[PD] Pduino output mode and I/O numbering differences

[Hans-Christoph Steiner]

On Sep 21, 2006, at 10:21 AM, David Merrill wrote:

> Georg Holzmann wrote:
>> Hallo!
>>
>>> I'm playing around with the latest arduino object for pd, and it  
>>> seems that there is a disconnect between the numbering for port I/ 
>>> O data-direction, and setting the value of a pin. I'm using the  
>>> arduino-test.pd patch, as well as the [pd DIGITAL-OUTPUT]  
>>> behavior pulled from the arduino help patch.
>> I don't really understand this - you mean you can set input/output  
>> mode for pin 13 with toggle 6 (and please try it in the help-patch) ?
> Hi Georg,
>
> What I'm confused about is that usually in microcontroller  
> programming, there is a symmetry between setting the data direction  
> of a pin (i.e. input or output), and setting/clearing a bit on that  
> pin. For instance, in AVR C, if I want to assert a HIGH voltage on  
> pin D0, I would write:
>
> DDRD = 0x01;    // set data direction for pin 0, port D to output
> PORTD |= 0x01; // set value of pin 0, port D to HIGH
>
> ..so the same value is used both to set the data direction and set  
> the bit on the pin. That's what I'm confused about the example  
> patch for arduino - where the same number does not get passed for  
> data direction as for pin setting (see my previous attached .jpg).  
> It's probably because I didn't dig into the example to see why this  
> mapping is different - but since arduino/pduino is supposed to be  
> good for physical computing students who know little about the  
> nitty-gritty details of hardware/software integration, it should be  
> as straightforward as possible.
>
> The patch in the .jpg that I sent is the arduino-test.pd, with the  
> "I/O the individual pins" section taken from arduino-help.pd. I'm  
> pretty sure I have the latest pduino firmware - I downloaded from  
> HCS's website directly yesterday.
> thanks,
> -David
>>
>>> p.s. also, clicking the "pulse all outputs" box in arduino- 
>>> test.pd crashes PD after a few seconds - I suspect due to a  
>>> comport problem..
>> Do you have the latest firmware and have you tried the PWN-OUT of  
>> the help patch?


This stuff is definitely under development ;).  I changed [bytemask]  
and [debytemask] to have the Most Significant Bit on the left most  
outlet rather than before, the Least Significant Bit.  I think that  
might be the cause of your problem.

You can download a newer test version of Pd-extended or download the  
files in question from cvs.  They are in externals/mapping

.hc

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