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  VS Arduino › Visual Micro › Microchip Studio (Atmel Studio 7) › Arduino DUE direct port I/O operations
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Normal Topic Arduino DUE direct port I/O operations (Read 4702 times)
Max Compana
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Arduino DUE direct port I/O operations
May 29th, 2015 at 1:27pm
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I have Atmel Studio and Visual Micro working perfectly together. 
Could anybody help me set up the system so that I can manipulate I/O ports directly?
When I'm trying to do something like that, I'm getting an error of the type "PORTD in not declared in this scope"

PORTD &= B11110111;

for(i=0;i<N;i++){
   PORTD |= B1000;
   PORTD &= B11110111;
}  

I just discovered that digitalWrite() instruction for Arduino takes 2.5 us. This is way too long for my application - I'm making a waveform generator, and resolution is very important. So this is the reason why I want to work with IO ports directly. 
Please advise. 
Thanks,
Alan
  
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Tim@Visual Micro
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Re: Arduino DUE direct port I/O operations
Reply #1 - May 29th, 2015 at 1:34pm
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Hi Max,

Normally you can ask these sorts of questions on the Arduino.cc forum because Visual Micro is compatible with the Arduino Ide. You will probably get better answers on arduino.cc Smiley

Which board are you using?

Thanks
  
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Max Compana
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Re: Arduino DUE direct port I/O operations
Reply #2 - May 29th, 2015 at 1:50pm
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I'm using Arduino DUE. It is ATSAM3X8E micro.
I think that it is somehow related to the libraries. This is why I decided to post my question here. Who would know better than Visual Micro how to set up the system?
  
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Tim@Visual Micro
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Re: Arduino DUE direct port I/O operations
Reply #3 - May 29th, 2015 at 1:55pm
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Actually I missed the subject which says DUE

I can't see how it relates to libraries as this is a part of the arduino core.

As I said the best place to look is arduino.cc

I found this at the top of google. It explains the DUE does not have a PORTD

http://forum.arduino.cc/index.php?topic=175617.0

Smiley

  
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