I agree that beginner tutorials are very useful. In the Wiki I tried to aim more for a IOIO user guide than a tutorial for how to build projects with the IOIO (since this would be a rabbit-hole). There are various resources (websites / book) that do have this kind of information, but by all means there are a lot of missing ones too.
However, I'm always happy to help with concrete questions, so let's focus on yours. The driver you're using is a little unpleasant to use with the IOIO: the waveforms it expects are not very easy to generate with the current motor control library. The stepper functions in the library where specifically designed for common stepper controllers, which have a step/dir input. The Pololu ones you linked to are excellent examples, and those are what I would have used if I were you. There are many other options, all of which with essentially the same kind of input. The normally vary by the voltage / current ratings, micro-stepping and other minor features. On Wed, Apr 9, 2014 at 11:39 AM, Bhaskar <[email protected]> wrote: > Hi Ytai, > > I want to drive 4 units of 4-wire bipolar stepper motors (5V)(extracted > from floppy drive) and a single 12V bipolar stepper motor (Sanyo Denki # > 103-591-0155 4.3 Ohm, 0.9 Degrees/Step) using IOIO. I have controlled > these stepper motors using a L239D H-bridge driver and arduino board > (StepperLab3_sch.jpg) without any problem. > > However to control these using motor control library and ioio, I am not > clear if L239D H-bridge driver alone can be wired to ioio as similar to > arduino (Stepper motor_ioio.jpg), or does the motor control library outputs > only step and direction signal (from ioio pin) and needs another stepper > driver to drive them (stepper_configuration.bmp) similar to ( > http://www.pololu.com/product/2134 or http://www.pololu.com/product/1182)? > I haven't tried it of the fear to fry the ioio board. > > I couldn't find any example depicting the hardware connections and > respective android code utilizing motor control library for driving stepper > motor. It would be of great help for the beginners to have a ready > reference of hardware connections and control code for different stepper > motors (unipolar/bipolar) in addition to that for servo and DC motors. I > went through documentation available for motor control library ( > https://github.com/ytai/ioio/wiki/Motor-control), however felt that it > was bit confusing in absence of examples (wiring diagram+android code). I > know you are a very busy person and it would be be like an over expectation > of help to ask for it (you already have been too patient in answering > queries, for which you have been and still being admired on IOIO group). > However having an ready reference of working examples would invite less of > trivial question, as possibly is mine. I hope somebody on this group would > contribute in this direction, which would be a great help for all the > beginners like me. > > Thanks in advance.. > > -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
