gc9d01-library 0.1.1

A Python driver for the GC9D01 round LCD display on Raspberry Pi

GC9D01 Display Driver for Raspberry Pi

This project provides a Python driver for the GC9D01 round LCD display, designed to work with Raspberry Pi. It includes a library file (GC9D01.py) and a test script (displaytest.py) to demonstrate basic functionality.

Hardware Requirements

• Raspberry Pi (any model with GPIO pins)
• GC9D01 round LCD display
• Appropriate connections between the Raspberry Pi and the display

Software Requirements

• Python 3
• CircuitPython libraries (adafruit_blinka, adafruit_circuitpython_busdevice)

Installation

1. Clone this repository or download the gc9d01_library folder.

2. Install the required libraries:

   pip3 install adafruit-blinka adafruit-circuitpython-busdevice
   

Wiring

Connect your GC9D01 display to the Raspberry Pi as follows:

GC9D01 Pin	Raspberry Pi Pin	GPIO Number	Description
VCC	Pin 17	3.3V	Power
GND	Pin 20	GND	Ground
SCL	Pin 23	GPIO 11	SPI0 SCLK
SDA	Pin 19	GPIO 10	SPI0 MOSI
CS	Pin 24	GPIO 8	SPI0 CE0
DC	Pin 22	GPIO 25	Data/Command
RST	Pin 18	GPIO 24	Reset

Note:

• The pin numbers refer to the physical pin numbers on the Raspberry Pi GPIO header.
• You can change the pin assignments in the displaytest.py file if needed, but make sure to update your wiring accordingly.
• Ensure that your Raspberry Pi is powered off when connecting or disconnecting the display to avoid potential damage.

Usage

1. Import the GC9D01 module in your Python script:

   import gc9d01_library
   

   Alternatively, you can import the GC9D01 class directly:

   from gc9d01_library import GC9D01
   

2. Set up the SPI and control pins:

   import board
   import busio
   import digitalio
   
   spi = busio.SPI(clock=board.SCK, MOSI=board.MOSI)
   cs = digitalio.DigitalInOut(board.CE0)
   dc = digitalio.DigitalInOut(board.D25)
   rst = digitalio.DigitalInOut(board.D24)
   

3. Create a display object:

   display = gc9d01_library.GC9D01(spi, dc, cs, rst)
   

   Or, if you imported the class directly:

   display = GC9D01(spi, dc, cs, rst)
   

4. Use the display methods to draw on the screen:

   display.fill_screen(0xFFFF)  # Fill screen with white
   display.draw_pixel(80, 80, 0xF800)  # Draw a red pixel at (80, 80)
   

Running the Test Script

To run the provided test script:

1. Ensure your display is correctly connected to the Raspberry Pi.

2. Run the following command in the terminal:

   python3 displaytest.py
   

This will cycle through different colors on the display.

Available Methods

• fill_screen(color): Fill the entire screen with a single color
• draw_pixel(x, y, color): Draw a single pixel at the specified position
• display_image(image_data): Display a full-screen image

Colors are represented in 16-bit RGB565 format.

Package Structure

The library is structured as follows:

gc9d01_library/
    __init__.py
    GC9D01.py
    displaytest.py

The __init__.py file allows the library to be imported as a Python package.

Troubleshooting

• If the display doesn't work, double-check your wiring connections.
• Ensure that SPI is enabled on your Raspberry Pi (raspi-config > Interface Options > SPI).
• Check that you have the latest version of the required libraries installed.

Contributing

Feel free to contribute to this project by submitting issues or pull requests.

License

This project is open source and available under the MIT License.