Modulation signal processing apparatus and method, and microcontroller unit and electronic device

A modulation signal processing device, which is applied to a microcontroller, and which comprises a first signal processing module and a second signal processing module, wherein:

• the first signal processing module is connected to an analog-to-digital converter of the microcontroller, and is configured to:
• receive a completion flag output by the analog-to-digital converter, collect a conversion value output by the analog-to-digital converter, and generate corresponding bit data based on a total number of sampling times and a preset half cycle value;
• and
• the second signal processing module is connected to a Pulse Width Modulation (PWM) output timer of the microcontroller, and is configured to:
• convert the bit data into modulation data packets that comply with the Qi protocol, and calculate a reload value of the PWM output timer and corresponding frequency modulation parameters respectively based on the modulation data packets and preset modulation configuration parameters, so that the PWM output timer outputs a corresponding pulse width modulation signal.