Transpupino

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![image](https://user-images.githubusercontent.com/97788303/172349356-ab8f8d0a-e3b1-4fdc-a972-6f667a3e5836.png) You need add section OUTPUT PIN for VREF on Robin Mini V2.0. On this board A4988 without resistors for Vref, it generates with PWM by STM32.