STM32 minimum system board: based on STM32F411RC/ET6
There are 6 buttons on the board, and the IO port is basically led out. The ADC8/9 has a hardware protection circuit, a serial port (CH340 solution) and RGB LED, and supports 4-wire SWD downloading.
Supports 4-pin IIC interface OLED screen. The test uses the common SSD1306 0.97' OLED to display normally.
When designing, try to consider using Jialichuang SMT basic library, as SMT cost is lower.
The binary program file for testing is provided in the attachment. You can download it for testing after proofing and welding.
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