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 * 2021-12-17 Wayne The first version
9 */
10 #include <lvgl.h>
11
12 #define LOG_TAG "lvgl.disp"
13 #define DBG_ENABLE
14 #define DBG_SECTION_NAME LOG_TAG
15 #define DBG_LEVEL DBG_ERROR
16 #define DBG_COLOR
17 #include <rtdbg.h>
18
19 /*A static or global variable to store the buffers*/
20 static lv_disp_draw_buf_t disp_buf;
21 static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
22
23 static rt_device_t lcd_device = 0;
24 static struct rt_device_graphic_info info;
25
lcd_fb_flush(lv_disp_drv_t * disp_drv,const lv_area_t * area,lv_color_t * color_p)26 static void lcd_fb_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
27 {
28 /* Rendering */
29 struct rt_device_rect_info rect;
30
31 rect.x = area->x1;
32 rect.y = area->y1;
33 rect.width = area->x2 - area->x1 + 1;
34 rect.height = area->y2 - area->y1 + 1;
35
36 rt_device_control(lcd_device, RTGRAPHIC_CTRL_RECT_UPDATE, &rect);
37 lv_disp_flush_ready(disp_drv);
38 }
39
lcd_perf_monitor(struct _lv_disp_drv_t * disp_drv,uint32_t time,uint32_t px)40 void lcd_perf_monitor(struct _lv_disp_drv_t *disp_drv, uint32_t time, uint32_t px)
41 {
42 rt_kprintf("Elapsed: %dms, Pixel: %d, Bytes:%d\n", time, px, px * sizeof(lv_color_t));
43 }
44
lv_port_disp_init(void)45 void lv_port_disp_init(void)
46 {
47 rt_err_t result;
48 void *buf1 = RT_NULL;
49
50 lcd_device = rt_device_find("lcd");
51 if (lcd_device == 0)
52 {
53 LOG_E("error!");
54 return;
55 }
56
57 /* get framebuffer address */
58 result = rt_device_control(lcd_device, RTGRAPHIC_CTRL_GET_INFO, &info);
59 if (result != RT_EOK && info.framebuffer == RT_NULL)
60 {
61 LOG_E("error!");
62 /* get device information failed */
63 return;
64 }
65
66 RT_ASSERT(info.bits_per_pixel == 8 || info.bits_per_pixel == 16 ||
67 info.bits_per_pixel == 24 || info.bits_per_pixel == 32);
68
69 buf1 = (void *)info.framebuffer;
70 rt_kprintf("LVGL: Use one buffers - buf1@%08x, size: %d bytes\n", buf1, info.smem_len);
71
72 /*Initialize `disp_buf` with the buffer(s).*/
73 lv_disp_draw_buf_init(&disp_buf, buf1, RT_NULL, info.smem_len / (info.bits_per_pixel / 8));
74
75 result = rt_device_open(lcd_device, 0);
76 if (result != RT_EOK)
77 {
78 LOG_E("error!");
79 return;
80 }
81
82 lv_disp_drv_init(&disp_drv); /*Basic initialization*/
83
84 /*Set the resolution of the display*/
85 disp_drv.hor_res = info.width;
86 disp_drv.ver_res = info.height;
87
88 /*Set a display buffer*/
89 disp_drv.draw_buf = &disp_buf;
90
91 /*Write the internal buffer (draw_buf) to the display*/
92 disp_drv.flush_cb = lcd_fb_flush;
93
94 /* Called after every refresh cycle to tell the rendering and flushing time + the number of flushed pixels */
95 //disp_drv.monitor_cb = lcd_perf_monitor;
96
97 /*Finally register the driver*/
98 lv_disp_drv_register(&disp_drv);
99 }
100