An error in stepgen related to index pulses has been resolved in this version. The error prevented the firmware from correctly setting the dir-pin. Recompilation of firmware is required. The correct working of the stepgen has been tested on a real machine, instead on synthesis. Many thanks LisovR for debugging this module.
Version 1.3.0 to 1.3.3 are now yanked <https://pypi.org/help/#yanked>_ because of not working stepgen module.