1 /*
2 * Copyright (c) 2006-2023, 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 * 2021-12-24 Rb Refresh using dma2d
10 */
11 #include <lvgl.h>
12 #include <lcd_port.h>
13
14 //#define DRV_DEBUG
15 #define LOG_TAG "LVGL.port.disp"
16 #include <drv_log.h>
17
18 /*A static or global variable to store the buffers*/
19 static lv_disp_draw_buf_t disp_buf;
20
21 static rt_device_t lcd_device = RT_NULL;
22 static struct rt_device_graphic_info info;
23
24 static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
25
26 #define DISP_BUF_SIZE (LV_HOR_RES_MAX * LV_VER_RES_MAX / 2)
27
28 static lv_disp_drv_t g_disp_drv;
29 extern LTDC_HandleTypeDef hltdc;
30 volatile rt_bool_t g_gpu_state = RT_FALSE;
31
lvgl_dma_config(void)32 static void lvgl_dma_config(void)
33 {
34 HAL_NVIC_SetPriority(DMA2D_IRQn, 2, 0);
35 HAL_NVIC_EnableIRQ(DMA2D_IRQn);
36 __HAL_RCC_DMA2D_CLK_ENABLE();
37 }
38
lcd_fb_flush(lv_disp_drv_t * disp_drv,const lv_area_t * area,lv_color_t * color_p)39 static void lcd_fb_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
40 {
41 uint32_t OffLineSrc = LV_HOR_RES_MAX - (area->x2 - area->x1 + 1);
42 uint32_t addr = (uint32_t) hltdc.LayerCfg[0].FBStartAdress + 2 * (LV_HOR_RES_MAX * area->y1 + area->x1);
43
44 DMA2D->CR = 0x00000000UL | (1 << 9);
45 DMA2D->FGMAR = (uint32_t) (uint16_t*) (color_p);
46 DMA2D->OMAR = (uint32_t) addr;
47
48 DMA2D->FGOR = 0;
49 DMA2D->OOR = OffLineSrc;
50
51 DMA2D->FGPFCCR = DMA2D_OUTPUT_RGB565;
52 DMA2D->OPFCCR = DMA2D_OUTPUT_RGB565;
53
54 DMA2D->NLR = (area->y2 - area->y1 + 1) | ((area->x2 - area->x1 + 1) << 16);
55 DMA2D->CR |= DMA2D_IT_TC | DMA2D_IT_TE | DMA2D_IT_CE;
56 DMA2D->CR |= DMA2D_CR_START;
57
58 g_gpu_state = RT_TRUE;
59 }
60
DMA2D_IRQHandler(void)61 void DMA2D_IRQHandler(void)
62 {
63 rt_interrupt_enter();
64
65 if ((DMA2D->ISR & DMA2D_FLAG_TC) != 0U)
66 {
67 if ((DMA2D->CR & DMA2D_IT_TC) != 0U)
68 {
69
70 DMA2D->CR &= ~DMA2D_IT_TC;
71 DMA2D->IFCR = DMA2D_FLAG_TC;
72
73 if (g_gpu_state == RT_TRUE)
74 {
75 g_gpu_state = RT_FALSE;
76 lv_disp_flush_ready(&g_disp_drv);
77 }
78 }
79 }
80
81 rt_interrupt_leave();
82 }
83
lv_port_disp_init(void)84 void lv_port_disp_init(void)
85 {
86 rt_err_t result;
87
88 void *lv_disp_buf1 = RT_NULL;
89 void *lv_disp_buf2 = RT_NULL;
90
91 lv_disp_buf1 = rt_malloc(DISP_BUF_SIZE * sizeof(lv_color_t));
92 rt_memset(lv_disp_buf1, 0, DISP_BUF_SIZE * sizeof(lv_color_t));
93 RT_ASSERT(lv_disp_buf1 != RT_NULL);
94
95 lv_disp_buf2 = rt_malloc(DISP_BUF_SIZE * sizeof(lv_color_t));
96 rt_memset(lv_disp_buf2, 0, DISP_BUF_SIZE * sizeof(lv_color_t));
97 RT_ASSERT(lv_disp_buf2 != RT_NULL);
98
99 lcd_device = rt_device_find("lcd");
100
101 if (lcd_device == 0)
102 {
103 LOG_E("lcd_device error!");
104 return;
105 }
106
107 result = rt_device_open(lcd_device, 0);
108
109 if (result != RT_EOK)
110 {
111 LOG_E("error!");
112 return;
113 }
114
115 /* get framebuffer address */
116 result = rt_device_control(lcd_device, RTGRAPHIC_CTRL_GET_INFO, &info);
117
118 if (result != RT_EOK)
119 {
120 LOG_E("error!");
121 /* get device information failed */
122 return;
123 }
124
125 RT_ASSERT (info.bits_per_pixel == 8 || info.bits_per_pixel == 16 ||
126 info.bits_per_pixel == 24 || info.bits_per_pixel == 32);
127
128 lvgl_dma_config();
129
130 /*Initialize `disp_buf` with the buffer(s).*/
131 lv_disp_draw_buf_init(&disp_buf, lv_disp_buf1, lv_disp_buf2, DISP_BUF_SIZE);
132
133 lv_disp_drv_init(&disp_drv); /*Basic initialization*/
134
135 /*Set the resolution of the display*/
136 disp_drv.hor_res = info.width;
137 disp_drv.ver_res = info.height;
138
139 /*Set a display buffer*/
140 disp_drv.draw_buf = &disp_buf;
141
142 /*Used to copy the buffer's content to the display*/
143 disp_drv.flush_cb = lcd_fb_flush;
144
145 /*Finally register the driver*/
146 lv_disp_drv_register(&disp_drv);
147
148 g_disp_drv = disp_drv;
149 }
150