We have been working on this with David for the last week day and the night. We built our own homemade switches, built a nice layout for the LEDs, wire up at least 100 wires to the board and tried to code it. Well it is working %20 percent is all I can say for tomorrow, I am still satisfied and want to finish this though. It was just not enough time literally. The current board has two chips one of which is a shift register basically try to run the LEDs as outputs.

According to other people’s experiences shift registers look not a bright solution at all, actually since starting of this project I can say I understand better now what in Tom’s book on the Chapter 14. It has been a great experience for me, I did take my lesson not to joke with LEDs more than 5 at first hand don’t try to mass product 25 custom switches it can take longer than you think, too much soldering causes temporary blindness.

The images are blurry but you can get the idea overall. The objective is to build 25 LEDs and 25 switches on bottom of those switches, the LEDs are controlled through shift registers, we were thinking to do the same with the switches as well, though Jeff Gray gave me a great tip to use with switches. It is called Ladder something, basically you hook up the switches with the resistors and make sure they are in series with each other, an d when some switch is 1 state you can get the resistance until to it and compare its value with the sum of the resistance and you can get which switch it is, it is supposed to be in Tom’s book as well.

The LEDs are going to sit on the plexiglass hopefully :) Check the pictures out!

I have emailed the Tuomo and learnt the spefics of the project, it seems they are going to publish the code and the schematics in the near future as he stated, also he gave me a tip controlling and programming 8×8 LED system. It is basically a MAX7219 LED display driver, I have just got the samples today, I need to dig this more, if I can figure out this proto sample code :sigh:

Oh one more thing, I really want this project to be a nice finished job so that I am thinking to order this LED display system as well from Nexus Machines, UK. We will see, to make the code work is the first step.

onPress switch
checkit
if(1)
if on
get the value stored in a variable (this is going to be the value of the first led)
check one row up/down/right/left is on or off state
if on

check one row up/down/right/left is on or off state
get the value stored in a variable (this is going to be the value of the second led)
if on
break;
if off
check those variables are in a proper horizontal or a vertical axis at all.
if true
get the pin of the LED that can be pressed and store in a variable.
if false
break;

if off
break;
if off
break;
if(2)
if on
break;
if off
get the pin value from the global variable and light it and turn off the previous ones.

Here is the code I have for the proto type we are trying to prepare with David today. Basically It was supposed to be a working example of a 9 LED series, which are in a plus shape position, I have managed to make it work on the first move which is the middle is empty and you force your piece to go jump over the one below the middle, with your two switch. When I tried to extend the code for the second movement, it didn’t work out. I need to ask question regarding this.

TRISB = %11111111 ‘To keep all the PORTB as an input
TRISC= %00000000 ‘Same sense, PORTC is set to output.
TRISD = %11110000

state var word ‘State variable is there to be the flag.

PORTC = %11111011
PORTD = %11111111
main:

‘if switch bottom is pressed
if PORTB.0 then
‘put a flag that it is pressed with the state variable
state = 1
endif
‘ the middle button is pressed and our state is 1
IF PORTB.2 and state == 1 THEN
‘ do readfirst subroutine
GOsub readFirst
else

IF PORTB.3 and state == 2 then
state=3
endif
if portb.1 and state == 3 then
gosub readSecond
endif
endif
goto main

readFirst:
‘check if middle led is turned off

IF PORTC.2 == 0 then
‘if it is turned off then make the bottom led and the
one above it turned off
low PORTD.0
low PORTC.3
high PORTC.2
‘problem here, should I set the others led again to
high, because
‘they were high in the setup??
HIGH PORTC.0
HIGH PORTC.1
‘change our state to 2 in case not to worry about this
statement again
state=2
endif
return
‘this subroutine is making one of my leds going to 0 state, I suspect it is just processing its if statement ‘above and making this sub work and thus leaving my LED in that position.

readSecond:
if portc.1 == 0 then
low portc.3
low portc.2
high portc.1
state=3
endif
return

Basically the game consists of 32 holes on a circular plane that are on a plus grid and all the holes have their stone piece except the one in the middle. So what you should do to start the game is simple, just jump over one of the stones over another and put it on the piece-less hole and take the one that is jumped over. The objective is to do this action until you have the least stone as you can.

I prepared a brief project file about it, you can download it here(300kb, pdf) if you are interested.