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STM32CubeF4/Projects/STM32F429I-Discovery/Examples/LTDC/LTDC_Display_2Layers/Src/main.c
Eya d599a824df Release v1.26.0
2021-03-03 14:55:52 +01:00

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/**
******************************************************************************
* @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
*
* <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "st_logo1.h"
#include "st_logo2.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 = 0;
uint32_t Ypos1 = 0;
uint32_t Ypos2 = 160;
/* 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 */
LCD_Config();
/* Infinite loop */
while (1)
{
for (index = 0; index < 40; 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 < 40; 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 = 0;
*y1 = index*4;
/* picture2 position */
*x2 = 0;
*y2 = 160 - index*4;
}
/**
* @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 :
* - direct color (RGB565) as pixel format
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 240x160
* 4) Configure the LTDC Layer 2 :
* - direct color (RGB565) as pixel format
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 240x160
* @retval
* None
*/
static void LCD_Config(void)
{
LTDC_LayerCfgTypeDef pLayerCfg;
LTDC_LayerCfgTypeDef pLayerCfg1;
/* Initialization of ILI9341 component*/
ili9341_Init();
/* 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 (Typical configuration from ILI9341 datasheet)
HSYNC=10 (9+1)
HBP=20 (29-10+1)
ActiveW=240 (269-20-10+1)
HFP=10 (279-240-20-10+1)
VSYNC=2 (1+1)
VBP=2 (3-2+1)
ActiveH=320 (323-2-2+1)
VFP=4 (327-320-2-2+1)
*/
/* Timing configuration */
/* Horizontal synchronization width = Hsync - 1 */
LtdcHandle.Init.HorizontalSync = 9;
/* Vertical synchronization height = Vsync - 1 */
LtdcHandle.Init.VerticalSync = 1;
/* Accumulated horizontal back porch = Hsync + HBP - 1 */
LtdcHandle.Init.AccumulatedHBP = 29;
/* Accumulated vertical back porch = Vsync + VBP - 1 */
LtdcHandle.Init.AccumulatedVBP = 3;
/* Accumulated active width = Hsync + HBP + Active Width - 1 */
LtdcHandle.Init.AccumulatedActiveH = 323;
/* Accumulated active height = Vsync + VBP + Active Heigh - 1 */
LtdcHandle.Init.AccumulatedActiveW = 269;
/* Total height = Vsync + VBP + Active Heigh + VFP - 1 */
LtdcHandle.Init.TotalHeigh = 327;
/* Total width = Hsync + HBP + Active Width + HFP - 1 */
LtdcHandle.Init.TotalWidth = 279;
/* 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 = 240;
pLayerCfg.WindowY0 = 0;
pLayerCfg.WindowY1 = 160;
/* Pixel Format configuration*/
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg.FBStartAdress = (uint32_t)&ST_LOGO_1;
/* 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 = 240;
pLayerCfg.ImageHeight = 160;
/* Layer2 Configuration ------------------------------------------------------*/
/* Windowing configuration */
pLayerCfg1.WindowX0 = 0;
pLayerCfg1.WindowX1 = 240;
pLayerCfg1.WindowY0 = 160;
pLayerCfg1.WindowY1 = 320;
/* Pixel Format configuration*/
pLayerCfg1.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg1.FBStartAdress = (uint32_t)&ST_LOGO_2;
/* 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 = 240;
pLayerCfg1.ImageHeight = 160;
/* 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 Clock 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) = 8000000
* PLL_M = 8
* 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 = 4
* PLLSAIDivR = 8
* @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 = 8;
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 = 192/4 = 48 MHz */
/* LTDC clock frequency = PLLLCDCLK / RCC_PLLSAIDIVR_8 = 48/8 = 6 MHz */
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
PeriphClkInitStruct.PLLSAI.PLLSAIR = 4;
PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_8;
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
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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