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/**
******************************************************************************
* @file LTDC/LTDC_ColorKeying/Src/main.c
* @author MCD Application Team
* @brief This example describes how to enable and use
* the LTDC color keying functionality.
******************************************************************************
* @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_480x272.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup LTDC_ColorKeying
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define PRESSED_FIRST 0x00
#define PRESSED_SECOND 0x01
#define RGB565_COLOR_KEY 0xFFFFFF
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
LTDC_HandleTypeDef LtdcHandle;
uint8_t ubPressedButton = PRESSED_FIRST;
__IO uint32_t ReloadFlag = 0;
/* Private function prototypes -----------------------------------------------*/
static void LCD_Config(void);
static void SystemClock_Config(void);
static void Error_Handler(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
static uint8_t buttonState = 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- Configure TAMPER Button ############################################*/
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_GPIO);
/*##-2- LCD Configuration ##################################################*/
LCD_Config();
/*##-3- Configure Color Keying ############################################*/
HAL_LTDC_ConfigColorKeying_NoReload(&LtdcHandle, RGB565_COLOR_KEY, LTDC_LAYER_1);
/* Infinite loop */
while (1)
{
if(BSP_PB_GetState(BUTTON_TAMPER) == GPIO_PIN_SET)
{
/* user button is pressed */
buttonState = 1;
}
else if(buttonState == 1)
{
/* user button is released */
buttonState = 0;
if(ubPressedButton == PRESSED_FIRST)
{
/* Enable Color Keying on layer 1 */
HAL_LTDC_EnableColorKeying_NoReload(&LtdcHandle, LTDC_LAYER_1);
ubPressedButton = PRESSED_SECOND;
}
else
{
/* Disable Color Keying on layer 1 */
HAL_LTDC_DisableColorKeying_NoReload(&LtdcHandle, LTDC_LAYER_1);
ubPressedButton = PRESSED_FIRST;
}
ReloadFlag = 0;
HAL_LTDC_Reload(&LtdcHandle,LTDC_SRCR_VBR);
while(ReloadFlag == 0)
{
/* wait till reload takes effect (in the next vertical blanking period) */
}
}
}
}
/**
* @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 :
* - The frame buffer is located at FLASH memory
* - The Layer size configuration : 480x272
* 4) Configure the Color Keying for Layer 1.
* @retval
* None
*/
static void LCD_Config(void)
{
LTDC_LayerCfgTypeDef pLayerCfg;
/* 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 */
/* In this case all the active display area is used to display a picture then :
Horizontal start = horizontal synchronization + Horizontal back porch = 43
Vertical start = vertical synchronization + vertical back porch = 12
Horizontal stop = Horizontal start + window width -1 = 43 + 480 -1
Vertical stop = Vertical start + window height -1 = 12 + 272 -1 */
pLayerCfg.WindowX0 = 0;
pLayerCfg.WindowX1 = 480;
pLayerCfg.WindowY0 = 0;
pLayerCfg.WindowY1 = 272;
/* Pixel Format configuration*/
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg.FBStartAdress = (uint32_t)&RGB565_480x272;
/* 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_CA;
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
/* Configure the number of lines and number of pixels per line */
pLayerCfg.ImageWidth = 480;
pLayerCfg.ImageHeight = 272;
/* Configure the LTDC */
if(HAL_LTDC_Init(&LtdcHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Configure the Layer */
if(HAL_LTDC_ConfigLayer(&LtdcHandle, &pLayerCfg, LTDC_LAYER_1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
}
/**
* @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 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
/**
* @}
*/
/**
* @}
*/