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/**
******************************************************************************
* @file LCD_DSI/LCD_DSI_VideoMode_DoubleBuffering/Src/main.c
* @author MCD Application Team
* @brief This example describes how to configure and use LCD DSI to display an image
* of size WVGA in mode landscape (800x480) using the STM32F4xx HAL API and BSP.
******************************************************************************
* @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 "image_320x240_argb8888.h"
#include "life_augmented_argb8888.h"
#include <string.h>
#include <stdio.h>
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/* Private typedef -----------------------------------------------------------*/
extern LTDC_HandleTypeDef hltdc_eval;
static DMA2D_HandleTypeDef hdma2d;
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
#define LAYER0_ADDRESS (LCD_FB_START_ADDRESS)
/* Private variables ---------------------------------------------------------*/
static __IO int32_t front_buffer = 0;
static __IO int32_t pend_buffer = -1;
static uint32_t ImageIndex = 0;
static const uint32_t * Images[] =
{
image_320x240_argb8888,
life_augmented_argb8888,
};
static const uint32_t Buffers[] =
{
LAYER0_ADDRESS,
LAYER0_ADDRESS + (800*480*4),
};
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void OnError_Handler(uint32_t condition);
static void CopyBuffer(uint32_t *pSrc,
uint32_t *pDst,
uint16_t x,
uint16_t y,
uint16_t xsize,
uint16_t ysize);
static void LCD_BriefDisplay(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief On Error Handler on condition TRUE.
* @param condition : Can be TRUE or FALSE
* @retval None
*/
static void OnError_Handler(uint32_t condition)
{
if(condition)
{
BSP_LED_On(LED3);
while(1) { ; } /* Blocking on error */
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
uint8_t lcd_status = LCD_OK;
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization: global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Initialize the LCD */
lcd_status = BSP_LCD_Init();
OnError_Handler(lcd_status != LCD_OK);
BSP_LCD_LayerDefaultInit(0, LAYER0_ADDRESS);
BSP_LCD_SelectLayer(0);
/* Set LTDC Line Event */
HAL_LTDC_ProgramLineEvent(&hltdc_eval, 0);
/* Display example brief */
LCD_BriefDisplay();
/* Copy Buffer 0 into buffer 1, so only image area to be redrawn later */
CopyBuffer((uint32_t *)Buffers[0], (uint32_t *)Buffers[1], 0, 0, 800, 480);
/* Infinite loop */
while (1)
{
if(pend_buffer < 0)
{
/* Prepare back buffer */
CopyBuffer((uint32_t *)Images[ImageIndex++], (uint32_t *)Buffers[1- front_buffer], 240, 160, 320, 240);
pend_buffer = 1- front_buffer;
if(ImageIndex >= 2)
{
ImageIndex = 0;
}
/* Wait some time before switching to next stage */
HAL_Delay(2000);
}
}
}
/**
* @brief Line Event callback.
* @param hltdc: pointer to a LTDC_HandleTypeDef structure that contains
* the configuration information for the LTDC.
* @retval None
*/
void HAL_LTDC_LineEventCallback(LTDC_HandleTypeDef *hltdc)
{
if(pend_buffer >= 0)
{
LTDC_LAYER(hltdc, 0)->CFBAR = ((uint32_t)Buffers[pend_buffer]);
__HAL_LTDC_RELOAD_IMMEDIATE_CONFIG(hltdc);
front_buffer = pend_buffer;
pend_buffer = -1;
}
HAL_LTDC_ProgramLineEvent(hltdc, 0);
}
/**
* @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) = 25000000
* PLL_M = 25
* PLL_N = 360
* PLL_P = 2
* PLL_Q = 7
* PLL_R = 6
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 5
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
HAL_StatusTypeDef ret = HAL_OK;
/* 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);
/* 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;
RCC_OscInitStruct.PLL.PLLR = 6;
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
if(ret != HAL_OK)
{
while(1) { ; }
}
/* Activate the OverDrive to reach the 180 MHz Frequency */
ret = HAL_PWREx_EnableOverDrive();
if(ret != HAL_OK)
{
while(1) { ; }
}
/* 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;
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
if(ret != HAL_OK)
{
while(1) { ; }
}
}
/**
* @brief Display Example description.
* @param None
* @retval None
*/
static void LCD_BriefDisplay(void)
{
BSP_LCD_Clear(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillRect(0, 0, 800, 112);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_DisplayStringAtLine(1, (uint8_t *)" LCD_DSI_VideoMode_DoubleBuffering");
BSP_LCD_SetFont(&Font16);
BSP_LCD_DisplayStringAtLine(4, (uint8_t *)"This example shows how to display images on LCD DSI using two buffers");
BSP_LCD_DisplayStringAtLine(5, (uint8_t *)"one for display and the other for draw ");
}
/**
* @brief Converts a line to an ARGB8888 pixel format.
* @param pSrc: Pointer to source buffer
* @param pDst: Output color
* @param xSize: Buffer width
* @param ColorMode: Input color mode
* @retval None
*/
static void CopyBuffer(uint32_t *pSrc, uint32_t *pDst, uint16_t x, uint16_t y, uint16_t xsize, uint16_t ysize)
{
uint32_t destination = (uint32_t)pDst + (y * 800 + x) * 4;
uint32_t source = (uint32_t)pSrc;
/*##-1- Configure the DMA2D Mode, Color Mode and output offset #############*/
hdma2d.Init.Mode = DMA2D_M2M;
hdma2d.Init.ColorMode = DMA2D_ARGB8888;
hdma2d.Init.OutputOffset = 800 - xsize;
/*##-2- DMA2D Callbacks Configuration ######################################*/
hdma2d.XferCpltCallback = NULL;
/*##-3- Foreground Configuration ###########################################*/
hdma2d.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
hdma2d.LayerCfg[1].InputAlpha = 0xFF;
hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_ARGB8888;
hdma2d.LayerCfg[1].InputOffset = 0;
hdma2d.Instance = DMA2D;
/* DMA2D Initialization */
if(HAL_DMA2D_Init(&hdma2d) == HAL_OK)
{
if(HAL_DMA2D_ConfigLayer(&hdma2d, 1) == HAL_OK)
{
if (HAL_DMA2D_Start(&hdma2d, source, destination, xsize, ysize) == HAL_OK)
{
/* Polling For DMA transfer */
HAL_DMA2D_PollForTransfer(&hdma2d, 100);
}
}
}
}
#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
/**
* @}
*/
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