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/**
******************************************************************************
* @file LCD_DSI/LCD_DSI_ULPM_DataClock/Src/main.c
* @author MCD Application Team
* @brief This example describes how to operate the DSI ULPM (Ultra Low Power Mode)
* on data lanes and clock lane in a use case with display in WVGA Landscape
* of size (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 "candies_800x480_argb8888.h"
#include <string.h>
#include <stdio.h>
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup LCD_DSI_ULPM_DataClock
* @{
*/
/* Private typedef -----------------------------------------------------------*/
extern DSI_HandleTypeDef hdsi_eval;
extern LTDC_HandleTypeDef hltdc_eval;
static DMA2D_HandleTypeDef hdma2d;
/* Private define ------------------------------------------------------------*/
/* Set LCD Frame Buffer address in SDRAM area */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint32_t frameCnt = 0;
char str_display[60] = "";
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void OnError_Handler(uint32_t condition);
static uint8_t CheckForUserInput(void);
static void CopyPicture(uint32_t *pSrc, uint32_t *pDst, uint16_t x, uint16_t y, uint16_t xsize, uint16_t ysize);
/* 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 Toggle Leds.
* @param None
* @retval None
*/
void Toggle_Leds(void)
{
static uint32_t ticks = 0;
if (ticks++ > 1000)
{
BSP_LED_Toggle(LED1);
ticks = 0;
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
uint8_t lcd_status = LCD_OK;
/* This sample code displays a fixed image 800x480 on LCD KoD in */
/* orientation mode landscape and DSI mode video burst */
/* 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 MFX */
BSP_IO_Init();
/* Initialize used Leds */
BSP_LED_Init(LED1);
BSP_LED_Init(LED3);
/* Configure Tamper push-button */
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_GPIO);
/* Initialize the LCD DSI in Video Burst mode with LANDSCAPE orientation */
lcd_status = BSP_LCD_Init();
OnError_Handler(lcd_status != LCD_OK);
/* Program a line event at line 0 */
HAL_LTDC_ProgramLineEvent(&hltdc_eval, 0);
/* Copy texture to be displayed on LCD from Flash to SDRAM */
CopyPicture((uint32_t *)&candies_800x480_argb8888, (uint32_t *)LCD_FB_START_ADDRESS, 0, 0, BSP_LCD_GetXSize(), BSP_LCD_GetYSize());
BSP_LCD_LayerDefaultInit(LTDC_ACTIVE_LAYER_BACKGROUND, LCD_FB_START_ADDRESS);
BSP_LCD_SelectLayer(LTDC_ACTIVE_LAYER_BACKGROUND);
/* Prepare area to display frame number in the image displayed on LCD */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillRect(0, 400, BSP_LCD_GetXSize(), 80);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font16);
/* Display title */
BSP_LCD_DisplayStringAt(0, 420, (uint8_t *) "LCD_DSI_ULPM_DataClock example", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 440, (uint8_t *) "Press TAMPER button to enter ULPM", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font16);
/* Infinite loop */
while (1)
{
/* Clear previous line */
BSP_LCD_ClearStringLine(460);
/* New text to display */
sprintf(str_display, ">> Frame Nb : %lu", frameCnt);
/* Print updated frame number */
BSP_LCD_DisplayStringAt(0, 460, (uint8_t *)str_display, CENTER_MODE);
if (CheckForUserInput() > 0)
{
/* Display Off with ULPM management Data and clock lane integrated */
BSP_LCD_DisplayOff();
HAL_Delay(100);
/* Switch Off DSI_CR_EN bit */
__HAL_DSI_DISABLE(&hdsi_eval);
/* Switch Off LTDCEN bit */
__HAL_LTDC_DISABLE(&hltdc_eval);
/* Enter ultra low power mode (data and clock lanes) */
/* This means : laneByteClock is derived from PLL.PLLR : ie ck_plldsi @ 60 MHz = 360 MHz / PLLR=6 */
/* DSI State machine start and wait until ULPM state for Data and Clock lanes, then when reached, switch off PLL DPHY */
HAL_DSI_EnterULPM(&hdsi_eval);
BSP_LED_On(LED1);
HAL_Delay(2000);
BSP_LCD_ClearStringLine(440);
BSP_LCD_DisplayStringAt(0, 440, (uint8_t *) " Exited ULPM with success - Press To enter Again ULPM. ", CENTER_MODE);
/* Exit ultra low power mode (data and clock lanes)
* This means : PLL DPHY is first restarted and wait until locked with its initial settings
* DSI State machine ULPM Out start and wait until ULPM state is Out for Data and Clock lanes
* laneByteClock is then switched back on PLL DPHY
*/
HAL_DSI_ExitULPM(&hdsi_eval);
BSP_LED_Off(LED1);
/* Switch On LTDCEN bit */
__HAL_LTDC_ENABLE(&hltdc_eval);
/* Switch On DSI_CR_EN bit */
__HAL_DSI_ENABLE(&hdsi_eval);
/* Display On with ULPM exit Data and clock lane integrated */
BSP_LCD_DisplayOn();
}
}
}
/**
* @brief Check for user input.
* @param None
* @retval Input state (1 : active / 0 : Inactive)
*/
static uint8_t CheckForUserInput(void)
{
if(BSP_PB_GetState(BUTTON_TAMPER) == GPIO_PIN_RESET)
{
HAL_Delay(10);
do
{
/* Clear previous line */
BSP_LCD_ClearStringLine(460);
/* New text to display */
sprintf(str_display, ">> Frame Nb : %lu", frameCnt);
/* Print updated frame number */
BSP_LCD_DisplayStringAt(0, 460, (uint8_t *)str_display, CENTER_MODE);
} while (BSP_PB_GetState(BUTTON_TAMPER) == GPIO_PIN_RESET);
return 1 ;
}
return 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 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)
{
/* Increment frame count */
frameCnt++;
HAL_LTDC_ProgramLineEvent(hltdc, 0);
}
/**
* @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 CopyPicture(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
/**
* @}
*/
/**
* @}
*/