Project based on CW32 voltage and current meter

I. Project Introduction
This project replicates a voltage and current meter based on the CW32 Diwenxing development board, realizing simple voltage and current measurement functions.
The functions implemented in this project are:
1. Voltage measurement (0-30V)
2. Current measurement (0-1A)
3. Voltage calibration (3V)
4. Current calibration (0.5A)
II. Hardware
The main body is drawn with reference to the example diagram provided by LCSC EDA, with minor modifications. The modifications are as follows:
1. To reduce the overall size, most components are changed to surface mount.
2. A serial communication port is added to facilitate serial communication while powering on.
III. Software The
software mainly uses buttons to enter different measurement modes.
The main framework of the software is as follows:
Human-computer interaction mainly uses buttons, digital tubes, and LEDs. The software processing flow of the buttons is as follows:
III. Attachments
Demonstration video link
Project code: in the attachment