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[Reply #30 on:]

I think a missing crystal is a huge difference. Especially for people who wanted to use the SAMs RTC.

Yes, well if they added the crystal I'd have to agree that it makes a difference, but they have removed it so there will not be any support for using it. Has someone actually gotten a board with the crystal? If then it's just a very small number of boards that has it.

(Don't get me wrong, I'd like the crystal too. But I'm sure they had their reasons for removing it.)

The RTC can be used just without the cystal you can choose in the register to use external or internal clock

Good to know.

Thanks, man.

[Reply #31 on:]

I think a missing crystal is a huge difference. Especially for people who wanted to use the SAMs RTC.

Yes, well if they added the crystal I'd have to agree that it makes a difference, but they have removed it so there will not be any support for using it. Has someone actually gotten a board with the crystal? If then it's just a very small number of boards that has it.

(Don't get me wrong, I'd like the crystal too. But I'm sure they had their reasons for removing it.)

The RTC can be used just without the cystal you can choose in the register to use external or internal clock

Good to know.

Thanks, man.

No problem.
http://www.atmel.com/Images/doc11057.pdf at Page 248

[Reply #32 on:]

I tried this but unfortunately it looks like the internal RC oscillator isn't nearly accurate enough. Mine is about 10% slow

Code:

void setup()
{
  Serial.begin(9600);
}

union urtc {
  struct {
    byte secs,mins,hrs,pad;
  } time;
  long dat;
} rtc;

byte BCD2bin(byte b){return (b&15)+((b>>4)*10);}

void loop()
{
  rtc.dat=RTC->RTC_TIMR;
 
  Serial.print("At the third stroke, it will be ");
  Serial.print(BCD2bin(rtc.time.hrs));
  Serial.print(":");
  Serial.print(BCD2bin(rtc.time.mins));
  Serial.print(":");
  Serial.print(BCD2bin(rtc.time.secs));
  Serial.println(" imprecisely.");
}
 

[Reply #33 on:]

My Due (bought  from arduino.cc store within minutes of the store being updated after the announcement) has IC10 between the headers, no JTAG header, and a missing RTC crystal. It arrived on Monday 29 Oct, but I just saw it today as I was away all week.

[Reply #34 on:]

I just received two Due's in today.  They were ordered from the Arduino Store the same day it was listed online.  They both look just like the "current one" in the first photo.

[Reply #35 on:]

So: after all this discussion, has there been any official response as to a) whether the the currently downloadable reference files are indeed for the final release version, and b), why it is being reported that there are (at least!) two board versions being sold in the first batches of the Due available to the public?

It would be useful for any board variants that are being sold to be identified (r1.0, r 1.1, r1.2, etc.) and differences documented to assist in bug tracking, etc.

[Reply #36 on:]

I just received two Due's in today.  They were ordered from the Arduino Store the same day it was listed online.  They both look just like the "current one" in the first photo.

What??, did you get yours with the jtag header presoldered?, the place for mine is filled with solder..
And your have marking around the atmega ICSP header, unlike mine, I took an picture of that part here:
http://arduino.cc/forum/index.php/topic,128464.msg992419.html#msg992419

It seems like yours also have an small chip to the left, under the atmega, that I don't have..

How come these differences?

[Reply #37 on:]

Reading this post    http://arduino.cc/forum/index.php/topic,129880.0.html   it seems that the model with IC10 beetwen headers is the last one .
The photo on the website is an older model.
Is it true?
and why there are different version of the board if is still sold out and we bought the same board at the same moment :S ?

It's strange if that is the last board, since it lacks the markings for orientation on the ICSP header next to the ATMega.

[Reply #38 on:]

has there been any official response as to a) whether the the currently downloadable reference files are indeed for the final release version, and b), why it is being reported that there are (at least!) two board versions being sold in the first batches of the Due available to the public?

a) No
b) No

You were perhaps expecting feedback from the Arduino team? While they have posted more times in the last couple of weeks than in the entire history of this forum they still pretty much ignore us.

I did see Massimo give a non-explanation on another similar thread I think, something about we haven't got around to uploading the right PCB file or similar. I rather cynically suggested that may to give them a head start on the clone makers, I can think of no other reason to delay a 2-minute job like uploading a file. Mind you I wouldn't blame them if that is the case, they must get sick of people profiting from their hard work at their expense.

______
Rob

[Reply #39 on:]

The file available on the website is the latest available design file for the Arduino Due.
As far as I know this is the file used to generate the production files.
I will investigate further and update the file if necessary.

Consider that the factory will apply some minor tweaks to our reference design before going to productions (usually with their own CAM software) therefore some minor differences are possible.

A possible answer for b) is that the factory normally has two stages of manufacturing, a first batch where many steps are still sort of "handmade" to make sure the process is smooth then they move on to large scale manufacturing where they might introduce some more tweaks (usually to make it easier for them to do automated testing, optimising the pick and place machine programming )


@graynomad
We're not ignoring anybody. you have to keep into account that we are bombarded by communications from all sided and it's not easy to be on top of everything realtime.

You seem fairly negative in most of your messages, is that anything we can do to cheer you up?

m

[Reply #40 on:]

Sorry Massimo, the older I get the grumpier and more cynical I get. Mostly I try to be helpful but I confess to being negative at times, especially with regard to documentation.

You guys are doing a great job and I can only imaging the stuff you have to deal with every day. I'll be more positive in future, honest

______
Rob

[Reply #41 on:]

Graynomad

thanks for the support!

Do criticise our work in a productive way, keep us on our toes

now back to the geeky stuff

m

[Reply #42 on:]

I just unpacked my Due Mine is the "old" version.

[Reply #43 on:]

The only thing I really could wish for now Massimo, is an decent pinout schema. I have been struggling the whole weekend to make SPI work, and finally found the one in the forums here, but it's not complete, so I mixed spi for SAM with spi on the doublerow output, and could not understand a thing..
All boards should have that, easily available on the productpage. The pinout list, is kinda ok, but I have no clue to where pin 74 (or what the number was) is.

And, Why do someone get boards with the ic between the headers (like me), and someone gets with the ic close to the power jack?, what is the old layout, and the new/current layout?
The reason I ask, is that on my board, I don't have the pins in the jtag solderen, the holes are filled with solder, and the icsp close to the 16u2 is not marked for orientation... so which way to put the plug?

[Reply #44 on:]

Put a multimeter on it &  buzz it out. Its not hard. ICSP only has 1 GND pin, its pin 6, opposite corner is pin 1.
Do similar with the JTAG header.  Read the schematic, buzz out for the VCC pin, go from there.