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1  Products / Arduino Due / Programming methods other than USB on: December 04, 2012, 08:12:32 pm
I've had great success with embedding Atmega 328s and 2560s, writing code with the Arduino IDE, and then programming over ICSP (with an AVR ISP MKII).

I'd like to be able to do this with the ARM in the Arduino Due, but I'm a bit ignorant as to how to proceed.

Is there a simple way to program an embedded SAM3X8E (from the Arduino IDE!) with JTAG or some other method that doesn't involve a second microcontroller with its own ISCP header (like on the Due board)?

- Ben
2  Forum 2005-2010 (read only) / Interfacing / Re: I2C (Wire) Datas in Request/receive  for  PCF8591 on: July 16, 2010, 07:22:42 pm
Solved!  I found some Arduino code that turns it into an I2C bus scanner.  It checks all the possible addresses and reports which ones are connected.

http://todbot.com/blog/2009/11/29/i2cscanner-pde-arduino-as-i2c-bus-scanner/

See here for the code I used to actually interface with the IMU:

neo-sat.org
3  Forum 2005-2010 (read only) / Interfacing / Re: I2C (Wire) Datas in Request/receive  for  PCF8591 on: July 16, 2010, 05:02:40 pm
Kozmic, did you ever get this figured out?  I'm also trying to interface with an I2C nIMU and am having terrible luck.
4  Forum 2005-2010 (read only) / Troubleshooting / Re: 5V Arduino Pro Mini running on 3.3 V? on: September 16, 2010, 02:05:16 am
Ok, that's interesting.

What worried me was that the 3.3V arduino pro runs an 8MHz clock instead of 16.  I'm assuming there's a design reason for that.

I may just keep dropping that down all while doing something to actually measure the arduino's performance.  it would be good to figure out exactly when it conks out.
5  Forum 2005-2010 (read only) / Troubleshooting / 5V Arduino Pro Mini running on 3.3 V? on: September 15, 2010, 09:30:33 pm
I have a 5V arduino pro mini and I'm trying to run on around 3.3-3.8 volts.  I was about to order a boost converter from Pololu (I can't use a 3.3 v arduino for my application), but I just decided to try running it straight off of the power supply for the hell of it.

Much to my surprise, the arduino powered up and appears to be working perfectly fine off of 3.3 volts.  Does anyone know what potential problems this could cause?  I'm assuming all of the digital outs will be at 3.3V and the analog ins will be miscalibrated, but are there any deeper, scarier issues I should worry about?

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