[PD] how to pd2stepper motor?

[Martin Peach]

Hans-Christoph Steiner wrote:
>
> Sounds like the [comport] probably didn't create properly.  If you 
> have a recent auto-build or the most recent test release, then you can 
> send a [info( message to [comport] and get a list of the available 
> serial ports and their corresponding numbers.  Then you would do 
> [comport 4] if /dev/ttyUSB0 is #4.
>
I changed [comport] a bit recently in CVS so that the [info( message 
outputs the current state of the comport, and a [devices( message gives 
the list of devices. This is because the operating system can take a few 
seconds to get the device list, which only needs to be loaded once, and 
interferes with real-time updates of the input pin status.
As far as steppers go it would be nice to have arduino commands for 
steppers. It looks like the existing pduino firmware code can only 
change one pin at a time, it would be nice to have a parallel digital 
pin command with a mask like set_digital_outs(int output_pattern, int 
mask) so the set bits in mask would be changed, at the same time, 
according to output_pattern and the zero bits would be unaffected.
Martin


> .hc
>
> On Oct 1, 2006, at 7:45 PM, ad wrote:
>
>> hi, tonite i've been trying to control a stepper motor via pd's 
>> firmata, formerly known as pduino.
>>
>> im using the arduino-test.pd patch included with in the Pduino-0.1 
>> release, me under linux (gentoo:)
>>
>> as soon as i choose the devicename port /dev/ttyUSB0 i get a full pd 
>> window with:
>>
>> error: inlet: expected '' but got 'float'
>> error: inlet: expected '' but got 'list'
>> error: inlet: expected '' but got 'float'
>> error: inlet: expected '' but got 'list'
>>
>> this doesn't happen when i open Gerda's and Georg Arduino-help.pd and 
>> since it doesn't crash the process i can continue to check I/O's, 
>> passing data from a potentiometer to pd via analog inputs on the 
>> arduino works like charm.
>>
>> but i got lost when trying to send control data to a step motor 
>> connected in this way:  
>> http://img.photobucket.com/albums/v20/igortme/Arduino/Ejemplos/ESQUEMA_MOTOR_PASO_A_PASO.jpg 
>>
>>
>> I wonder how should one send the messages to make the motor move in 
>> one direction or the other any precise amount of steps? has anyone 
>> done this (surely yes). could you tell me how will this pd2stepper 
>> sintax goes?
>>
>> thanks,
>> /alejo
>>
>>
>> p.s: im sending also to the newly opened arduino mailing list :P
>>
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