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1-Demo/Demo_Arduino/Libraries/Arduino_GFX-1.4.4/examples/LVGL/LvglHelloNeoPixel/Adafruit_NeoPixel_GFX.h

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+#ifndef _ADAFRUIT_NEOPIXEL_GFX_H_
+#define _ADAFRUIT_NEOPIXEL_GFX_H_
+
+#include <Adafruit_NeoPixel.h>
+#include <Arduino_GFX.h>
+
+#ifdef __AVR__
+#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
+#endif
+
+// Which pin on the Arduino is connected to the NeoPixels?
+#define NEOPIXEL_PIN 1 // On Trinket or Gemma, suggest changing this to 1
+
+#define NEOPIXEL_WIDTH 30
+#define NEOPIXEL_HEIGHT 8
+#define NUMPIXELS (NEOPIXEL_WIDTH * NEOPIXEL_HEIGHT)
+#define NEOPIXEL_BRIGHTNESS 3 // 1-255
+
+// Pixel type flags, add together as needed:
+// NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
+// NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
+// NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
+// NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
+// NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
+#define NEOPIXEL_TYPE (NEO_GRB + NEO_KHZ800)
+
+class Adafruit_NeoPixel_GFX : public Arduino_GFX
+{
+public:
+  Adafruit_NeoPixel_GFX() : Arduino_GFX(NEOPIXEL_WIDTH, NEOPIXEL_HEIGHT)
+  {
+    wrap = false;
+  }
+
+  bool begin(int32_t speed = GFX_NOT_DEFINED) override
+  {
+    // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
+    // Any other board, you can remove this part (but no harm leaving it):
+#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
+    clock_prescale_set(clock_div_1);
+#endif
+    // END of Trinket-specific code.
+    _pixels = new Adafruit_NeoPixel(NUMPIXELS, NEOPIXEL_PIN, NEOPIXEL_TYPE);
+    _pixels->begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
+    _pixels->show();  // Turn OFF all pixels ASAP
+    _pixels->setBrightness(NEOPIXEL_BRIGHTNESS);
+
+    return true;
+  }
+
+  void writePixelPreclipped(int16_t x, int16_t y, uint16_t color) override
+  {
+    // select you matrix mode
+    int32_t i = (x * NEOPIXEL_HEIGHT) + y;                                         // vertical strip start from left top
+    // int32_t i = (x * NEOPIXEL_HEIGHT) + ((x % 2) ? y : (NEOPIXEL_HEIGHT - y - 1)); // vertical zigzag strip start from left top
+    // int32_t i = (x * NEOPIXEL_HEIGHT) + (NEOPIXEL_HEIGHT - y - 1);                 // vertical strip start from left bottom
+    // int32_t i = (x * NEOPIXEL_HEIGHT) + ((x % 2) ? (NEOPIXEL_HEIGHT - y - 1) : y); // vertical zigzag strip start from left bottom
+    // int32_t i = x + (y * NEOPIXEL_WIDTH);                                          // horizontal strip start from left top
+    // int32_t i = ((y % 2) ? x : (NEOPIXEL_WIDTH - x - 1)) + (y * NEOPIXEL_WIDTH);   // horizontal zigzag strip start from left top
+    // int32_t i = (NEOPIXEL_WIDTH - x - 1) + (y * NEOPIXEL_WIDTH);                   // horizontal strip start from right top
+    // int32_t i = ((y % 2) ? (NEOPIXEL_WIDTH - x - 1) : x) + (y * NEOPIXEL_WIDTH);   // horizontal zigzag strip start from right top
+
+    _pixels->setPixelColor(i, RGB16TO24(color));
+  }
+
+  void endWrite(void) override
+  {
+    _pixels->show();
+  }
+
+  Adafruit_NeoPixel *_pixels;
+};
+
+#endif // _ADAFRUIT_NEOPIXEL_GFX_H_

1-Demo/Demo_Arduino/Libraries/Arduino_GFX-1.4.4/examples/LVGL/LvglHelloNeoPixel/LvglHelloNeoPixel.ino

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+/*******************************************************************************
+ * LVGL Hello NeoPixel demo
+ * This is a LVGL Hello World with NeoPixel matrix and Unicode text display
+ *
+ * Dependent libraries:
+ * LVGL: https://github.com/lvgl/lvgl.git
+ * Adafruit_NeoPixel: https://github.com/adafruit/Adafruit_NeoPixel.git
+ *
+ * Font:
+ * https://github.com/Warren2060/Chill-Bitmap.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
+ * #define LV_COLOR_16_SWAP   0
+ ******************************************************************************/
+#include <lvgl.h>
+#include <Arduino_GFX_Library.h>
+
+// all settings in header file
+#include "Adafruit_NeoPixel_GFX.h"
+Arduino_GFX *gfx = new Adafruit_NeoPixel_GFX();
+int16_t x;
+uint16_t w, tw;
+
+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);
+
+  gfx->draw16bitRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
+
+  lv_disp_flush_ready(disp);
+}
+
+void setup()
+{
+  Serial.begin(115200);
+  // Serial.setDebugOutput(true);
+  // while(!Serial);
+  Serial.println("Arduino_GFX LVGL Hello NeoPixel example");
+
+#ifdef GFX_EXTRA_PRE_INIT
+  GFX_EXTRA_PRE_INIT();
+#endif
+
+  // Init Display
+  if (!gfx->begin())
+  {
+    Serial.println("gfx->begin() failed!");
+  }
+  gfx->fillScreen(BLACK);
+
+#ifdef GFX_BL
+  pinMode(GFX_BL, OUTPUT);
+  digitalWrite(GFX_BL, HIGH);
+#endif
+
+  lv_init();
+
+#ifdef ESP32
+  disp_draw_buf = (lv_color_t *)heap_caps_malloc(sizeof(lv_color_t) * NEOPIXEL_WIDTH * NEOPIXEL_HEIGHT, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
+#else
+  disp_draw_buf = (lv_color_t *)malloc(sizeof(lv_color_t) * NEOPIXEL_WIDTH * NEOPIXEL_HEIGHT);
+#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, NEOPIXEL_WIDTH * NEOPIXEL_HEIGHT);
+
+    /* Initialize the display */
+    lv_disp_drv_init(&disp_drv);
+    /* Change the following line to your display resolution */
+    disp_drv.hor_res = NEOPIXEL_WIDTH;
+    disp_drv.ver_res = NEOPIXEL_HEIGHT;
+    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);
+
+    /* Set black background */
+    lv_obj_set_style_bg_color(lv_scr_act(), lv_color_hex(0x000000), LV_PART_MAIN | LV_STATE_DEFAULT);
+    /* Create label */
+    lv_obj_t *label = lv_label_create(lv_scr_act());
+    lv_obj_align(label, LV_ALIGN_CENTER, 0, 0);
+    lv_obj_set_width(label, NEOPIXEL_WIDTH);
+    lv_obj_set_style_text_color(label, lv_color_hex(0xFF0000), LV_PART_MAIN | LV_STATE_DEFAULT);
+    lv_label_set_text(label, "LVGL Hello NeoPixel! 《陈亮手痕定律》 点阵屏测试");
+    /* Set font */
+    LV_FONT_DECLARE(ui_font_Chill7);
+    lv_obj_set_style_text_font(label, &ui_font_Chill7, LV_PART_MAIN | LV_STATE_DEFAULT);
+    /* Set scrolling */
+    lv_label_set_long_mode(label, LV_LABEL_LONG_SCROLL_CIRCULAR);
+    lv_obj_set_style_anim_speed(label, 10, LV_STATE_DEFAULT);
+
+    Serial.println("Setup done");
+  }
+}
+
+void loop()
+{
+  lv_timer_handler(); /* let the GUI do its work */
+  delay(5);
+}