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1  Products / Arduino Due / JTAG on: November 06, 2012, 04:02:04 am
Has anyone a working Arduino DUE JTAG configuration and can recommend a JTAG adapter?
Please also tell your computers OS (Windows/Linux) and Development Environment (Eclipse, Arduino SDK,...)
2  Products / Arduino Due / why the atmega16u on the DUE on: November 06, 2012, 04:00:58 am
I was wondering why the Desinger has choosen to use a atmega16 in between the USB and the SAM. Whats its use? Does it toggle the erase flash pin to perform uploading? Would not it have been much better in speed and price to use the USB directly?
3  Using Arduino / Microcontrollers / Re: Due? on: October 04, 2012, 09:31:02 am
is it at least known which license model will be applied?
4  Using Arduino / Microcontrollers / Due? on: October 04, 2012, 02:58:37 am
Is there a preorder possibility for a Due somewhere?
Which distributor will get the first copies?
When will the sdk go public/Can I take a sneak?

 Bernhard Kubicek
5  Using Arduino / Interfacing w/ Software on the Computer / Re: arduino mega2560: max usb baud rate on: November 03, 2011, 12:31:28 pm
I was talking about _any_ host software, not the arduino host software. From what I gathered, its driver/OS dependent. On windows, the arduino mega 2560 seems to work at 250000 baud, while on linux 230400 seems to be the max not recjected by the driver, although the jitter and hence the error rate is very high. While 250000 should work much more reliable.

Honestly, if it's like that its a big mess, because then the reprap firmware I help developing cannot take advantage of full speed in any platform-compatible way.
6  Development / Suggestions for the Arduino Project / Re: Watchdog reset mega 2560 on: November 03, 2011, 04:49:18 am
7  Using Arduino / Interfacing w/ Software on the Computer / arduino mega2560: max usb baud rate on: November 03, 2011, 04:47:07 am
What is the maximum baud rate that the arduino mega2560 can communicate with a host software?
200kbaud and 250kbaud should work well according with the 16Mhz quartz.

I tired to figure it out by the intermediate atmega8 that does the ttl-rx-tx<>usb bridging, and did not find it.

very nice greetings,
8  Development / Suggestions for the Arduino Project / Watchdog reset mega 2560 on: June 24, 2011, 04:30:27 am
there seems to be a bug in the stk500 uploader of the arduino mega2560.
If one tries to reset the chip by using the watchdog, one sets the wathdog to timeout of x msec. After the reset, the watchdog is still active, due to unknown reason of the avr guys. But, the timeout is resetted to the mimum time of a few ms.
And this is too long for the bootloader, which then keeps resetting in a row.
It was fixed in some other bootloader:

If somebody could add this watchdog code to the the bootloader, that would be awesome.

9  Using Arduino / Project Guidance / Re: Hacking into PIN0 and PIN1 aka UART on: May 30, 2011, 11:17:07 am
I want to create a device for makerbots/repraps/ultimakers, that can interactively control them with or without host pc.
Because the firmware of the things is highly different, I need to hack in somewhere in between, to obtain maximum portability.
Ideally, Mything would be a usb slave for the PC, and a usb host for the 3d printer.
Mything might be an arduino, i don't know yet.
For buffering, I intend to use a sd card.

I would have expected that the RX pin would not float, because then the arduino might recieve random data?
10  Using Arduino / Project Guidance / Hacking into PIN0 and PIN1 aka UART on: May 30, 2011, 10:29:41 am
I am the proud owner of a 3d-printer named Ultimaker. It is controlled by a arudino mega 2560, and is controlled from the host PC via a virtual com port.
I want to  build a thing that goes in between Arduino <> Mything  <>USB<> PC. It  buffers and modifies the bi-directional communication .
Mything might be an arduino, or just some atmega. Mything is actually an interactive control panel for the 3d printer.

So now the question: Can I use Rx/Tx aka Pin0 Pin1 on the arduino mega to communicate to Mything? Sending to mything with arduino TX->mything RX should work, I think. But how about the arduino rx? Is the usb/ttl converter leaving it floating while there is no signal recieved from usb, so that I can splice mything TX into it?

greetings, and thank you,
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