1 /*
2 * Copyright (c) 2006-2022, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2022-02-01 Rudy Lo The first version
9 */
10
11 #include <lvgl.h>
12 #include <rtthread.h>
13 #include "drv_spi_ili9488.h"
14
15 #define MY_DISP_HOR_RES (LCD_W)
16 #define DISP_BUFFER_LINES (LCD_H / 5)
17
18 /*A static or global variable to store the buffers*/
19 static lv_disp_draw_buf_t disp_buf;
20
21 /*Descriptor of a display driver*/
22 static lv_disp_drv_t disp_drv;
23
24 /*Static or global buffer(s). The second buffer is optional*/
25 static lv_color_t buf_1[MY_DISP_HOR_RES * DISP_BUFFER_LINES];
26 //static lv_color_t buf_2[MY_DISP_HOR_RES * DISP_BUFFER_LINES];
27
28 /*Flush the content of the internal buffer the specific area on the display
29 *You can use DMA or any hardware acceleration to do this operation in the background but
30 *'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)31 static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
32 {
33 /* color_p is a buffer pointer; the buffer is provided by LVGL */
34 lcd_fill_array(area->x1, area->y1, area->x2, area->y2, color_p);
35
36 /*IMPORTANT!!!
37 *Inform the graphics library that you are ready with the flushing*/
38 lv_disp_flush_ready(disp_drv);
39 }
40
lv_port_disp_init(void)41 void lv_port_disp_init(void)
42 {
43 /*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */
44 lv_disp_draw_buf_init(&disp_buf, buf_1, RT_NULL, MY_DISP_HOR_RES * DISP_BUFFER_LINES);
45
46 lv_disp_drv_init(&disp_drv); /*Basic initialization*/
47
48 /*Set the resolution of the display*/
49 disp_drv.hor_res = LCD_W;
50 disp_drv.ver_res = LCD_H;
51
52 /*Set a display buffer*/
53 disp_drv.draw_buf = &disp_buf;
54
55 /*Used to copy the buffer's content to the display*/
56 disp_drv.flush_cb = disp_flush;
57
58 /*Finally register the driver*/
59 lv_disp_drv_register(&disp_drv);
60 }
61