Require to convert a pulse stream to an analogue value.
Stepper motor control signals consisting of two flags:
Step flag pulses to initiate one ( micro)step
direction flag instructs direction of movement.
Wish to recover cumulative number of steps as an analog voltage appropriately weighed by direction flag.
So for instance clockwise movement from a point increases the analogue voltage while the anticlockwise movement decreases the analogue voltage.
A sixteen bit DAC with a 16 bit parallel interface hanging off a 16 bit up down counter is ideal.
Analogue bandwidth say up to 64KHz
Any suggestions, hints comments, told You so etc welcome