- SPI-compatible, easy to drive.
- Onboard high precision RTC chip DS3231, with backup battery holder.
- Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series.
- Operating voltage: 5V
- Working current: 30mA
- Digits: 4
- Display size: 0.4inch
- LED color: red
- Driver: 74HC595
- Display part No.: FJ4401AH
- Dimensions: 21（H）x 52.00（V） mm
Digital tube and controller
74HC595 is a high-speed CMOS 8-bit 3-state shift register/output latch chip, using CMOS silicon gate technology. The device contains an 8-bit serial input and parallel output shift register and provides an 8-bit D-type storage register with an 8-bit 3-state output. Provide independent clock signals to the shift register and storage register. The shift register has a direct clearing function, serial input and output functions, and cascade applications. (Using standard pins.) Both shift registers and storage registers use a positive Edge clock trigger, if these two clocks are connected together, the shift register is always the previous clock pulse of the storage register. All input ports are equipped with anti-static and instant overvoltage protection circuits.
LED color: red
Circuit connection type: Negative
Display size: 0.4inch
Pico Quick Start
- MicroPython Firmware Download
- C_Blink Firmware Download
Please take care of the direction when you connect Pico, an USB port is printed to indicate . You can also check the pin of Pico and the LCD board when connecting.
You can connect display according to the table.
|DIN||GP11||Serial data input|
|CLK||GP10||Data input clock pin|
|RCLK||GP9||Output latch register clock pin|
Please refer to Raspberry Pi's guide: https://www.raspberrypi.org/documentation/pico/getting-started/
1. Open a terminal of Raspberry Pi
sudo apt-get install p7zip-full cd ~ sudo wget https://www.waveshare.com/w/upload/2/28/Pico_code.7z 7z x Pico-8SEG-LED-Code.7z -o./Pico-8SEG-LED-Code cd ~/Pico-8SEG-LED-Code cd c/build/
- Open a terminal and got to the C directory
- Create build folder and add path of SDK to it, it is ../../pico-sdk by default, however, it may be different for different users, please check the actual path of your pico.
cd build export PICO_SDK_PATH=../../pico-sdk
- run cmake to generate Makefile, and build it.
cmake .. make -j9
- A main.uf2 file is generated.
- Hold the BOOTSEL button of Pico, and connect the USB interface of Pico to Raspberry Pi then release the button.
- Copy the main.uf2 file to the RPi-RPI2 drive recognized.
Use in Windows
- 1. Press and hold the BOOTSET button on the Pico board, connect the pico to the USB port of the computer through the Micro USB cable, and release the button after the computer recognizes a removable hard disk (RPI-RP2).
- 2. Copy the rp2-pico-20210418-v1.15.uf2 file in the python directory to the recognized removable disk (RPI-RP2).
- 3. Open Thonny IDE (Note: Use the latest version of Thonny, otherwise there is no Pico support package, the latest version under Windows is v3.3.3).
- 4. Click Tools->Settings->Interpreter, select Pico and the corresponding port as shown in the figure.
- 5. File -> Open -> the corresponding .py file, click to run, as shown in the following figure:
Run in Raspberry Pi
- Hold the BOOTSET key of the Pico board, then connect the Pico to Raspberry Pi by USB cable, then release the key.
- Once the removable disk (RPI-RPI2) is recognized, copy the rp2-pico-20210418-v1.15.uf2 file to pico.
- Open the Thonny IDE in Raspberry Pi, update it if it doesn't support Pico.
- Configure the port by choosing MicroPython(Raspberry Pi and ttyACM0 port) in Tools -> Options... -> Interpreter.
sudo apt upgrade thonny
- Choose File->Open...->python/ and select the corresponding .py file to run the codes
In DEV_Config.c(.h) file (...\c\lib\Config)
- Data type：
#define UBYTE uint8_t #define UWORD uint16_t #define UDOUBLE uint32_t
- Mpdule initializes and exit:
void DEV_Module_Init(void); void DEV_Module_Exit(void); Note： 1. These are functions that are used to handle GPIO:
- GPIO Write/read：
void DEV_Digital_Write(UWORD Pin, UBYTE Value); UBYTE DEV_Digital_Read(UWORD Pin);
- SPI write byte
void DEV_SPI_WriteByte(UBYTE Value);
If you require technical support, please go to the Support page and open a ticket.