1 /*
2 * Copyright (c) 2006-2021, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2021-10-18 Meco Man The first version
9 */
10 #include <lvgl.h>
11 #include <drv_lcd.h>
12
13 #define MY_DISP_HOR_RES LCD_W
14 #define DISP_BUFFER_LINES (LCD_H/5)
15
16 /*A static or global variable to store the buffers*/
17 static lv_disp_draw_buf_t disp_buf;
18
19 /*Descriptor of a display driver*/
20 static lv_disp_drv_t disp_drv;
21
22 /*Static or global buffer(s). The second buffer is optional*/
23 static lv_color_t buf_1[MY_DISP_HOR_RES * DISP_BUFFER_LINES];
24
25 /*Flush the content of the internal buffer the specific area on the display
26 *You can use DMA or any hardware acceleration to do this operation in the background but
27 *'lv_disp_flush_ready()' has to be called when finished.*/
disp_flush(lv_disp_drv_t * disp_drv,const lv_area_t * area,lv_color_t * color_p)28 static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
29 {
30 /* color_p is a buffer pointer; the buffer is provided by LVGL */
31 lcd_fill_array(area->x1, area->y1, area->x2, area->y2, color_p);
32
33 /*IMPORTANT!!!
34 *Inform the graphics library that you are ready with the flushing*/
35 lv_disp_flush_ready(disp_drv);
36 }
37
lv_port_disp_init(void)38 void lv_port_disp_init(void)
39 {
40 /*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */
41 lv_disp_draw_buf_init(&disp_buf, buf_1, RT_NULL, MY_DISP_HOR_RES * DISP_BUFFER_LINES);
42
43 lv_disp_drv_init(&disp_drv); /*Basic initialization*/
44
45 /*Set the resolution of the display*/
46 disp_drv.hor_res = LCD_W;
47 disp_drv.ver_res = LCD_H;
48
49 /*Set a display buffer*/
50 disp_drv.draw_buf = &disp_buf;
51
52 /*Used to copy the buffer's content to the display*/
53 disp_drv.flush_cb = disp_flush;
54
55 /*Finally register the driver*/
56 lv_disp_drv_register(&disp_drv);
57 }
58