Using more than a single X-NUCLEO-IHM06A1 evaluation board

Hello

I want to use 3 x STSPIN220 for controlling 3 x stepper motors (motorized lens: Zoom, Iris, Focus). Currently to test lens I want with X-NUCLEO-IHM06A1 evaluation boards (with NUCLEO-F401RE). In stm32_nucleo_expansion_boards_motor_control_selection_guide.pdf mentioned that up to 2 x X-NUCLEO-IHM06A1 are stackable.

It is not clear for me how I can do it and to control movement of at least 2 lens (of 3) separately? 

Thank you in advance

Alex

[Peter BENSCH]

The STSPIN220 has no option for selecting one of several of these devices. As you need the control and feedback signals for each driver, but these are permanently assigned to the X-NUCLEO-IHM06A1, even controlling two devices becomes difficult.

The easiest way seems to be not to stack the X-NUCLEO-IHM06A1 on top of each other, but to connect them separately to the controlling MCU via cable.

Regards
/Peter