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Topic: Is Arduino Due coming? (Read 29 times) previous topic - next topic

Graynomad

#40
Oct 04, 2012, 12:14 pm Last Edit: Oct 17, 2012, 05:16 pm by Graynomad Reason: 1
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SCL1 and SDA1 next to AREF

All new boards have the I2C signals over there I think.

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10-pin header where the 6-pin ICSP for 16U2 is on the Mega2560r3

That will be the JTAG header for the SAM.

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A12..A15 have changed to DA0, DA1, CAN RX0, CAN TX0.

CAN and the DAC (I guess), well they had to come out somewhere.

Also those pics have been around for a while, they must be of an earlier version as there is only a single USB jack, the current board has two.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

funkyguy4000

Does anybody know what the difference between the two jacks are?
Accelerate to 88 miles per hour.

Far-seeker


Does anybody know what the difference between the two jacks are?


The following is from the PDF Telecommando linked to...

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The Due hast two micro USB connectors one
intended for debugging purpose and a secondo one
capablo ef acting as a USB host, allowing externa USB
peripherals such as mouse, keyboards, smartphones,
etc. to be connected to the Arduino Due.


So they are probably completely separate as far as communication, and you can probably think of one as working similar to the USB port on the Uno and the other as more like a fully integrated USB host shield.

Massimo Banzi

@funkyguy4000

One USB port is connected directly to the processor and has an OTG connector, this means that it can be used as an USB host to connect devices like mouse, keyboard, android phones etc
The Second USB port is connected to the UART0 via the usual atmega16u2 we use on the other boards. this port is used for programming and communicating with the board. This allows you to develop projects using the USB host without having to plug and unplug cables all the time.

The board has a 4 pin SWD connector that can be used to debug code using a SWD/JTAG dongle. There is also a footprint for a 14pin jtag connector.

The pictures robotgrrl posted on the flickr account are of an old beta board we gave out in may to a number of beta testers and it didn't have the second USB port.

We upgraded the power supply to a DCDC converter that can provide enough current to the USB host so that now the Due can be used as an ADK2 development board

if you have other questions, shoot!

m

funkyguy4000

Just a couple layout questions.
1) The Due obviously looks very "mega-ish", does this mean that the pins will be laid out in a similar fashion?  Having the PWM pins over here, the communication over here, digital there, and analog over there?

2) If I'm not mistaken, the Due has been in development since the release of the new R3 layout, will the SDA and SCL lines be mapped to analog pins or will they be broken out like on the new R3 boards?
Accelerate to 88 miles per hour.

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