Half-steps in stepper library for 4-wire motors [imported]

[cmaglie]

This is Issue 139 moved from a Google Code project.
Added by 2009-11-05T07:28:01.000Z by john.zan...@gmail.com.
Please review that bug for more context and additional comments, but update this bug.

Original labels: Type-Enhancement, Priority-Medium

Original description

Using a half-step-library would double the precision of the stepper.

Attached you'll find my proposal for the changed Stepper library. I kept
the changes to a minimum.
It contains a new (added) constructor, a private boolean which indicates
whether or not to use the half-step system. The Stepper::step function was
changed to allow 2, 4, or 8 steps and the Stepper::stepMotor was changed
to send the 8 different signals to the 4 wires.

Users who created sketches using the previous lib can change to this new
library without compatibility problems.

[agdl]

This issue was moved to arduino-libraries/Stepper#2