Wifi and Tone are not yet ported for the Due. Wifi Library is the next in my todo list for the coming week.

Sorry guys there are a lot of libraries out there... :-(

Sounds like cmaglie is the poor guy how is sitting chained in the basement how was told he can get out, but only if all work has been done.

Are you doing this alone cmaglie?

Let me count:

We have the official (IC10 near Atmel 16U2) in 2 versions (with crystal/no crystal)

The Old one (IC10 between headers)

and several other...

need pictures to say what is what

 

Well, I bought a board, that I expect to be complete.

Yes right, but if you look at all pictures from the Due on the Arduino pages, the Main or the Product Page, no picture shows an Board with an Crystal on it, so I think more and more the one with an Crystal an anormaly. And older pre Final boards are not relevant for the final release, its an another question why they decided to release them without the Crystal. How Boards without the final marks on the surface are getting to customers is an mystery from the mail-order. May it can solved...

Do we really need to calculate this??? on an product that is randomly shipped with or without crystal?, with or without headers?, with or without labelling on the board?

Wrong question its not the point if you get an board with or without an crystal, if you want an working crystal/RTC with the most possible accuraty you need the right capacitors. So the question is what is the right value. In the schematic the value are 22pF but the Spec says max is 20pF...

Thanks again.

I tried soldering on a watch crystal by itself and it is not enough - in fact it is worse, only 42 seconds per minute! With capacitors it runs at a more conventional 60 seconds per minute But there is no easy place to solder the capacitors on (I was literally holding them between the crystal and the shielding of the USB port, which can't have helped the accuracy much).

Capacitors are really really important for the Crystal to work proper, they needed that the main frequenz of the Crystal swing. On page 1407 of the full SAM3xa is an formel to choose the right value.

Thanks, that's useful to know. Could you have a close look under a magnifying glass and tell me if the capacitors next to the crystal are also missing? I'd probably be able to solder the crystal back on if I needed it, but the capacitors would be impossible.

I can,

From Arduino Store now Crystal no capacitors.

From eBay Crystal and capacitors.

Hey guys,

    I'm going to manufacture few pieces of Due PCB boards, but I'm really confusing about this above. The small chip 74LVC1G125DCK has been moved to left bottom corner. Seems that's the right position.

    The current EAGLE file released on Due production page matches the second one board in that picture. So it's not the latest one.

    Hope Arduino team release the latest one soon.

Best,
Tony

And the Story goes on,

I have buy just for fun an secound Due from ebay. And now there are the diff.



On the Due from ebay is everything the same, the box, the sticker and the package insert it looks in all way like the actuell one with all labels on the surface, except one part it has the Crystal for the RTC on the surface.

With this I have make an test I used stimmers Sketch for the http://arduino.cc/forum/index.php/topic,130125.msg980484.html#msg980484 RTC and put this in the void setup to use the external Crystal.

Code:

#define SUPC_KEY   0xA5u

void setup() {
  Serial.begin(9600);
  SUPC->SUPC_CR |= SUPC_CR_KEY(SUPC_KEY) | SUPC_CR_XTALSEL;
}

So there we are if I used the internal RC the RTC lost 5sec in 1 Min so it is nearly 10% to slow with the external Crystal is goes sync with my PC clock.

Everybody may, use and criticize.

Thanks - I don't like your hair! 

Strange my wife say's the same.

So I make an shot for the Temp-Sensor on the SAM

Code:

float trans = 3.3/4096;
float offset = 0.8;
float factor = 0.00256;
int fixtemp = 27;

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

void loop() {
  float treal = fixtemp + (( trans * temperatur() ) - offset ) / factor;
  Serial.println(treal);
  delay(10);
}

uint32_t temperatur() {
  uint32_t ulValue = 0;
  uint32_t ulChannel;
 
  // Enable the corresponding channel
  adc_enable_channel(ADC, ADC_TEMPERATURE_SENSOR);

  // Enable the temperature sensor
  adc_enable_ts(ADC);

  // Start the ADC
  adc_start(ADC);

  // Wait for end of conversion
  while ((adc_get_status(ADC) & ADC_ISR_DRDY) != ADC_ISR_DRDY);

  // Read the value
  ulValue = adc_get_latest_value(ADC);

  // Disable the corresponding channel
  adc_disable_channel(ADC, ADC_TEMPERATURE_SENSOR);

  return ulValue;
}

Everybody may, use and criticize.

Please share the modifications with us.

Can't what for that.

In some way both wrong,

No I said:-

The board has analogue inputs labeled A0 to A11 that's twelve inputs.

That is in no way incorrect.
The fact that the board has a few more analogue inputs dedicated to an other function was mentioned further back in the thread.

In fact you are wrong saying:-

there a 14 analog pins

There are in fact 15 analogue pins, the 16th input to the multiplexer is the internal temperature monitor.
But only 12 are supported in the software as used by the digitalRead(pin) function.

Yes Mike, you are right I'am wrong, my fault. I missed ADC14 on Pin52, and yes my wrong 12 supported by the corefiles from the IDE. Sorry.

but I can't see more than 10 analog inputs on the board.

.?
The board has analogue inputs labeled A0 to A11 that's twelve inputs.

In some way both wrong, there a 14 analog pins the last 2 are on TWI0 but they have Pull-ups

Maybe someone can tweak the firmware from the 16u2 to let the SRam used by the SAM.

The upload looks ok, and I don't think it has something to do with the RTC crytal.

Did you install the inf for the nativ Usb-Port and try to program it from this one too?

The question is why does it work on the most Windows Systems but not on all? What are the differences? There musst something that explains that.