Outline ![]()
Files ![]()
loading...
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
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
/**
******************************************************************************
* @file LTDC/LTDC_Display_2Layers/Src/main.c
* @author MCD Application Team
* @brief This example describes how to configure the LTDC peripheral
* to display two Layers at the same time.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "RGB565_320x240.h"
#include "L8_320x240.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup LTDC_Display_2Layer
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
LTDC_HandleTypeDef LtdcHandle;
__IO uint32_t ReloadFlag = 0;
/* Pictures position */
uint32_t Xpos1 = 0;
uint32_t Xpos2 = 160;
uint32_t Ypos1 = 0;
uint32_t Ypos2 = 32;
/* Private function prototypes -----------------------------------------------*/
static void LCD_Config(void);
static void SystemClock_Config(void);
static void Error_Handler(void);
static void PicturesPosition(uint32_t* x1,
uint32_t* y1,
uint32_t* x2,
uint32_t* y2,
uint32_t index);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
uint32_t index = 0;
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/*##-1- LCD Configuration ##################################################*/
/* Configure 2 layers w/ Blending and CLUT loading for layer 1 */
LCD_Config();
/*##-2- CLUT Configuration #################################################*/
HAL_LTDC_ConfigCLUT(&LtdcHandle, (uint32_t *)L8_320x240_CLUT, 256, 0);
/*##-3- Enable CLUT For Layer 1 ############################################*/
HAL_LTDC_EnableCLUT(&LtdcHandle, 0);
/* Infinite loop */
while (1)
{
for (index = 0; index < 32; index++)
{
/* calculate new picture position */
PicturesPosition(&Xpos1, &Ypos1, &Xpos2, &Ypos2, (index+1));
/* reconfigure the layer1 position without Reloading*/
HAL_LTDC_SetWindowPosition_NoReload(&LtdcHandle, Xpos1, Ypos1, 0);
/* reconfigure the layer2 position without Reloading*/
HAL_LTDC_SetWindowPosition_NoReload(&LtdcHandle, Xpos2, Ypos2, 1);
/*Ask for LTDC reload within next vertical blanking*/
ReloadFlag = 0;
HAL_LTDC_Reload(&LtdcHandle,LTDC_SRCR_VBR);
while(ReloadFlag == 0)
{
/* wait till reload takes effect (in the next vertical blanking period) */
}
}
HAL_Delay(500);
for (index = 0; index < 32; index++)
{
/* calculate new picture position */
PicturesPosition(&Xpos2, &Ypos2, &Xpos1, &Ypos1, (index+1));
/* reconfigure the layer1 position without Reloading*/
HAL_LTDC_SetWindowPosition_NoReload(&LtdcHandle, Xpos1, Ypos1, 0);
/* reconfigure the layer2 position without Reloading*/
HAL_LTDC_SetWindowPosition_NoReload(&LtdcHandle, Xpos2, Ypos2, 1);
/*Ask for LTDC reload within next vertical blanking*/
ReloadFlag = 0;
HAL_LTDC_Reload(&LtdcHandle,LTDC_SRCR_VBR);
while(ReloadFlag == 0)
{
/* wait till reload takes effect (in the next vertical blanking period) */
}
}
HAL_Delay(500);
}
}
/**
* @brief calculate pictures position.
* @param x1: picture1 x position
* @param y1: picture1 y position
* @param x2: picture2 x position
* @param y2: picture2 y position
* @param index:
* @retval None
*/
static void PicturesPosition(uint32_t* x1, uint32_t* y1, uint32_t* x2, uint32_t* y2, uint32_t index)
{
/* picture1 position */
*x1 = index*5;
*y1 = index;
/* picture2 position */
*x2 = 160 - index*5;
*y2 = 32 - index;
}
/**
* @brief Reload Event callback.
* @param hltdc: pointer to a LTDC_HandleTypeDef structure that contains
* the configuration information for the LTDC.
* @retval None
*/
void HAL_LTDC_ReloadEventCallback(LTDC_HandleTypeDef *hltdc)
{
ReloadFlag = 1;
}
/**
* @brief LCD Configuration.
* @note This function Configure the LTDC peripheral :
* 1) Configure the Pixel Clock for the LCD
* 2) Configure the LTDC Timing and Polarity
* 3) Configure the LTDC Layer 1 :
* - indirect color (L8) as pixel format
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 320x240
* 4) Configure the LTDC Layer 2 :
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 320x240
* 5) Load 256 colors in CLUT address for Layer 1
* @retval
* None
*/
static void LCD_Config(void)
{
LTDC_LayerCfgTypeDef pLayerCfg;
LTDC_LayerCfgTypeDef pLayerCfg1;
/* LTDC Initialization -------------------------------------------------------*/
/* Polarity configuration */
/* Initialize the horizontal synchronization polarity as active low */
LtdcHandle.Init.HSPolarity = LTDC_HSPOLARITY_AL;
/* Initialize the vertical synchronization polarity as active low */
LtdcHandle.Init.VSPolarity = LTDC_VSPOLARITY_AL;
/* Initialize the data enable polarity as active low */
LtdcHandle.Init.DEPolarity = LTDC_DEPOLARITY_AL;
/* Initialize the pixel clock polarity as input pixel clock */
LtdcHandle.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
/* Timing configuration */
/* Horizontal synchronization width = Hsync - 1 */
LtdcHandle.Init.HorizontalSync = 40;
/* Vertical synchronization height = Vsync - 1 */
LtdcHandle.Init.VerticalSync = 9;
/* Accumulated horizontal back porch = Hsync + HBP - 1 */
LtdcHandle.Init.AccumulatedHBP = 42;
/* Accumulated vertical back porch = Vsync + VBP - 1 */
LtdcHandle.Init.AccumulatedVBP = 11;
/* Accumulated active width = Hsync + HBP + Active Width - 1 */
LtdcHandle.Init.AccumulatedActiveH = 283;
/* Accumulated active height = Vsync + VBP + Active Height - 1 */
LtdcHandle.Init.AccumulatedActiveW = 522;
/* Total height = Vsync + VBP + Active Height + VFP - 1 */
LtdcHandle.Init.TotalHeigh = 285;
/* Total width = Hsync + HBP + Active Width + HFP - 1 */
LtdcHandle.Init.TotalWidth = 524;
/* Configure R,G,B component values for LCD background color */
LtdcHandle.Init.Backcolor.Blue = 0;
LtdcHandle.Init.Backcolor.Green = 0;
LtdcHandle.Init.Backcolor.Red = 0;
LtdcHandle.Instance = LTDC;
/* Layer1 Configuration ------------------------------------------------------*/
/* Windowing configuration */
pLayerCfg.WindowX0 = 0;
pLayerCfg.WindowX1 = 320;
pLayerCfg.WindowY0 = 0;
pLayerCfg.WindowY1 = 240;
/* Pixel Format configuration*/
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_L8;
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg.FBStartAdress = (uint32_t)&L8_320x240;
/* Alpha constant (255 totally opaque) */
pLayerCfg.Alpha = 255;
/* Default Color configuration (configure A,R,G,B component values) */
pLayerCfg.Alpha0 = 0;
pLayerCfg.Backcolor.Blue = 0;
pLayerCfg.Backcolor.Green = 0;
pLayerCfg.Backcolor.Red = 0;
/* Configure blending factors */
pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
/* Configure the number of lines and number of pixels per line */
pLayerCfg.ImageWidth = 320;
pLayerCfg.ImageHeight = 240;
/* Layer2 Configuration ------------------------------------------------------*/
/* Windowing configuration */
pLayerCfg1.WindowX0 = 160;
pLayerCfg1.WindowX1 = 480;
pLayerCfg1.WindowY0 = 32;
pLayerCfg1.WindowY1 = 272;
/* Pixel Format configuration*/
pLayerCfg1.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg1.FBStartAdress = (uint32_t)&RGB565_320x240;
/* Alpha constant (255 totally opaque) */
pLayerCfg1.Alpha = 200;
/* Default Color configuration (configure A,R,G,B component values) */
pLayerCfg1.Alpha0 = 0;
pLayerCfg1.Backcolor.Blue = 0;
pLayerCfg1.Backcolor.Green = 0;
pLayerCfg1.Backcolor.Red = 0;
/* Configure blending factors */
pLayerCfg1.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
pLayerCfg1.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
/* Configure the number of lines and number of pixels per line */
pLayerCfg1.ImageWidth = 320;
pLayerCfg1.ImageHeight = 240;
/* Configure the LTDC */
if(HAL_LTDC_Init(&LtdcHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Background Layer */
if(HAL_LTDC_ConfigLayer(&LtdcHandle, &pLayerCfg, 0) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Foreground Layer */
if(HAL_LTDC_ConfigLayer(&LtdcHandle, &pLayerCfg1, 1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
}
/**
* @brief System and LTDC Clocks Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 180000000
* HCLK(Hz) = 180000000
* AHB Prescaler = 1
* APB1 Prescaler = 4
* APB2 Prescaler = 2
* HSE Frequency(Hz) = 25000000
* PLL_M = 25
* PLL_N = 360
* PLL_P = 2
* PLL_Q = 7
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 5
* The LTDC Clock is configured as follow :
* PLLSAIN = 192
* PLLSAIR = 5
* PLLSAIDivR = 4
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
/* Enable Power Control clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/*##-1- System Clock Configuration #########################################*/
/* Enable HSE Oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 25;
RCC_OscInitStruct.PLL.PLLN = 360;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
/* Activate the Over-Drive mode */
HAL_PWREx_EnableOverDrive();
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
/*##-2- LTDC Clock Configuration ###########################################*/
/* LCD clock configuration */
/* PLLSAI_VCO Input = HSE_VALUE/PLL_M = 1 MHz */
/* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN = 192 MHz */
/* PLLLCDCLK = PLLSAI_VCO Output/PLLSAIR = 192/5 = 38.4 MHz */
/* LTDC clock frequency = PLLLCDCLK / LTDC_PLLSAI_DIVR_4 = 38.4/4 = 9.6 MHz */
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
PeriphClkInitStruct.PLLSAI.PLLSAIR = 5;
PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_4;
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
/* Turn LED3 on */
BSP_LED_On(LED3);
while(1)
{
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/