Introduction - If you have any usage issues, please Google them yourself
KEIL4.7 based software development to achieve PWM wave generated source code on STM32F103ZET6 microcontroller functions for defining two IO ports (can multiplex) to produce 50 -75 duty cycle PWM signal, two signals by four plus and minus keys be changed to realize the DC or stepper motor speed control, the oscilloscope waveform is stable, while the motor reversing control can be achieved