README

PHP Package for the GC9A01 240x240 round full-color TFT display.

Compatible SPI Interfaces

The GC9A01 display communicates with your device over SPI, the Serial Peripheral Interface.

You can interface with displays such as the GC9A01 with this package the following ways:

A Linux Single-Board Computer's exposed GPIO pins using the dedicated SPI MOSI/SCK and CS pins as well as 2 GPIO pins for DC and RST.
An MPSSE-enabled USB-to-Serial device such as an FT232H generally using D0 and SCK, D1 for MOSI, D2 for MISO and D3 for CS, D4 and D5 for RST/DC and connected to nearly any Linux or MacOS USB port.

Dependencies

This package makes use of modules within:

The ScrapyardIO Framework

This package also requires one of the following extensions in order to interface with SPI

In addition, an extension wrapper package is needed

For ext-posi

For ext-ftdi

Installing from Composer

Inside the root of your PHP Project, simply require the GC9A01 package from composer

composer require dept-of-scrapyard-robotics/gc9a01

Framework Configuration

If you would like to use the ScrapyardIO Framework to bootstrap your display without wasting lines configuring your display right in the script you can add your desired configuration to scrapyard-io.php, such as in this example:

SPI

use DeptOfScrapyardRobotics\Displays\GC9A01\GC9A01\GC9A01;

return [
    'displays' => [
        // For Native Configurations 
        'gc9a01-native' => [
            'class_name' => GC9A01::class,
            'connection' => ['driver' => 'native'],
            'startup' => [
                'spi' => [0, 0],
                'gpiochip' => [0],
                'rst' => [24],
                'dc' => [22],
            ],
        ],
        // For USB Configurations
        'gc9a01-usb' => [
            'class_name' => GC9A01::class,
            'connection' => ['driver' => 'usb'],
            'startup' => [
                'spi' => ['ft232h', 0],
                'gpiochip' => ['ft232h'],
                'rst' => [0],
                'dc' => [1],
            ],
        ],        
    ]
];

Basic Usage

Native (POSIX) SPI driver. (Single Board Computers)

use DeptOfScrapyardRobotics\Displays\GC9A01\GC9A01\GC9A01;

$native_spi_display = GC9A01::connection('native')
    ->spi(0, 0)
    ->gpiochip(0)
    ->rst(24)
    ->dc(22)
    ->create()

USB (MPSSE) driver using SPI. (Linux and MacOS)

use DeptOfScrapyardRobotics\Displays\GC9A01\GC9A01\GC9A01;

$usb_spi_display = GC9A01::connection('usb')
    ->spi('ft232h', 0)
    ->gpiochip('ft232h')
    ->rst(0)
    ->dc(1)
    ->create()

Alternative Usage

Using Through the Display Library (as a ColorTFTDisplay)

use DeptOfScrapyardRobotics\Displays\GC9A01\GC9A01\GC9A01;
use RealityInterface\Displays\Applied\FullColorTFT\ColorTFTDisplay;

$gc9a01 = GC9A01::connection('usb')
    ->spi('ft232h', 0)
    ->gpiochip('ft232h')
    ->rst(0)
    ->dc(1)
    ->create()
    
$display = ColorTFTDisplay::as($gc9a01);

Using Through the Display Framework (with an autoloaded config) (as a ColorTFTDisplay)

use RealityInterface\Displays\Applied\FullColorTFT\ColorTFTDisplay;

$display = ColorTFTDisplay::using('gc9a01-usb');

Display API

The setters in this API interface with the device directly (register writes), so you can use property access while still working against the panel itself.

Readable Properties (Getters)

There are no readable magic properties exposed for the GC9A01 in this package.

Writable Properties (Setters)

$display->display_on = true; Turns the panel on or off.
$display->sleep_mode_enabled = false; Enters or exits sleep mode.
$display->mad_control = new GC9A01MADControl(...); Sets memory access control (orientation / RGB-BGR / mirroring).
$display->pixel_format = GC9A01ColorMode::COLOR16; Sets the pixel format (color depth).
$display->display_function_control = new GC9A01DisplayFunctionControl(...); Sets the display function control register.
$display->power_control2 = new GC9A01PowerControl2(...); Sets power control register 2.
$display->power_control3 = new GC9A01PowerControl3(...); Sets power control register 3.
$display->power_control4 = new GC9A01PowerControl4(...); Sets power control register 4.
$display->frame_rate = new GC9A01FrameRate(...); Sets the frame rate.
$display->display_inversion_enabled = false; Enables or disables display color inversion.
$display->tearing_effect_enabled = false; Enables or disables the tearing-effect output line.
$display->color_gamma1 = new GC9A01Gamma1(...); Sets gamma curve 1.
$display->color_gamma2 = new GC9A01Gamma2(...); Sets gamma curve 2.
$display->color_gamma3 = new GC9A01Gamma3(...); Sets gamma curve 3.
$display->color_gamma4 = new GC9A01Gamma4(...); Sets gamma curve 4.
$display->normal_mode_on = true; Returns the panel to normal display mode.

Drawing on the Display

Draw with a Screen, which wraps a GFXRenderer over a frame buffer matched to the panel's FormatSpec, then ships the bytes on render(). A colour TFT uses a DirtyRegionsBuffer (coalesces changed rectangles, one update per region). Colors are 16-bit RGB565 integers (e.g. 0xF800 red, 0x07E0 green, 0x001F blue).

The GC9A01 is a 240x240 round panel, so keep important content away from the corners.

use DeptOfScrapyardRobotics\Displays\GC9A01\GC9A01\GC9A01;
use Microscrap\GFX\PhpdaFruit\Buffers\DirtyRegionsBuffer;
use Microscrap\GFX\PhpdaFruit\GFXRenderer;
use RealityInterface\Displays\Applied\FullColorTFT\ColorTFTDisplay;
use RealityInterface\Displays\Screen;

$gc9a01 = GC9A01::connection('usb')
    ->spi('ft232h', 0)
    ->gpiochip('ft232h')
    ->rst(0)
    ->dc(1)
    ->create();

$display = ColorTFTDisplay::as($gc9a01);

$buffer = new DirtyRegionsBuffer($display->width(), $display->height(), $display->getFormatSpec());
$screen = new Screen($display, new GFXRenderer($buffer));

$center = intdiv($display->width(), 2);

$screen
    ->fill(0x0000)
    ->drawCircle($center, $center, $center - 1, 0xFFFF)
    ->fillCircle($center, $center, 30, 0xF800)
    ->setTextColor(0x07E0)
    ->setTextSize(3)
    ->setCursor($center - 60, $center - 12)
    ->print('GC9A01')
    ->render();

dept-of-scrapyard-robotics/gc9a01

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