I need to drive three motors and was wondering if I could port the code to a larger/faster STM32. Now I am looking into the pro version but I was trying avoid buying three drivers and make my own board that can drive all three.
As for STM32 you’ll need 3 advanced control timers to generate 3-phase PWM for each motor. There’s no such STM32 MCU, AFAIK.
It’s bad idea to drive several motors with one board. To many wires, too much heat, interference, too many things to go wrong. It’s much better to put integrated driver on the back of each motor and drive them via CAN or comething like that.