STC32G12K128 Automatic Download and Debugging Tool

The problem requires
implementing an automatic download and debugging function for the STC32G12K128 microcontroller.
Analysis:
Downloading programs to the STC32G12K128 microcontroller requires a cold start. Therefore, automatic power-off and power-on functionality is needed before downloading to ensure automatic program downloading.

Overall Design Approach:
The microcontroller's power-off and power-on are controlled by a special signal generated during program download.
Schematic Design Description:
1. This design mainly consists of an STC32G12k128 microcontroller minimum system, a USB-to-serial chip CH340N, and peripheral circuitry. The main function is to use the RTS pin of the CH340N to control the microcontroller's power-off and power-on during downloading, thus achieving automatic downloading.
PCB Design Description
: 1. To facilitate routing, the main chip is rotated 45 degrees, eliminating the need for vias for signal lines. The two filter capacitors for the microcontroller should be close to the microcontroller. Four ground windows are reserved around the board for easy oscilloscope clamping.
Software Description
: 1. This development board focuses on automatic hardware download and debugging. The software can directly download official example programs for testing. In practice, the official "10-Serial Port 1 Interrupt Mode and Computer Transmit/Receive Test" program is used for serial communication testing.
Physical Demonstration:
1. As shown in the figure below, it can be connected to the computer via a micro-USB interface.
Precautions:
1. Pay attention to port selection for serial communication.
Demonstration Video:
1. As shown in the attachment.
Other Attachments:
1. As shown in the attachment.