third byte identifies the
OFF time.
These 45 bytes are contained in files 30h to 5Fh.
When a switch is not pressed for 2.5 seconds, the program "times out"
and sends the values to the EEPROM. It then shows the sequence on the
LEDs.
If the project is turned off and on again, this sequence will be
displayed as sequence1.
To replace the sequence with something else, simply repeat the steps above.
If you want one of the pre-programmed sequences to appear each time the
project is turned on, simply advance through the sequences by
pressing SwA and when the desired sequence is playing, push SwB.
This will record your choice. Turn the project OFF then ON again and the
chosen sequence will be displayed.
To remove this feature, press SwC when the project is off and at the
same time, turn the
project ON.
All these feature have been added to the program, one at a time, and it
is important to add them in the correct order. For instance, you can only add a removal feature after the
initial feature has been produced. Reading and writing to the EEPROM is
a most complex operation and the instructions must be laid out as shown
in the program, as they include a hand-shaking sequence. When you need this
code it is copied and
pasted in its entirety, to prevent a mistake.
Nearly every instruction has a comment to explain not only what it does, but why it was chosen.
If you think you can start programming without reading programs from
other developers, you are wasting your time.
No individual can work how to do many of the tasks via the simplest set
of instructions and you will find some programmers have used complex
code to do the simplest task.
That's why you have to pick out the "wheat from the chaff" and
remember a good routine, while discarding the over-complex sets of code.
This brings up an important point.
Don't expect to be an A1 programmer in a week. It takes time to absorb
the skills of programming and it is really only understood by a
microscopic percentage of electronics enthusiasts. If you take it up and
understand it, you are one of the microscopic few.
It is a world that, once you are in, will open up a whole new field of
ideas and development.
It's like taking up a new spoken language and, in fact, a program reads
like a book, so the analogy is very close.
There are some very "clever" instructions such as XOR where you can
compare two files by using the XOR function and determine if they are
the same. And very powerful instructions such as djnz that decrements a
file and if it is zero, the micro jumps over the next instruction.
Other clever instructions transfer the contents of a file to another via
the "carry."
You cannot be expected to know these "tricks" unless you
study programming. That's why we are here.
Here are the files you will need:
LED_FX.asm
LED_FX-asm.txt
LED_FX.hex
;*******************************
;;LED FX.asm
; 11-3-2010
;*******************************
list p=12F629
radix dec
include "p12f629.inc"
errorlevel -302 ; Don't complain about BANK 1 Registers during assembly
__CONFIG _MCLRE_OFF & _CP_OFF
& _WDT_OFF & _INTRC_OSC_NOCLKOUT ;Internal osc.
;_MCLRE_OFF - master clear must be off for gp3 to work as input pin
;****************************************************************
; variables - names and files
;****************************************************************
temp1 equ 20h ;
temp2 equ 21h ;
temp3 equ 22h ;
temp4 equ 23h ;
jump equ 24h ;jump value for table1
fadeUp equ 25h
fadeDwn equ 26h
sequences equ 27h
sw_duration equ 28h
testing equ 29h
;****************************************************************
;Equates
;****************************************************************
status equ 0x03
rp1 equ 0x06
rp0 equ 0x05
GPIO equ 0x05
status equ 03h
option_reg equ 81h
; bits on GPIO
pin7 equ 0 ;GP0 LED C
pin6 equ 1 ;GP1 LED B
pin5 equ 2 ;GP2 LED A
pin4 equ 3 ;GP3 Sw A
pin3 equ 4 ;GP4 Sw B
pin2 equ 5 ;GP5 Sw C
;bits
rp0 equ 5 ;bit 5 of the status register
;****************************************************************
;Beginning of program
;****************************************************************
org 0x00
nop
nop
nop
nop
nop
SetUp bsf status, rp0 ;Bank 1
movlw b'11111000' ;Set TRIS GP0,1,2 out GP3,4,5 input
movwf TRISIO ;
bcf status, rp0 ;bank 0
movlw 07h ;turn off Comparator ports
movwf CMCON ;must be placed in bank 0
clrf GPIO ;Clear GPIO of junk
call _memory
btfss gpio,5 ;SwA to: "record new sequence"
goto record
btfsc gpio,3 ;SwC removes attract sequence
goto $+.10
movlw 0FFh
bsf status,rp0 ;select bank1
movwf EEDATA
bcf status,rp0 ;select bank0
movlw .101
bsf status,rp0 ;select bank1
movwf EEADR
bcf status,rp0 ;select bank0
call write
movlw .101
bsf status,rp0
movwf EEADR
bsf EECON1,0 ;starts EEPROM read operation. Result in EEDATA
movf EEDATA,w ;move read data into w
bcf status,rp0
xorlw .8 ;look for 8 - for Attract mode
btfsc 03,2
goto Attract_Seq ;selected sequence will appear first
goto Main
;****************************************************************
;* Tables *
;****************************************************************
table1 addwf PCL,F ;02h,1 add W to program counter
retlw .10 ;
retlw .50
retlw .30 ;
retlw .50
retlw .100 ;
retlw .40 ;program starts at bottom of table
retlw .10 ;
retlw .50
retlw .30 ;
retlw .50
retlw .60 ;
retlw .10 ;
retlw .50
retlw .10 ;
retlw .50
retlw .100 ;
retlw .20 ;
retlw .50
retlw .30 ;
retlw .50
retlw .70
retlw .60 ;
retlw .100 ;
retlw .50
retlw .100 ;
retlw .50
retlw .100 ;
retlw .70 ;
retlw .50
retlw .30 ;
retlw .50
retlw .70 ;
table2 addwf PCL,F ;02h,1 add W to program counter
goto seq1
goto seq2
goto seq3
goto seq4
goto seq5
goto seq6
goto seq7
goto seq8
goto seq9
goto seq10
goto seq11
goto seq12
;****************************************************************
;* Delays *
;****************************************************************
_xuS movwf temp2
_uS movlw .10
movwf temp1
decfsz temp1,f
goto $-1
decfsz temp2,f
goto _uS
retlw 00
_ZuS movwf temp2
goto $+2
goto $+2
decfsz temp2,f
goto $-3
retlw 00
_xmS movwf temp2
_x nop
decfsz temp1,f
goto _x
decfsz temp2,f
goto _x
retlw 00
;5mS delay for increments in timing for "New Sequence"
_5mS movlw 05h
movwf temp2
_5 nop
decfsz temp1,f
goto _5
decfsz temp2,f
goto _5
retlw 00
_10mS movlw 0Ah
movwf temp2
_10 nop
decfsz temp1,f
goto _10
decfsz temp2,f
goto _10
retlw 00
_50mS movlw .50
movwf temp2
_50 nop
decfsz temp1,f
goto _50
decfsz temp2,f
goto _50
retlw 00
_100mS movlw .100
movwf temp2
_100 nop
decfsz temp1,f
goto _100
decfsz temp2,f
goto _100
retlw 00
_150mS movlw .150
movwf temp2
_150 nop
decfsz temp1,f
goto _150
decfsz temp2,f
goto _150
retlw 00
;****************************************************************
;* Sub Routines *
;****************************************************************
_memory
movlw .48
movwf temp1
movlw 2Fh
movwf fsr
incf fsr,f
movlw 0FFh
movwf indf
decfsz temp1,f
goto $-4
retlw 00
;SwB puts current sequence into EEPROM for turn on.
;and puts "marker" in location 101
Attract
movf sequences,w ;put sequence number into w
bsf status,rp0 ;select bank1
movwf EEDATA
bcf status,rp0 ;select bank0
movlw .100
bsf status,rp0 ;select bank1
movwf EEADR
bcf status,rp0 ;select bank0
call write
movlw .8
bsf status,rp0 ;select bank1
movwf EEDATA
incf EEADR,1
bcf status,rp0 ;select bank0
call write
nop
goto $-1 ;Project must now be turned off
;Seq selected as Attract will be displayed when project turned on
Attract_Seq
movlw .100
bsf status,rp0
movwf EEADR
bsf EECON1,0 ;starts EEPROM read operation. Result in EEDATA
movf EEDATA,w ;move read data into w
bcf status,rp0
movwf temp4
movf temp4,w
call table2
goto $-2
;record new sequence - looks for "no switch pressed" for 1.25 seconds to exit
;uses files 30h to 5Fh (48 files)
;three files per "step" 1st file = LEDs, 2nd = Off time, 3rd = on time
;15 steps allowed - look for 5Dh
record btfss gpio,5 ;wait for release of button A
goto $-1
movlw 30h
movwf fsr ;start storage at file 30h
;look at keys being pressed - identifies 2 or 3 keys pressed together
_r1 clrf sw_duration
_r1a call _5mS
incfsz sw_duration,1 ;5mS x 256 = 1.25seconds
goto $+2
goto Store ;time out! store files 30h to 5Fh in EEPROM
btfss gpio,5 ;see if one or more Sw is pressed
goto $+5
btfss gpio,4
goto $+3
btfsc gpio,3
goto _r1a ;no sw pressed create 2.5 sec timing
;1,2,or 3 sw pressed
call _10mS ;delay to detect 2 or 3 switches
incfsz sw_duration,1
goto $+2
goto Main
btfsc gpio,5 ;SwA
goto $+2
bsf gpio,0 ;turn on LED A
btfsc gpio,4 ;SwB
goto $+2
bsf gpio,1 ;turn on LED B
btfsc gpio,3 ;SwC
goto $+2 ;
bsf gpio,2 ;turn on LED C
;LEDs have been illuminated
movf gpio,w
movwf indf ;w moved to fsr's file (30h+)
incf fsr,f
movf sw_duration,w ;off time!!
movwf indf ;w moved to fsr's file (30h+)
incf fsr,f
clrf sw_duration
_r2 call _5mS
incfsz sw_duration,1
goto $+2
goto record ;time out! keys pressed too long. Start again
btfss gpio,5
goto _r2 ;sw pressed
btfss gpio,4
goto _r2 ;sw pressed
btfss gpio,3
goto _r2 ;sw pressed
;file empty. Put duration into file
movf sw_duration,w ;on time
movwf indf ;w moved to fsr's file (30h+)
incf fsr,f
movlw 5Dh
xorwf fsr,w
btfss 03,2
goto $+2
goto Store ;stop at 15 steps. store files 30h to 5Fh in EEPROM
clrf gpio
goto _r1
;sequences:
;seq1 Self-Programmed sequence
;1St file:LEDs 2nd file:OFF time 3rd file:On time
seq1 bsf status,rp0
clrf EEADR
bcf status,rp0
bsf status,rp0
bsf EECON1,0 ;starts EEPROM read operation. Result in EEDATA
movf EEDATA,w ;move read data into w
bcf status,rp0
movwf gpio
bsf status,rp0
incf EEADR,1
bsf EECON1,0 ;
movf EEDATA,w ;move read data into w
bcf status,rp0
movwf temp4 ;this is OFF time. Store it
bsf status,rp0
incf EEADR,1
bsf EECON1,0 ;
movf EEDATA,w ;move read data into w
bcf status,rp0
movwf sw_duration ;this is ON time
call _5mS
decfsz sw_duration,1
goto $-2
clrf gpio
call _5mS
decfsz temp4,f ;create OFF duration
goto $-2
bsf status,rp0
incf EEADR,1
bsf EECON1,0 ;
movf EEDATA,w ;move read data into w
bcf status,rp0
xorlw 0FFh ;look for 0FFh - end of routine
btfss 03,2
goto $-31
retlw 00
;seq2 chase right - very fast
seq2 bsf gpio,0
call _100mS
bcf gpio,0
bsf gpio,1
call _100mS
bcf gpio,1
bsf gpio,2
call _100mS
bcf gpio,2
call _100mS
clrf gpio
retlw 00
;seq3 chase right
seq3 bsf gpio,0
call _150mS
bcf gpio,0
bsf gpio,1
call _150mS
bcf gpio,1
bsf gpio,2
call _150mS
bcf gpio,2
call _150mS
clrf gpio
retlw 00
;seq4 chase right with off-delay at end
seq4 bsf gpio,0
call _150mS
bcf gpio,0
bsf gpio,1
call _150mS
bcf gpio,1
bsf gpio,2
call _150mS
bcf gpio,2
call _150mS
retlw 00
;seq5 left right left right
seq5 bsf gpio,0
call _150mS
bcf gpio,0
bsf gpio,2
call _150mS
bcf gpio,2
retlw 00
;seq6 middle on middle off
seq6 bsf gpio,1
call _150mS
bcf gpio,1
call _150mS
clrf gpio
retlw 00
;seq7 All on all off
seq7 clrf gpio
call _150mS
decf gpio,f
call _150mS
clrf gpio
retlw 00
seq8 ;seq8 middle on then sides on
bsf gpio,1
call _150mS
bcf gpio,1
bsf gpio,0
bsf gpio,2
call _150mS
clrf gpio
retlw 00
;seq9 police flasher 3 times left 3 times right
seq9 bsf gpio,0
call _50mS
bcf gpio,0
call _50mS
bsf gpio,0
call _50mS
bcf gpio,0
call _50mS
bsf gpio,0
call _50mS
bcf gpio,0
call _50mS
bsf gpio,2
call _50mS
bcf gpio,2
call _50mS
bsf gpio,2
call _50mS
bcf gpio,2
call _50mS
bsf gpio,2
call _50mS
bcf gpio,2
clrf gpio
call _50mS
retlw 00
;seq10 random flicker
seq10 movlw .32 ;start at bottom of table
movwf jump
bsf gpio,1
movf jump,w ;put table jump value into w
call table1
call _xmS
bcf gpio,1
decfsz jump,f
goto $+2
retlw 00 ;top of table found
movf jump,w ;put table jump value into w
call table1
call _xmS
goto $-11
;seq11 slow fade up down
seq11 clrf fadeUp ;
clrf fadeDwn
incf fadeUp,f ;to create 1 (delay routine does not like 00)
bsf gpio,1
movf fadeUp,w
call _xuS
bcf gpio,1
movf fadeDwn,w
call _xuS
decfsz fadeDwn,f ;
goto $-8
incf fadeDwn,f ;to produce 1
bsf gpio,1
movf fadeUp,w
call _xuS
bcf gpio,1
movf fadeDwn,w
call _xuS
decf fadeUp,f
incfsz fadeDwn,f
goto $-8
clrf gpio
retlw 00
;seq12 fast fade up down
seq12 clrf fadeUp
clrf fadeDwn
incf fadeUp,f ;to create 1 (delay routine does not like 00)
bsf gpio,1
movf fadeUp,w
call _ZuS
bcf gpio,1
movf fadeDwn,w
call _ZuS
decfsz fadeDwn,f ;
goto $-8
incf fadeDwn,f ;to produce 1
bsf gpio,1
movf fadeUp,w
call _ZuS
bcf gpio,1
movf fadeDwn,w
call _ZuS
decf fadeUp,f
incfsz fadeDwn,f
goto $-8
clrf gpio
retlw 00
;Store Store the 15 steps in EEPROM
Store bsf status,rp0 ;select bank1
clrf eeadr
bcf status,rp0 ;select bank0
movlw .48
movwf temp1
movlw 2Fh
movwf fsr
incf fsr,f ;fsr starts at file 30h
movf indf,w ;retreive data in file 30h
bsf status,rp0 ;select bank1
movwf eedata ;
bcf status,rp0 ;select bank0
call write
bsf status,rp0 ;select bank1
incf eeadr,1
bcf status,rp0 ;select bank0
decfsz temp1,f
goto $-10
goto Main
write bsf status,rp0 ;select bank1
bsf eecon1,wren ;enable write
movlw 55h ;unlock codes
movwf eecon2
movlw 0aah
movwf eecon2
bsf eecon1,wr ;write begins
bcf status,rp0 ;select bank0
writeA btfss pir1,eeif ;wait for write to complete
goto writeA
bcf pir1,eeif
bsf status,rp0 ;select bank1
bcf eecon1,wren ;disable other writes
bcf status,rp0 ;select bank0
retlw 00
;****************************************************************
;* Main *
;****************************************************************
Main clrf sequences
movf sequences,w
call table2
btfss gpio,5 ;Is swA still pressed?
goto $-3 ;SwA still pressed
movf sequences,w ;SwA released
call table2
btfss gpio,4 ;SwB puts current sequence at turn-on
goto Attract
btfsc gpio,5
goto $-5 ;SwA not pressed
incf sequences,f
movlw .12
xorwf sequences,w
btfss 03,2
goto $-12
goto Main
;****************************************************************
;*EEPROM *
;****************************************************************
org 2100h
END |
GOING
FURTHER
We have not produced all the
possible sequences and you can add more by simply creating
a new sub-routine.
You need to add it to the table and make sure you end it with retlw 00
to send the micro back to Main.
We have provided all the hardware and software for you to do this. Now
it's now up to you.
|
3
- 82R (820) SM
resistors
3 - 47k (473) SM
resistors
1 - 100n SM capacitor
1 - 100u electrolytic
1 - SPDT mini slide switch
1 - 8 pin IC socket
1 - LM78L05 voltage
regulator
1 - PIC12F629 chip (with
LED_FX routine)
3 - super bright white LEDs
3 - mini tactile switches
1 - 9v battery snap
20cm fine enamelled wire
20cm very fine solder
1 - Matrix board 14 holes x
9 holes |
|
16/3/10 |