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https://github.com/STMicroelectronics/STM32CubeF7.git
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313 lines
10 KiB
C
313 lines
10 KiB
C
/**
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******************************************************************************
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* @file LTDC/LTDC_Display_1Layer/Src/main.c
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* @author MCD Application Team
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* @brief This example provides a description of how to configure LTDC peripheral
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* to display BMP image on LCD using only one layer.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2018 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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#include "RGB565_480x272.h"
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/** @addtogroup STM32F7xx_HAL_Examples
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* @{
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*/
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/** @addtogroup LTDC_Display_1Layer
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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static void LCD_Config(void);
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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static void CPU_CACHE_Enable(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
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/* Enable the CPU Cache */
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CPU_CACHE_Enable();
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/* STM32F7xx HAL library initialization:
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- Configure the Flash ART accelerator on ITCM interface
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 216 MHz */
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SystemClock_Config();
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/* LCD clock configuration */
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/* PLLSAI_VCO Input = HSE_VALUE/PLL_M = 1 Mhz */
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/* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN = 192 Mhz */
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/* PLLLCDCLK = PLLSAI_VCO Output/PLLSAIR = 192/5 = 38.4 Mhz */
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/* LTDC clock frequency = PLLLCDCLK / LTDC_PLLSAI_DIVR_4 = 38.4/4 = 9.6Mhz */
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PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
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PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
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PeriphClkInitStruct.PLLSAI.PLLSAIR = 5;
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PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_4;
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HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
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/* Configure LED1 */
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BSP_LED_Init(LED1);
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/* Configure LCD : Only one layer is used */
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LCD_Config();
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 216000000
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* HCLK(Hz) = 216000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 25000000
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* PLL_M = 25
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* PLL_N = 432
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* PLL_P = 2
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* PLL_Q = 9
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 7
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* @param None
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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HAL_StatusTypeDef ret = HAL_OK;
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 25;
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RCC_OscInitStruct.PLL.PLLN = 432;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 9;
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ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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/* Activate the OverDrive to reach the 216 MHz Frequency */
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ret = HAL_PWREx_EnableOverDrive();
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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}
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/**
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* @brief LCD Configuration.
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* @note This function Configure tha LTDC peripheral :
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* 1) Configure the Pixel Clock for the LCD
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* 2) Configure the LTDC Timing and Polarity
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* 3) Configure the LTDC Layer 1 :
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* - The frame buffer is located at FLASH memory
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* - The Layer size configuration : 480x272
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* @retval
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* None
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*/
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static void LCD_Config(void)
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{
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static LTDC_HandleTypeDef hltdc_F;
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LTDC_LayerCfgTypeDef pLayerCfg;
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/* LTDC Initialization -------------------------------------------------------*/
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/* Polarity configuration */
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/* Initialize the horizontal synchronization polarity as active low */
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hltdc_F.Init.HSPolarity = LTDC_HSPOLARITY_AL;
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/* Initialize the vertical synchronization polarity as active low */
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hltdc_F.Init.VSPolarity = LTDC_VSPOLARITY_AL;
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/* Initialize the data enable polarity as active low */
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hltdc_F.Init.DEPolarity = LTDC_DEPOLARITY_AL;
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/* Initialize the pixel clock polarity as input pixel clock */
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hltdc_F.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
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/* The RK043FN48H LCD 480x272 is selected */
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/* Timing Configuration */
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hltdc_F.Init.HorizontalSync = (RK043FN48H_HSYNC - 1);
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hltdc_F.Init.VerticalSync = (RK043FN48H_VSYNC - 1);
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hltdc_F.Init.AccumulatedHBP = (RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
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hltdc_F.Init.AccumulatedVBP = (RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
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hltdc_F.Init.AccumulatedActiveH = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
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hltdc_F.Init.AccumulatedActiveW = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
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hltdc_F.Init.TotalHeigh = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP + RK043FN48H_VFP - 1);
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hltdc_F.Init.TotalWidth = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP + RK043FN48H_HFP - 1);
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/* Configure R,G,B component values for LCD background color : all black background */
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hltdc_F.Init.Backcolor.Blue = 0;
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hltdc_F.Init.Backcolor.Green = 0;
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hltdc_F.Init.Backcolor.Red = 0;
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hltdc_F.Instance = LTDC;
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/* Layer1 Configuration ------------------------------------------------------*/
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/* Windowing configuration */
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/* In this case all the active display area is used to display a picture then :
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Horizontal start = horizontal synchronization + Horizontal back porch = 43
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Vertical start = vertical synchronization + vertical back porch = 12
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Horizontal stop = Horizontal start + window width -1 = 43 + 480 -1
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Vertical stop = Vertical start + window height -1 = 12 + 272 -1 */
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pLayerCfg.WindowX0 = 0;
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pLayerCfg.WindowX1 = 480;
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pLayerCfg.WindowY0 = 0;
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pLayerCfg.WindowY1 = 272;
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/* Pixel Format configuration*/
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pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
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/* Start Address configuration : frame buffer is located at FLASH memory */
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pLayerCfg.FBStartAdress = (uint32_t)&RGB565_480x272;
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/* Alpha constant (255 == totally opaque) */
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pLayerCfg.Alpha = 255;
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/* Default Color configuration (configure A,R,G,B component values) : no background color */
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pLayerCfg.Alpha0 = 0; /* fully transparent */
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pLayerCfg.Backcolor.Blue = 0;
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pLayerCfg.Backcolor.Green = 0;
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pLayerCfg.Backcolor.Red = 0;
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/* Configure blending factors */
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pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_CA;
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pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
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/* Configure the number of lines and number of pixels per line */
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pLayerCfg.ImageWidth = 480;
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pLayerCfg.ImageHeight = 272;
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/* Configure the LTDC */
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if(HAL_LTDC_Init(&hltdc_F) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Configure the Layer*/
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if(HAL_LTDC_ConfigLayer(&hltdc_F, &pLayerCfg, 1) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED1 on */
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BSP_LED_On(LED1);
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while(1)
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{
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}
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}
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/**
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* @brief CPU L1-Cache enable.
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* @param None
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* @retval None
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*/
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static void CPU_CACHE_Enable(void)
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{
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/* Enable I-Cache */
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SCB_EnableICache();
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/* Enable D-Cache */
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SCB_EnableDCache();
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t* file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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