1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-10-14 spaceman first version
*/
#include <board.h>
#ifdef BSP_USING_LCD
#include <lcd_port.h>
#include "lcd.h"
#include "drv_gpio.h"
#define DRV_DEBUG
#define LOG_TAG "drv.lcd"
#include <drv_log.h>
#define LCD_DEVICE(dev) (struct drv_lcd_device*)(dev)
static __align(256) volatile rt_uint32_t LTDC_Buf1[LCD_WIDTH * LCD_HEIGHT] = {0x00};
static __align(256) volatile rt_uint32_t LTDC_Buf2[LCD_WIDTH * LCD_HEIGHT] = {0x00};
struct drv_lcd_device
{
struct rt_device parent;
struct rt_device_graphic_info lcd_info;
struct rt_semaphore lcd_lock;
/* 0:front_buf is being used 1: back_buf is being used*/
rt_uint8_t cur_buf;
rt_uint8_t *front_buf;
rt_uint8_t *back_buf;
};
struct drv_lcd_device _lcd;
static rt_err_t drv_lcd_init(struct rt_device *device)
{
struct drv_lcd_device *lcd = LCD_DEVICE(device);
/* nothing, right now */
lcd = lcd;
return RT_EOK;
}
static rt_err_t drv_lcd_control(struct rt_device *device, int cmd, void *args)
{
struct drv_lcd_device *lcd = LCD_DEVICE(device);
switch (cmd)
{
case RTGRAPHIC_CTRL_RECT_UPDATE:
{
/* update */
if (_lcd.cur_buf)
{
/* back_buf is being used */
_lcd.lcd_info.framebuffer = _lcd.back_buf;
/* Configure the color frame buffer start address */
LTDC->DP_SWT = 0;
_lcd.cur_buf = 0;
}
else
{
/* front_buf is being used */
_lcd.lcd_info.framebuffer = _lcd.front_buf;
/* Configure the color frame buffer start address */
LTDC->DP_SWT = 1;
_lcd.cur_buf = 1;
}
rt_sem_take(&_lcd.lcd_lock, RT_TICK_PER_SECOND / 20);
}
break;
case RTGRAPHIC_CTRL_GET_INFO:
{
struct rt_device_graphic_info *info = (struct rt_device_graphic_info *)args;
RT_ASSERT(info != RT_NULL);
info->pixel_format = lcd->lcd_info.pixel_format;
info->bits_per_pixel = LCD_BITS_PER_PIXEL;
info->width = lcd->lcd_info.width;
info->height = lcd->lcd_info.height;
info->framebuffer = lcd->lcd_info.framebuffer;
}
break;
}
return RT_EOK;
}
rt_err_t stm32_lcd_init(struct drv_lcd_device *lcd)
{
LCD_Initial((rt_uint32_t)lcd->front_buf, (rt_uint32_t)lcd->back_buf);
return RT_EOK;
}
#if defined(LCD_BACKLIGHT_USING_PWM)
void turn_on_lcd_backlight(void)
{
struct rt_device_pwm *pwm_dev;
/* turn on the LCD backlight */
pwm_dev = (struct rt_device_pwm *)rt_device_find(LCD_PWM_DEV_NAME);
/* pwm frequency:100K = 10000ns */
rt_pwm_set(pwm_dev, LCD_PWM_DEV_CHANNEL, 10000, 10000);
rt_pwm_enable(pwm_dev, LCD_PWM_DEV_CHANNEL);
}
#elif defined(LCD_BACKLIGHT_USING_GPIO)
void turn_on_lcd_backlight(void)
{
rt_pin_mode(LCD_BL_GPIO_NUM, PIN_MODE_OUTPUT);
rt_pin_mode(LCD_DISP_GPIO_NUM, PIN_MODE_OUTPUT);
rt_pin_write(LCD_DISP_GPIO_NUM, PIN_HIGH);
rt_pin_write(LCD_BL_GPIO_NUM, PIN_HIGH);
}
#else
void turn_on_lcd_backlight(void)
{
}
#endif
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops lcd_ops =
{
drv_lcd_init,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
drv_lcd_control
};
#endif
void Lcd_ColorBox(struct drv_lcd_device *lcd, rt_uint16_t xStart, rt_uint16_t yStart, rt_uint16_t xLong, rt_uint16_t yLong, rt_uint32_t Color)
{
rt_uint16_t i, j;
rt_uint32_t temp;
rt_uint32_t *LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
temp = lcd->lcd_info.height * xStart;
for (i = 0; i < yLong; i++)
{
for (j = 0; j < xLong; j++)
LTDC_Buf[yStart + i + lcd->lcd_info.height * j + temp] = Color;
}
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
}
void LCD_Fill_Pic(struct drv_lcd_device *lcd, rt_uint16_t x, rt_uint16_t y, rt_uint16_t pic_H, rt_uint16_t pic_V, rt_uint32_t *pic)
{
rt_uint32_t *LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
rt_uint16_t i, j;
rt_uint32_t Xstart, k = 0;
Xstart = lcd->lcd_info.height * x;
for (i = 0; i < pic_V; i++)
{
for (j = 0; j < pic_H; j++)
LTDC_Buf[Xstart + i + lcd->lcd_info.height * j + y] = pic[k++];
}
}
void DrawPixel(struct drv_lcd_device *lcd, rt_uint16_t x, rt_uint16_t y, int Color)
{
rt_uint32_t *LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
LTDC_Buf[y + lcd->lcd_info.height * x] = Color;
}
int drv_lcd_hw_init(void)
{
rt_err_t result = RT_EOK;
struct rt_device *device = &_lcd.parent;
/* memset _lcd to zero */
rt_memset(&_lcd, 0x00, sizeof(_lcd));
/* init lcd_lock semaphore */
result = rt_sem_init(&_lcd.lcd_lock, "lcd_lock", 0, RT_IPC_FLAG_FIFO);
if (result != RT_EOK)
{
LOG_E("init semaphore failed!\n");
result = -RT_ENOMEM;
goto __exit;
}
/* config LCD dev info */
_lcd.lcd_info.height = LCD_HEIGHT;
_lcd.lcd_info.width = LCD_WIDTH;
_lcd.lcd_info.bits_per_pixel = LCD_BITS_PER_PIXEL;
_lcd.lcd_info.pixel_format = LCD_PIXEL_FORMAT;
/* malloc memory for Triple Buffering */
_lcd.back_buf = (rt_uint8_t *)LTDC_Buf1;
_lcd.front_buf = (rt_uint8_t *)LTDC_Buf2;
_lcd.lcd_info.framebuffer = _lcd.back_buf;
if (_lcd.lcd_info.framebuffer == RT_NULL || _lcd.back_buf == RT_NULL || _lcd.front_buf == RT_NULL)
{
LOG_E("init frame buffer failed!\n");
result = -RT_ENOMEM;
goto __exit;
}
/* memset buff to 0xFF */
rt_memset(_lcd.back_buf, 0xFF, LCD_BUF_SIZE);
rt_memset(_lcd.front_buf, 0xFF, LCD_BUF_SIZE);
device->type = RT_Device_Class_Graphic;
#ifdef RT_USING_DEVICE_OPS
device->ops = &lcd_ops;
#else
device->init = drv_lcd_init;
device->control = drv_lcd_control;
#endif
/* register lcd device */
rt_device_register(device, "lcd", RT_DEVICE_FLAG_RDWR);
/* init stm32 LTDC */
if (stm32_lcd_init(&_lcd) != RT_EOK)
{
result = -RT_ERROR;
goto __exit;
}
else
{
turn_on_lcd_backlight();
}
LOG_D("lcd register successful!");
__exit:
if (result != RT_EOK)
{
rt_sem_detach(&_lcd.lcd_lock);
}
return result;
}
INIT_DEVICE_EXPORT(drv_lcd_hw_init);
#ifdef DRV_DEBUG
#ifdef FINSH_USING_MSH
int lcd_test()
{
struct drv_lcd_device *lcd;
lcd = (struct drv_lcd_device *)rt_device_find("lcd");
if(lcd == RT_NULL)
{
LOG_E("find lcd device failed!\n");
return -1;
}
rt_uint32_t *LTDC_Buf = RT_NULL;
LOG_D("red");
/* red */
LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
for (int i = 0; i < LCD_BUF_SIZE / 4; i++)
LTDC_Buf[i] = Red;
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
LOG_D("green");
/* green */
LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
for (int i = 0; i < LCD_BUF_SIZE / 4; i++)
LTDC_Buf[i] = Green;
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
LOG_D("blue");
/* blue */
LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
for (int i = 0; i < LCD_BUF_SIZE / 4; i++)
LTDC_Buf[i] = Blue;
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
return 0;
}
MSH_CMD_EXPORT(lcd_test, lcd_test);
#endif /* FINSH_USING_MSH */
#endif /* DRV_DEBUG */
#endif /* BSP_USING_LCD */
|
