Introduction - If you have any usage issues, please Google them yourself
STM32_KEIL_ Input Capture+ PWM output+ MPU6050+ Kalman filter (library functions)
PB6 ~ PB9 (TIMER4) received four channels on the remote control receiver.
PA0 ~ PA3 (TIMER2) received four brushless ESCs.
PB10 ~ PB11 (IIC2) pick MPU6050.