M5Paper: LVGL Sample (with LGFX)

main.cpp

#define LGFX_AUTODETECT
#define LGFX_USE_V1
#include <lvgl.h>
#include <M5EPD.h>
#include <LovyanGFX.hpp>

static const uint16_t screenWidth  = 960;
static const uint16_t screenHeight = 540;

lv_disp_draw_buf_t draw_buf;
lv_color_t buf[screenWidth * 10];

LGFX gfx;

void my_disp_flush(lv_disp_drv_t* disp, const lv_area_t* area, lv_color_t* color_p) {
  const u_long w = area->x2 - area->x1 + 1;
  const u_long h = area->y2 - area->y1 + 1;

  gfx.startWrite();
  gfx.setAddrWindow(area->x1, area->y1, w, h);
  gfx.pushColors(static_cast<uint16_t *>(&color_p->full), w * h, true);
  gfx.endWrite();

  ::lv_disp_flush_ready(disp);
}

void setup() {
  M5.begin();
  gfx.begin();
  gfx.setRotation(3);

  ::lv_init();
  ::lv_disp_draw_buf_init(&draw_buf, buf, NULL, screenWidth * 10);

  static lv_disp_drv_t disp_drv;
  ::lv_disp_drv_init(&disp_drv);
  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);

  /* Create simple label */
  lv_obj_t *label = ::lv_label_create(::lv_scr_act());
  ::lv_label_set_text(label, "Aikatsu! 10th anniversary.");
  ::lv_obj_align(label, LV_ALIGN_CENTER, 0, 0);
}

void loop() {
  ::lv_timer_handler();
  ::delay(5);
}