This demo measures PWM parameters via two methods. Firstly, GPIO interrupt mode using edge-triggered ISRs calculate pulse intervals. Secondly, hardware capture mode using TIMG module auto-logs edge timestamps for period and duty computation. PWM signals generated from PB0 are routed to PA12 via jumper, with serial commands dynamically adjusting frequency and duty cycle using Set_Freq_Duty(). Real-time data validates hardware capture's advantages in high-frequency scenarios.