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16  Community / Bar Sport / Re: Iteaduino BT V1.1 - Issues on: January 29, 2014, 05:44:28 pm
mrburnette is simply expressing an opinion that it is courteous to support this forum by purchasing some of the official hardware.

There is no requirement to do this, however it is a reasonable opinion for him to hold.
17  Community / Bar Sport / Re: Are the forums open or not? on: January 29, 2014, 05:36:53 pm
The point is the policy isn't clear.  Can you quote "someone with authority" that clearly states the policy?
If the forums really are open then, I think "someone with authority" should state it clearly.  

It depends how you define "someone with authority". I am a moderator and have the authority to remove offensive posts.

I did a "sticky" about using the forum:

http://forum.arduino.cc/index.php?topic=148850.0

Nowhere does it mention that you need to own an Arduino.

It's commonsense, a bit isn't it? I mean, people posting about PIC boards are directed to the PIC forum with good reason. Similarly we don't expect posts about Ford motor cars.

You don't need to tell mrburnette off for having an opinion. Did he direct it at you? Did he attack you? I don't see your name in that thread.

As far as I can tell the official Arduino position is that clones calling themselves an official Arduino are frowned upon because this is pure plagiarism, and a breach of trademark. To say nothing of deceiving purchasers.
18  Community / Bar Sport / Re: Are the forums open or not? on: January 29, 2014, 03:26:12 pm
The thread you linked was just the opinion of a forum member (not a moderator or administrator).

We do get quite a lot of questions from people who have saved a couple of dollars by getting a clone from eBay and then take up a page of (one or more) threads trying to get it to work, when the "real" one would work "out of the box" so you can see where some frustration might come from.

However I've done a lot of posts myself about making gadgets with the "pure" Atmega328 (and other) chips, which are not directly using an Arduino. No-one complains about them.

I don't know the point of your original post. If you can quote "someone with authority" who has directly told you not to post here, unless you  have purchased an Arduino (and how would they know?) please do so.

Quote
These forums could be hosted for < $1/mth. 

You must be jesting.

According to WolframAlpha the arduino.cc domain gets around 1.5 million hits a day. Its disk fills up annoyingly regularly as people post megabyte attachments of the schematics or photos of their projects.

You might want to also post a link to this "less than $1/month" web hosting site that would provide such hosting for a pittance.

I got a message from the forum administrator a while back (2012):

Quote
We have updated the servers and they are very fast now (and very expensive)…

So if you know of "very fast" servers which are only $1/month I suggest you write to the webmaster direct and let him know. Don't hold your breath waiting for a response.
19  Community / Website and Forum / Re: Error when trying to report a post to Moderator on: January 28, 2014, 04:21:59 am
Click on "report to moderator" to report this problem.

Oh, wait ...
20  Using Arduino / Programming Questions / Re: Reading an encoder using interrupts on: January 24, 2014, 02:51:17 am
Code:
char _lApin;
char _lBpin;
char _rApin;
char _rBpin;

According to the C++ standard, variables in the global namespace, starting with an underscore, are reserved.

Quote
17.4.3.2.1 Global names

Certain sets of names and function signatures are always reserved to the implementation:

Each name that contains a double underscore (_ _) or begins with an underscore followed by an uppercase letter is reserved to the implementation for any use.

Each name that begins with an underscore is reserved to the implementation for use as a name in the global namespace.
21  Using Arduino / Programming Questions / Re: Reading an encoder using interrupts on: January 24, 2014, 02:47:15 am
Code:
  _lft_ticks = _rht_ticks = _counter = 0;
  _error = false;

What's with the leading underscores? Wouldn't it be easier, and less work, and more readable, to omit them?
22  Using Arduino / Programming Questions / Re: [SOLVED] Why are this code destroying the bootloader?? on: January 22, 2014, 04:22:46 pm
Quote
I was told that Atmel made a mistake to implement the WDT in these chips.

Who told you that? The bootloader which is uploaded by my bootloader-uploader works even if you use the WDT.

The bootloader doesn't get "broken" by the code nor are the fuses. The problem is simply that the WDT cuts in during the bootloader operation. A change to the bootloader to prevent that is all that is required.
23  Using Arduino / Programming Questions / Re: Interrupt performance? on: January 20, 2014, 05:46:15 pm
http://www.gammon.com.au/interrupts

You can use the timers/counters to measure small intervals.

http://www.gammon.com.au/forum/?id=11504
24  Using Arduino / Programming Questions / Re: Why are this code destroying the bootloader?? on: January 20, 2014, 04:29:02 pm
Some bootloaders do not handle the WDT correctly. I believe the one on my page below will upload the correct bootloader:

http://www.gammon.com.au/forum/?id=11635

25  Using Arduino / Displays / Re: Turn your Uno into a VGA output device! on: January 15, 2014, 04:57:03 pm
See further down the page on my forum for the colour version. That uses a tight loop to clock pixels, but I only got 60 pixels horizontally that way.
26  Using Arduino / Displays / Re: Turn your Uno into a VGA output device! on: January 15, 2014, 04:55:37 pm
I don't know if you can easily achieve that. The ratio of 16 clock cycles per 8 pixels is because the hardware clocks out SPI at CLK/2. If you changed that (eg. CLK/4) you would get 32 clock cycles per 8 pixels.
27  Using Arduino / Programming Questions / Re: X, Y, Z coordinates on: January 13, 2014, 03:55:33 am
An 8x8 matrix does not have any obvious logical mapping to a 4x4x4  cube, 

Apart from the fact that they both have 64 LEDs.
28  Using Arduino / Programming Questions / Re: Integrating Code for a Begginer on: January 13, 2014, 03:43:18 am
While I expect that the site has useful information (Nick's sites usually do), that doesn't say anything about what you expect to see happen nor does it say anything about what actually happens.

Thank you, Paul.

Unfortunately the OP cannot upload his code, as he has privately informed me, because the Arduino forum's disk is full.

Sadly, although we have reported that problem it has not been resolved. It must be a fairly complex issue.

Unfortunately it is hard to help you when the forum is working so badly. Sorry about that.
29  Using Arduino / Microcontrollers / Re: Ariadne bootloader burn problem on Mega (Uno used as ISP) on: January 12, 2014, 09:27:58 pm
Well that's true, and my bootloader-uploader has that coded into it, eg.

Code:
// see Atmega328 datasheet page 298
signatureType signatures [] =
  {
//     signature          description   flash size  bootloader size
...
 
  { { 0x1E, 0x95, 0x0F }, "ATmega328P",  32 * kb,       512,
        atmega328_optiboot,   // loader image
        0x7E00,               // start address
        sizeof atmega328_optiboot,
        128,          // page size (for committing)
        0xFF,         // fuse low byte: external clock, max start-up time
        0xDE,         // fuse high byte: SPI enable, boot into bootloader, 512 byte bootloader
        0x05,         // fuse extended byte: brown-out detection at 2.7V
        0x2F },       // lock bits: SPM is not allowed to write to the Boot Loader section.

You would need to get the the bootloader size right (in this case it is 512), the start address, and the fuses. See this for calculating fuses:

http://www.engbedded.com/fusecalc
30  Using Arduino / Microcontrollers / Re: Ariadne bootloader burn problem on Mega (Uno used as ISP) on: January 12, 2014, 05:33:02 pm
Quote
But, if I then disconnect the programmer Arduino from the target Uno and try to upload e.g. a blink sketch (via the normal IDE, using serial conn.) I get the "mismatch at byte..." result.

I'm not understanding this part. The TFTP bootloader won't work with serial comms, will it? Or does it? I don't know enough about that bootloader to say.
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