LovyanGFX Settings for 7" Display

benlye

I've recently bought a few Elecrow ESP32 Displays. I've been getting them to work with various Arduino graphics libraries and have found several working configurations.

I was unable to get the 7" screen to work properly with recent versions of Arduino_GFX, but this configuration works for me with the 7" display using the latest LovyanGFX library:

class LGFX : public lgfx::LGFX_Device
{
public:
    lgfx::Bus_RGB _bus_instance;
    lgfx::Panel_RGB _panel_instance;
    lgfx::Light_PWM _light_instance;
    lgfx::Touch_GT911 _touch_instance;
    LGFX(void)
    {
        {
            auto cfg = _panel_instance.config();
            cfg.memory_width = 800;
            cfg.memory_height = 480;
            cfg.panel_width = 800;
            cfg.panel_height = 480;
            cfg.offset_x = 0;
            cfg.offset_y = 0;
            _panel_instance.config(cfg);
        }


        {
            auto cfg = _bus_instance.config();
            cfg.panel = &_panel_instance;


            cfg.pin_d0 = GPIO_NUM_15; // B0
            cfg.pin_d1 = GPIO_NUM_7;  // B1
            cfg.pin_d2 = GPIO_NUM_6;  // B2
            cfg.pin_d3 = GPIO_NUM_5;  // B3
            cfg.pin_d4 = GPIO_NUM_4;  // B4


            cfg.pin_d5 = GPIO_NUM_9;  // G0
            cfg.pin_d6 = GPIO_NUM_46; // G1
            cfg.pin_d7 = GPIO_NUM_3;  // G2
            cfg.pin_d8 = GPIO_NUM_8;  // G3
            cfg.pin_d9 = GPIO_NUM_16; // G4
            cfg.pin_d10 = GPIO_NUM_1; // G5


            cfg.pin_d11 = GPIO_NUM_14; // R0
            cfg.pin_d12 = GPIO_NUM_21; // R1
            cfg.pin_d13 = GPIO_NUM_47; // R2
            cfg.pin_d14 = GPIO_NUM_48; // R3
            cfg.pin_d15 = GPIO_NUM_45; // R4


            cfg.pin_henable = GPIO_NUM_41;
            cfg.pin_vsync = GPIO_NUM_40;
            cfg.pin_hsync = GPIO_NUM_39;
            cfg.pin_pclk = GPIO_NUM_0;
            cfg.freq_write = 12000000;


            cfg.hsync_polarity = 0;
            cfg.hsync_front_porch = 40;
            cfg.hsync_pulse_width = 48;
            cfg.hsync_back_porch = 40;


            cfg.vsync_polarity = 0;
            cfg.vsync_front_porch = 1;
            cfg.vsync_pulse_width = 31;
            cfg.vsync_back_porch = 13;


            cfg.pclk_active_neg = 1;
            cfg.de_idle_high = 0;
            cfg.pclk_idle_high = 0;


            _bus_instance.config(cfg);
        }
        _panel_instance.setBus(&_bus_instance);


        {
            auto cfg = _light_instance.config();
            cfg.pin_bl = GPIO_NUM_2;
            _light_instance.config(cfg);
        }
        _panel_instance.light(&_light_instance);


        {
            auto cfg = _touch_instance.config();
            cfg.x_min      = 0;
            cfg.x_max      = 799;
            cfg.y_min      = 0;
            cfg.y_max      = 479;
            cfg.pin_int    = -1;
            cfg.pin_rst    = -1;
            cfg.bus_shared = false;
            cfg.offset_rotation = 0;
            cfg.i2c_port   = I2C_NUM_1;
            cfg.pin_sda    = GPIO_NUM_19;
            cfg.pin_scl    = GPIO_NUM_20;
            cfg.freq       = 400000;
            cfg.i2c_addr   = 0x14;
            _touch_instance.config(cfg);
            _panel_instance.setTouch(&_touch_instance);
        }
        setPanel(&_panel_instance);
    }
};

jp320

Hi,

I have tried many combinations, and could not make only one example working with displays.

• Ide Arduino 2.2.1, ESP32 espressif 2.03 :

lvgl factory example for 7" : sha256 failed comparison.

GfX library for arduino : Hello example : black screen

LovyanGFX : black screen

U8g2 : which screen to select ?

• Ide Arduino 1.8.19 only espressif 2.10 or 2.11 for esp 32. --> black screen.

Could you give a working example, with the version used (ide arduino, ESP32 espressif...) ?

Thanks for sharing your experience.

Cordially

admin

https://forum.elecrow.com/discussion/comment/576#Comment_576

Hi, please try the v2.0.3 of esp32 package.