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1  Forum 2005-2010 (read only) / Playground Wiki / Re: Shield Pin Usage Table on: May 09, 2010, 11:36:06 pm
The chart version makes it a lot easier to see which shields conflict with other shields, so thanks for putting that format up for comparison to the original tables.

Do you foresee "Notes" in the left column, under the shield name (like you entered for the AsyncLabs WiShield 2.0)? Some of the notes in the table format are pretty extensive already, with more complex shields to come, I'm sure.
2  Forum 2005-2010 (read only) / Forum / Re: A home for neophytes on: April 22, 2010, 03:21:43 pm
Having returned from Abby's commercial break (spam reported for those who are not familiar with the board's reporting system)  ... back to our regular programming ...

YaBB Newbies

Things fall apart,
it's scientific

Posts: 48
[glow]Massachusetts, USA[/glow]
You may well find individual in-person help at the Boston Arduino Users Group Meeting, co-incidentally happening this evening. You will certainly find a friendly group of people who are enthusiastic about sharing their love of the platform with others., note the room change in reply #4.

It's a monthly get-together, so if this is too short of a notice, put it on your calendar for May.
3  Forum 2005-2010 (read only) / Forum / Re: Site content does not use the screen well on: March 21, 2010, 11:28:05 am
In the meantime, you can resize the message area by dragging the right or bottom border.
4  Forum 2005-2010 (read only) / Forum / Re: Faster Than A Blink on: December 22, 2009, 08:13:41 pm
There is a comprehensive discussion of "Maximum pin toggle speed" over at
5  Forum 2005-2010 (read only) / Forum / Re: "Best Platform" on: November 24, 2009, 09:07:38 pm
I may need to find a better tool than google reader for this type of feed.
Like David C, I find Thunderbird a very useful RSS processor. Even if you don't use it for E-mail, you can use it to monitor your feeds and have Thunderbird's filters and message rules organize topics into folders with highlighting and lots of other useful features for you.

There are probably lots of other open source RSS readers out there that would benefit from a better RSS feed from
6  Forum 2005-2010 (read only) / Troubleshooting / Re: conways game of life and mstimer2 , 328 on 0018ide on: May 20, 2010, 11:35:56 am
It displays [glow]three columns more than the rest[/glow] and when it finishes doing its thing like its supposed to it then displays them permenantly.
Well, you managed to completely lose me with that one.

like i said it works fine with your test software etc.
That's good. Except that I never posted any test software.

also i moved the code underneath void loop instead cos it didnt work under void setup.
So now it is working with the interrupt initialization in loop() when you reported in Reply #5 that it was not working with it there. At least it is working for you now.
7  Forum 2005-2010 (read only) / Troubleshooting / Re: conways game of life and mstimer2 , 328 on 0018ide on: May 20, 2010, 09:34:03 am
Move it directly underneath void setup () {
8  Forum 2005-2010 (read only) / Troubleshooting / Re: conways game of life and mstimer2 , 328 on 0018ide on: May 18, 2010, 11:02:25 pm
PaulS is right, the code that establishes the interrupt routine should go somewhere in setup(), as noted in reply #1. However, once the interrupt is established, re-establishing the same interrupt the same way over and over again inside loop() should not affect the rest of the logic or the display.
[edit]Hmmmm. Unless re-setting up an interrupt before it has a chance to fire keeps it from firing even the first time. So make the software change first -- move the highlighted lines of your code to the beginning of setup() -- and if things work after that you're all set, otherwise, continue with the rest of this reply.[/edit]

The matrix is directly connected to the output pins as shown in the example with the mod board(or whatever its called).
Your matrix may be wired incorrectly. Can you please provide
  • a link to the example you mentioned (I have no clue which example you're looking at)
  • a link to the data sheet for the LED matrix you have (it may be a different brand or model than the one in the example you are looking at)
  • a list of which of your Arduino pins is connected to which LED matrix pin, in the following form:
   Arduino digital pin 0 - no connection
    Arduino digital pin 1 - no connection
    Arduino digital pin 2 - LED matrix pin #__
    Arduino digital pin 3 - LED matrix pin #__
    Arduino digital pin 4 - LED matrix pin #__
    Arduino digital pin 5 - LED matrix pin #__
(I will verify row/column attachments with the data sheet and the code)
9  Forum 2005-2010 (read only) / Troubleshooting / Re: conways game of life and mstimer2 , 328 on 0018ide on: May 16, 2010, 09:11:35 pm
[edit]The new problem is that [glow]it[/glow] tries to use com1  serial port to output[/edit]
I don't understand. "It" probably doesn't mean the sketch, since there are no serial commands there, and the sketch does not use digital pin 0 or 1. Does "it" refer to the Arduino IDE? If so, pull down Tools > Serial Port and select your com10 port before uploading. Com10 will only be available in the list when your Arduino is connected to your computer via the USB cable.

Can you post your operating system and version if that is not the solution?
10  Forum 2005-2010 (read only) / Troubleshooting / Re: conways game of life and mstimer2 , 328 on 0018ide on: May 13, 2010, 09:23:19 am
I have had success using the Timer1 library with that code.

You can find the Timer1 library at The "install instructions" on that page are no longer valid for IDE 0018, so create a TimerOne (note the spelling) directory in the libraries folder. Download the zip file and put the TimerOne.h and TimerOne.cpp files from it into that new directory.

Change your
   #include <MsTimer2.h>
   #include <TimerOne.h>
and add the following code somewhere in setup().
 // Establish an interrupt
  Timer1.initialize(100); // interrupt every 100 microseconds
  Timer1.attachInterrupt(display); // control will go to the display() function when the interrupt happens

Your code compiles with those changes, but I don't have a spare LED matrix to test with. Let us know how it goes, for the benefit of the next person to find this thread through a search of some kind.
11  Forum 2005-2010 (read only) / Troubleshooting / Re: HELP: Matrix Display on Conways on: May 20, 2010, 11:48:01 am
The data sheet and the list of connections you included in your first post show that you are good to go with the software and the wiring set for the green side of your dual color LEDs.

I am not experienced with the FrequencyTimer2 library. There is another thread with a similar problem at Maybe you can use code from there if you are willing to change to the Timer1 library.
12  Forum 2005-2010 (read only) / Troubleshooting / Re: Best Linux to use?? on: May 17, 2010, 10:35:51 pm
Ubuntu 9.10 32 bit with the Arduino-0018 package from the Arduino on Ubuntu packagers (wayoda, et. al.).  (Thanks, nice work!)

It's the first entry at
13  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Pro Mini Problems - Help please on: May 09, 2010, 12:08:01 am
Yes, that was my point exactly, CB. Your question was posted here after the OP had supplied an answer for it in the other thread! I also saw the OP come and go after my second reply over there. You would think there would be a close-out from him as to whether or not that was his solution.
14  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Pro Mini Problems - Help please on: May 08, 2010, 11:50:08 pm
Grrrrrrrrrrr!  >smiley-sad  Crossposted with I know the OP couldn't tell if it was a hardware or a software problem originally (or was it an attempt at a 6 hr. "bump"??), but it still wastes people's time to post the exact same question in two threads. A followup question (now deleted) came into this thread after the OP had replied with an answer in the other thread.
15  Forum 2005-2010 (read only) / Troubleshooting / Re: polyphony? on: January 04, 2010, 09:31:02 pm
bhagman from this forum created a tone generation library that will play more than one tone at a time through software.

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