LED FX


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Kits are available for this project from Talking Electronics for $15.00 plus postage.
Plus you will need:
6pin to 5pin adapter @ $2.50

You will also need:
Chip Programmer - PICkit2 from Modtronix
(MPASM and MPLAB come with PICkit2)
and it includes USB lead


PIC12F629 Data Sheet (.pdf  4,926KB)
Instruction Set for PIC12F629
blank12F629.asm template

PIC12F629.inc

See more projects using micros:
Elektor,EPE,Silicon Chip

Notepad2.zip     Notepad2.exe 
Library of Sub-routines "Cut and Paste
"
Library of routines:   A-E   E-P    P-Z 
 

 

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.

 

LED FX
Parts List

Cost: au
$15.00 plus postage
Kits are available

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