Create index.md

Requesting a new PID number for a USB HID Game controller device.

Author: FPGA-Computer

1209/6050/index.md

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+---
+layout: pid
+title: STM8 Gyrostick
+owner: FPGA-Computer
+license: GPLv3 + CC BY 4.0
+site: https://hw-by-design.blogspot.com/2021/05/stm8-gyrostock.html
+source: https://github.com/FPGA-Computer/STM8-Gyrostick
+---
+USB HID game controller using a MPU6050 module. It is to supplement motion data for CEMUhook used in emulators.