Hi Guys
I am trying to use ESP32 driving 6" ST7701S Display.
This is the connection of ESP32 and Display
This is my testing code
/*******************************************************************************
* LVGL Hello World
* This is a simple example for LVGL - Light and Versatile Graphics Library
* import from: https://github.com/lvgl/lv_demos.git
*
* Dependent libraries:
* LVGL: https://github.com/lvgl/lvgl.git
*
* LVGL Configuration file:
* Copy your_arduino_path/libraries/lvgl/lv_conf_template.h
* to your_arduino_path/libraries/lv_conf.h
*
* In lv_conf.h around line 15, enable config file:
* #if 1 // Set it to "1" to enable content
*
* Then find and set:
* #define LV_COLOR_DEPTH 16
* #define LV_TICK_CUSTOM 1
*
* For SPI/parallel 8 display set color swap can be faster, parallel 16/RGB screen don't swap!
* #define LV_COLOR_16_SWAP 1 // for SPI and parallel 8
* #define LV_COLOR_16_SWAP 0 // for parallel 16 and RGB
******************************************************************************/
#include <lvgl.h>
/*******************************************************************************
* Start of Arduino_GFX setting
*
* Arduino_GFX try to find the settings depends on selected board in Arduino IDE
* Or you can define the display dev kit not in the board list
* Defalult pin list for non display dev kit:
* Arduino Nano, Micro and more: CS: 9, DC: 8, RST: 7, BL: 6, SCK: 13, MOSI: 11, MISO: 12
* ESP32 various dev board : CS: 5, DC: 27, RST: 33, BL: 22, SCK: 18, MOSI: 23, MISO: nil
* ESP32-C3 various dev board : CS: 7, DC: 2, RST: 1, BL: 3, SCK: 4, MOSI: 6, MISO: nil
* ESP32-S2 various dev board : CS: 34, DC: 38, RST: 33, BL: 21, SCK: 36, MOSI: 35, MISO: nil
* ESP32-S3 various dev board : CS: 40, DC: 41, RST: 42, BL: 48, SCK: 36, MOSI: 35, MISO: nil
* ESP8266 various dev board : CS: 15, DC: 4, RST: 2, BL: 5, SCK: 14, MOSI: 13, MISO: 12
* Raspberry Pi Pico dev board : CS: 17, DC: 27, RST: 26, BL: 28, SCK: 18, MOSI: 19, MISO: 16
* RTL8720 BW16 old patch core : CS: 18, DC: 17, RST: 2, BL: 23, SCK: 19, MOSI: 21, MISO: 20
* RTL8720_BW16 Official core : CS: 9, DC: 8, RST: 6, BL: 3, SCK: 10, MOSI: 12, MISO: 11
* RTL8722 dev board : CS: 18, DC: 17, RST: 22, BL: 23, SCK: 13, MOSI: 11, MISO: 12
* RTL8722_mini dev board : CS: 12, DC: 14, RST: 15, BL: 13, SCK: 11, MOSI: 9, MISO: 10
* Seeeduino XIAO dev board : CS: 3, DC: 2, RST: 1, BL: 0, SCK: 8, MOSI: 10, MISO: 9
* Teensy 4.1 dev board : CS: 39, DC: 41, RST: 40, BL: 22, SCK: 13, MOSI: 11, MISO: 12
******************************************************************************/
#include <Arduino_GFX_Library.h>
#define GFX_BL DF_GFX_BL // default backlight pin, you may replace DF_GFX_BL to actual backlight pin
/* More dev device declaration: https://github.com/moononournation/Arduino_GFX/wiki/Dev-Device-Declaration */
#if defined(DISPLAY_DEV_KIT)
Arduino_GFX *gfx = create_default_Arduino_GFX();
#else /* !defined(DISPLAY_DEV_KIT) */
/* More data bus class: https://github.com/moononournation/Arduino_GFX/wiki/Data-Bus-Class */
Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(
21 /* CS */, 20 /* SCK */, 19 /* SDA */,
48 /* DE */, 45/* VSYNC */, 0 /* HSYNC */, 47 /* PCLK */,
3 /* R0 */, 46 /* R1 */, 9 /* R2 */, 10 /* R3 */, 11 /* R4 */,
40 /* G0/P22 */, 41 /* G1/P23 */, 42 /* G2/P24 */, 2 /* G3/P25 */, 1 /* G4/P26 */, 8 /* G5 */,
35 /* B0 */, 36 /* B1 */, 37 /* B2 */, 38 /* B3 */, 39 /* B4 */
);
/* More display class: https://github.com/moononournation/Arduino_GFX/wiki/Display-Class */
Arduino_ST7701_RGBPanel *gfx = new Arduino_ST7701_RGBPanel(
bus, GFX_NOT_DEFINED /* RST */, 0 /* rotation */,
false /* IPS */, 480 /* width */, 960 /* height */,
st7701_type5_init_operations, sizeof(st7701_type5_init_operations),
true /* BGR */,
10 /* hsync_front_porch */, 8 /* hsync_pulse_width */, 50 /* hsync_back_porch */,
10 /* vsync_front_porch */, 8 /* vsync_pulse_width */, 20 /* vsync_back_porch */);
#endif /* !defined(DISPLAY_DEV_KIT) */
/*******************************************************************************
* End of Arduino_GFX setting
******************************************************************************/
/* Change to your screen resolution */
static uint32_t screenWidth;
static uint32_t screenHeight;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t *disp_draw_buf;
static lv_disp_drv_t disp_drv;
/* Display flushing */
void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
uint32_t w = (area->x2 - area->x1 + 1);
uint32_t h = (area->y2 - area->y1 + 1);
#if (LV_COLOR_16_SWAP != 0)
gfx->draw16bitBeRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
#else
gfx->draw16bitRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
#endif
lv_disp_flush_ready(disp);
}
void setup()
{
Serial.begin(115200);
// Serial.setDebugOutput(true);
// while(!Serial);
Serial.println("Arduino_GFX LVGL Hello World example");
// Init Display
gfx->begin();
gfx->fillScreen(BLACK);
#ifdef GFX_BL
pinMode(GFX_BL, OUTPUT);
digitalWrite(GFX_BL, HIGH);
#endif
lv_init();
screenWidth = gfx->width();
screenHeight = gfx->height();
#ifdef ESP32
disp_draw_buf = (lv_color_t *)heap_caps_malloc(sizeof(lv_color_t) * screenWidth * 10, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
#else
disp_draw_buf = (lv_color_t *)malloc(sizeof(lv_color_t) * screenWidth * 10);
#endif
if (!disp_draw_buf)
{
Serial.println("LVGL disp_draw_buf allocate failed!");
}
else
{
lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, NULL, screenWidth * 10);
/* Initialize the display */
lv_disp_drv_init(&disp_drv);
/* Change the following line to your display resolution */
disp_drv.hor_res = screenWidth;
disp_drv.ver_res = screenHeight;
disp_drv.flush_cb = my_disp_flush;
disp_drv.draw_buf = &draw_buf;
lv_disp_drv_register(&disp_drv);
/* Initialize the (dummy) input device driver */
static lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv);
indev_drv.type = LV_INDEV_TYPE_POINTER;
lv_indev_drv_register(&indev_drv);
/* Create simple label */
lv_obj_t *label = lv_label_create(lv_scr_act());
//lv_label_set_text(label, "Hello Arduino! (V" GFX_STR(LVGL_VERSION_MAJOR) "." GFX_STR(LVGL_VERSION_MINOR) "." GFX_STR(LVGL_VERSION_PATCH) ")");
lv_label_set_text(label, "Hello Arduino!");
lv_obj_align(label, LV_ALIGN_CENTER, 0, 0);
Serial.println("Setup done");
}
}
void loop()
{
gfx->setCursor(random(gfx->width()), random(gfx->height()));
gfx->setTextColor(random(0xffff), random(0xffff));
gfx->setTextSize(random(6) /* x scale */, random(6) /* y scale */, random(2) /* pixel_margin */);
gfx->println("Hello World!");
delay(1000); // 1 second
lv_timer_handler(); /* let the GUI do its work */
delay(5);
}
The BackLight is on when power-up, but shows nothing, could anyone help me to find out the problem? Thanks
