LCSC GD32E230 Expansion Learning Board

This board
is an extension learning board for the LCSC GD32E230C8T6 development board. It integrates basic peripherals such as LED flashing lights, independent buttons, buzzer, digital tube, dot matrix, Bluetooth interface, screen interface, 2.4G interface, and all I/O are categorized and brought out, with 4 sets of IIC interfaces and dual power supply.
The board includes a physical image
and detailed specifications. It features dual
power
supply options: a Type-C 5V power supply or a DC 9-12V power supply. There are six LEDs for the
water lights , with the cathode connected to a 330Ω current-limiting resistor and then to GND. The positive terminals are connected to PA08, PA09, PA10, PA11, PA12, and PA15 . Four independent buttons are connected to A01, A02, A03, and A04, with the other end connected to 3.3V via a current-limiting resistor. The program uses a pull-up mode. The buzzer is driven by an 8550 NPN transistor, with C13 providing the signal. The signal can be observed through the LEDs on the core board. An 8-digit common cathode LED display (A01, A02, A03) is driven by a MAX7219, corresponding to DIN, CS, and CLK respectively. The dot matrix is ​​also driven by a MAX7219. These correspond to the DIN, CS, and CLK screen interfaces respectively. An 8-bit SPI interface can be used, or the first 4 bits can be used as an IIC interface for Bluetooth connection to the HC-05 Bluetooth module 2.4G. The 2.4G module interface connects to the 2.4G module IIC . There are 4 groups of IIC interfaces to meet your needs. The VCC voltage is selected under the jumper on the left side of the GPIO . All GPIO pins are represented by green, blue, and yellow, respectively, and are numbered below. Red pins connect to VCC, and black pins connect to GND. Usage Help: LED Experiment , Button Experiment, Buzzer Experiment, Serial Port Experiment, Screen Interface, Bluetooth Interface. Bug Fix Record 2024.04.24: Silkscreen Errors : GPIOA numbering was incorrectly written as 01~14, GPIOB numbering was incorrectly written as 01~15. This has been corrected, and the font size has been enlarged based on the sample.