1.28-round-lcd-breakout

1.28" Round LCD Breakout

The 1.28" Round LCD Breakout is a 1.28-inch display breakout with 240 x 240 resolution, 65K RGB colours, and a clear and colourful displaying effect meant to help gadgets increase their interaction via SPI connection by providing a GPIO header for easy interface. The GC9A01 display driver and SPI interface are integrated into the 1.28" Round LCD Breakout, decreasing the number of IO pins required.

Features

• 4-wire SPI Communication
• GPIO header for easy interfacing
• Cross-Platform compatibility
• 1.28” Round LCD

Specifications

• Operating Voltage - 3.3 V
• Pixel Size - 0.135 × 0.135mm
• Board Dimension - 36mm x 44mm
• Pixels - 240×240 resolution
• Display Colour - 65K RGB
• Driver - GC9A01

Buy it From : Click Here

Pinout

Round LCD Breakout	Description
GND	Ground Supply
VCC	Power Supply 3.3V - 5V DC
DIN	Serial Data Input / Outout
CLK	Serial Clock
CS	Chip select input pin ("Low" enable)
DC	Display data / Command selection pin DC='1': Display data. DC='0': Command data
RST	Reset Pin. Initialize the chip with a low input
BL	Blacklight Control. High: Blacklight on Low: Blacklight off.

Installation

MicroPython

• For running this HAT, you require these components :
  • Raspberry Pi Pico X 1
  • Pico 1.28" Round LCD HAT X 1
  • USB Cable X 1

• Copy or clone code from Github.

https://github.com/sbcshop/1.28-Round-LCD-Breakout

• Stack Pico 1.28 Round LCD HAT with Raspberry Pi Pico, Make sure the USB symbol on LCD HAT should be on the same side as PICO USB.

• Press and hold BOOTSEL pin of Raspberry Pi Pico and connect the USB cable, it will create a drive as RPI-RP2.

• Now drag and drog/copy firmware.uf2 file from firmware folder to RPI-RP2 Drive. It will reboot your raspberry pi pico.

• Open Thonny IDE and Choose interpreter as MicroPython (Raspberry Pi pico).

• Now you can run example codes from the Pico_Example_mpy folder in Thonny Ide. For example, Open the hello.py file in thonny and click on the green play button to run this example.

It will print "Hello" on Round LCD. You can use the joystick to change the LCD color.

Working Example

• This module was tested on Raspberry Pi Pico. You need to provide a SPI object and the pin to use for the DC pin of the screen.

import machine
import gc9a01
spi = SPI(1, baudrate=40000000, sck=Pin(10), mosi=Pin(11))
tft = gc9a01.GC9A01(spi, 240, 240, reset=Pin(12, Pin.OUT), cs=Pin(9, Pin.OUT), dc=Pin(8, Pin.OUT), backlight=Pin(13, Pin.OUT), rotation=0)
tft.init()

Functions and Arguments

• gc9a01.GC9A01(spi, width, height, reset, dc, cs, backlight, rotation, buffer_size)

required arguments:

`spi` spi device
  `width` display width
  `height` display height

optional args:

`reset` reset pin
  `dc` dc pin
  `cs` cs pin
  `backlight` backlight pin
  `rotation` Orientation of display.
  `buffer_size` 0= buffer dynamically allocated and freed as needed.

  Rotation | Orientation
  -------- | --------------------
     0     | 0 degrees
     1     | 90 degrees
     2     | 180 degrees
     3     | 270 degrees
     4     | 0 degrees mirrored
     5     | 90 degrees mirrored
     6     | 180 degrees mirrored
     7     | 270 degrees mirrored

If buffer_size is specified it must be large enough to contain the largest bitmap, font character, and/or JPG used (Rows * Columns *2 bytes). Specifying a buffer_size reserves memory for use by the driver otherwise, memory required is allocated and free dynamically as it is needed. Dynamic allocation can cause heap fragmentation so garbage collection (GC) should be enabled.

This driver supports only 16bit colors in RGB565 notation.

• GC9A01.on()

Turn on the backlight pin if one was defined during init.

• GC9A01.off()

Turn off the backlight pin if one was defined during init.

• GC9A01.pixel(x, y, color)

Set the specified pixel to the given color.

• GC9A01.line(x0, y0, x1, y1, color)

Draws a single line with the provided color from (x0, y0) to (x1, y1).

• GC9A01.hline(x, y, length, color)

Draws a single horizontal line with the provided color and length in pixels. Along with vline, this is a fast version with reduced number of SPI calls.

• GC9A01.vline(x, y, length, color)

Draws a single horizontal line with the provided color and length in pixels.

• GC9A01.rect(x, y, width, height, color)

Draws a rectangle from (x, y) with corresponding dimensions

• GC9A01.fill_rect(x, y, width, height, color)

Fill a rectangle starting from (x, y) coordinates

Source code credit: https://github.com/russhughes/gc9a01_mpy

Resources

Github

• Source Code