STM32 Development Board - Expansion Board

 Background of Developing an Automotive Communication Learning Expansion Board Based on the Skystar Expansion Board
: Due to the urgent need for learning automotive electronics-related knowledge, a main control board for testing automotive components needs to be developed to meet the testing and learning requirements of automotive electronic products.
Objective: To develop an automotive communication learning expansion board based on the Skystar expansion board, integrating multiple functions such as dual-channel CAN communication, UART serial communication, ADC analog signal reading, button control, and wireless network communication .
Schematic Diagram Explanation:
1. Dual-channel CAN Communication: Integrates two channels, communication CAN and diagnostic CAN, using two domestic SIT1042 chips to read data and fault information of automotive components.
2. UART Serial Communication: The UART serial communication interface directly uses the core board interface for data transmission with the host computer.
3. ADC Analog Signal Reading: Uses two 10k adjustable resistors to simulate data from two sensors, facilitating circuit debugging and testing.
4. Button Control: Equipped with three buttons, allowing control of the test status or the host computer software, achieving human-machine interaction and improving operational efficiency.
5. Wireless Network Communication: Integrated wireless network functionality supports data transmission to the host computer, enabling remote monitoring and control. It uses an ESP8266 module connected to the core board via a serial port.
6. Display Screen and LED Indicators: Equipped with a 1.8-inch TFT display screen for setting test parameters and displaying test results. Integrated LED indicators show the test and communication status for quick and easy understanding of the operating status.
Verification Results:
Functionality and circuitry are working normally!