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1  Forum 2005-2010 (read only) / Forum / Re: quote button? on: October 30, 2010, 08:57:45 am
exactly, many forum softwares will only autoquote what is outside quote boxes too.
2  Forum 2005-2010 (read only) / Forum / quote button? on: August 10, 2010, 03:16:05 am
I feel really stupid for asking this, but, does this forum actually have a quote button on posts?  I cant seem to find it.  
3  Forum 2005-2010 (read only) / Forum / Re: Sticky posts on: November 15, 2010, 06:51:48 pm
Quote
Why are the moderators of this forum so afraid of sticky posts??

fixed.

It really does seem that the forums are a complete non priority to the arduino team, which a real shame given they could act as a hub for the currently scattered arduino community.
4  Forum 2005-2010 (read only) / Troubleshooting / Re: error: expected unqualified-id before 'volatile' on: September 04, 2010, 07:23:53 am
so, what is the purpose of this "PING" on the 1280?  The compiler obviously uses it for something, but what?
5  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Copy or Save option for Serial Terminal on: August 31, 2010, 07:19:27 am
I would like this, the aren't any good serial terminal programs for mac
6  Forum 2005-2010 (read only) / Interfacing / Re: Actual Rotation - Gyro & Accelerometer on: September 05, 2010, 02:59:57 am
Quote
Any help with making this?
http://www.starlino.com/imu_kalman_arduino.html
7  Forum 2005-2010 (read only) / Interfacing / Re: Actual Rotation - Gyro & Accelerometer on: September 04, 2010, 07:33:05 am
What you want is generally accomplished by what is called a "Kalman filter" (which isn't actually a filter at all, damn mathematicians always trying to confuse people...).  If you like maths as much as I do, you will now look this up and proceed to cry  ;D  :-[ .
8  Forum 2005-2010 (read only) / Development / software array size limitations? on: October 16, 2010, 04:45:27 am
I have just been testing a 64kB SRAM module for my arduino mega I built based on the atmega 1280's external memory interface.  However I seem to have hit some kind of software limitation in the arduino compiler.

This works fine:
Code:
unsigned char a [30000];

However this:
Code:
unsigned char a [60000];
gives me "error: overflow in array dimension"

Does anyone know what causes this?  Or what the exact size limit may be?

Thanks in advance.
9  Forum 2005-2010 (read only) / Development / Re: n*pulse counting with interrupt on: October 10, 2010, 07:00:12 am
well, it depends, can your design give up a precious timer to reduce program complexity?
10  Forum 2005-2010 (read only) / Development / Re: n*pulse counting with interrupt on: October 10, 2010, 05:17:43 am
read the atmega datasheet, it has counters with compare interrupts.
11  Forum 2005-2010 (read only) / Development / Re: Licensing Q's -- in general, and for LiquidCrystal on: September 09, 2010, 02:24:43 am
That will happen no matter what you do.  By keeping it closed you merely delay the inevitable.
12  Forum 2005-2010 (read only) / Development / Re: ANN: Python-on-a-Chip ported to Arduino Mega on: September 01, 2010, 04:33:37 pm
yeah, shame the mbed isn't open source.
13  Forum 2005-2010 (read only) / Troubleshooting / Re: Retrieing sketch from Arduino flash memory? on: September 30, 2010, 12:13:11 pm
Quote
Sanding of the case and reseting the fuse with an electron microscope and an ion beam will of course allow rereading with an ISP. But I would consider this cheating
This was the sort of method I was thinking about, I recall the being another one, but I can't find it now smiley-sad .

A for what the datsheet says, it also says
Quote
Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document
And even if atmel knew of a way to bypass their security, do you think they would go broadcasting it in their datasheets?

edit: ah ha, found it http://www.cl.cam.ac.uk/~sps32/mcu_lock.html It appears certain clock and power glitches can cause a protected chip to become unprotected.
14  Forum 2005-2010 (read only) / Troubleshooting / Re: Retrieing sketch from Arduino flash memory? on: September 29, 2010, 08:57:20 am
Quote
then the producer can set the AVRs fuses accordingly. This will make reading it with an ISP impossible.
not impossible, just difficult smiley
15  Forum 2005-2010 (read only) / Troubleshooting / Re: Voltage regulator damaged? on: August 18, 2010, 04:17:35 am
if it works on usb, but not external power, it is the regulator blown.

if you still need it to work on external power you could just build a small regulator circuit on a protoboard and connect the output to the 5v pin.
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