Description
Recently, I have been working on adding lvgl on the board stm32l4r9i discovery. I used STM32CubeIDE with the assist of BSP folder from STM32Cube_FW_L4_V1.14.0. Currently, I can add lvgl into my project and create buttons on the screen. Without lvgl, i can draw different shapes with function from STM32l4r9i_discovery_lcd.c.
What MCU/Processor/Board and compiler are you using?
STM32l4r9i discovery
What do you experience?
Although i can create buttons on the screen. there are multiple lines appearing on the screen to. these line does not appear when i use example from BSP (when lvgl is not used).
I don’t if the flush function causes this lines or something else relating to background and foreground.
What do you expect?
i want to have a smooth buttons without lines accross them.
Code to reproduce
this is the code of my display driver.
https://github.com/HuyTyskland/LittlevGL_backupFile/blob/master/display.c
Use the ```c and ``` tags to format your code:
#include "lv_conf.h"
#include "display.h"
#include "lvgl/src/lv_hal/lv_hal.h"
#include "lvgl/lvgl.h"
#include "display.h"
#include "stm32l4xx_hal.h"
#include "stm32l4xx_hal_ltdc.h"
#include "stm32l4xx_hal_dma2d.h"
#include "stm32l4xx_hal_dsi.h"
#include "stm32l4xx_hal_rcc.h"
#include "stm32l4xx_hal_gfxmmu.h"
#include "stm32l4r9i_discovery.h"
#include "stm32l4r9i_discovery_lcd.h"
#include "stm32l4r9i_discovery_psram.h"
#define LAYER0_ADDRESS GFXMMU_VIRTUAL_BUFFER0_BASE
#define ActiveLayer LTDC_ACTIVE_LAYER_BACKGROUND
//**************STATIC PROTOTYPES**************
/* For LittlevGL */
static void my_flush_cb(lv_disp_drv_t *drv, const lv_area_t *area,
lv_color_t *color_p);
//static uint32_t ChangeColorFormat(lv_color_t *color_p);
/* LCD */
//static void putpixel(int x, int y, lv_color_t *color_p);
/* RAM */
//static void CopyBuffer(const uint32_t *pSrc, uint32_t *pDst, uint16_t x, uint16_t y, uint16_t xsize, uint16_t ysize);
static void CopyBuffer(uint32_t *pSrc, uint32_t *pDst, uint16_t x, uint16_t y, uint16_t xsize, uint16_t ysize);
// ************STATIC VARIABLES***************
extern LTDC_HandleTypeDef hltdc_discovery;
//static DMA2D_HandleTypeDef hdma2d;
extern DSI_HandleTypeDef hdsi_discovery;
DSI_VidCfgTypeDef hdsivideo_handle;
DSI_PLLInitTypeDef dsiPllInit;
//static RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
static uint32_t *my_fb = (uint32_t*)LAYER0_ADDRESS;
static DMA2D_HandleTypeDef hdma2d_discovery;
// ************ GLOBAL FUNCTION *************
// ********* initialize the display ***********
void tft_init(void) {
/* Deactivate speculative/cache access to first FMC Bank to save FMC bandwidth */
FMC_Bank1_R->BTCR[0] = 0x000030D2;
BSP_PSRAM_Init();
BSP_LCD_Init();
BSP_LCD_SelectLayer(0);
/* Send Display on DCS command to display */
HAL_DSI_ShortWrite(&hdsi_discovery,
0,
DSI_DCS_SHORT_PKT_WRITE_P0,
DSI_SET_DISPLAY_ON,
0x0);
BSP_LCD_Refresh();
static lv_disp_buf_t disp_buf;
static lv_color_t buf1[390 * 10];
// static lv_color_t buf2[390 * 10];
lv_disp_buf_init(&disp_buf, buf1, NULL, LV_HOR_RES_MAX * 10);
lv_disp_drv_t disp_drv; /*A variable to hold the drivers. Can be local variable*/
lv_disp_drv_init(&disp_drv); /*Basic initialization*/
disp_drv.buffer = &disp_buf; /*Set an initialized buffer*/
disp_drv.flush_cb = my_flush_cb;
//lv_disp_t * disp;/*Set a flush callback to draw to the display*/
lv_disp_drv_register(&disp_drv); /*Register the driver and save the created display objects*/
}
static void my_flush_cb(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p) {
CopyBuffer((uint32_t*) color_p, my_fb, area->x1, area->y1, lv_area_get_width(area), lv_area_get_height(area));
BSP_LCD_Refresh();
lv_disp_flush_ready(drv);
}
/**
* @brief Copy an input RGB888 buffer to output RGB888 with output offset
* @param pSrc: Pointer to source buffer
* @param pDst: Output color
* @param x: Start x position
* @param y: Start y position
* @param xsize: width
* @param ysize: height
* @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 * 768 + x) * 4;
uint32_t source = (uint32_t)pSrc;
hdma2d_discovery.Instance = DMA2D;
/*##-1- Configure the DMA2D Mode, Color Mode and output offset #############*/
hdma2d_discovery.Init.Mode = DMA2D_M2M;
hdma2d_discovery.Init.ColorMode = DMA2D_OUTPUT_ARGB8888;
hdma2d_discovery.Init.OutputOffset = 1024 - xsize;
hdma2d_discovery.Init.AlphaInverted = DMA2D_REGULAR_ALPHA; /* No Output Alpha Inversion */
hdma2d_discovery.Init.RedBlueSwap = DMA2D_RB_REGULAR; /* No Output Red & Blue swap */
hdma2d_discovery.Init.BytesSwap = DMA2D_BYTES_REGULAR; /* Regular output byte order */
hdma2d_discovery.Init.LineOffsetMode = DMA2D_LOM_PIXELS; /* Pixel mode */
/*##-2- Foreground Configuration ###########################################*/
hdma2d_discovery.LayerCfg[1].InputColorMode = DMA2D_INPUT_ARGB8888;
hdma2d_discovery.LayerCfg[1].InputOffset = 0;
hdma2d_discovery.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
hdma2d_discovery.LayerCfg[1].InputAlpha = 0xFF; /* Not used */
hdma2d_discovery.LayerCfg[1].RedBlueSwap = DMA2D_RB_SWAP; //DMA2D_RB_REGULAR; /* No ForeGround Red/Blue swap */
hdma2d_discovery.LayerCfg[1].AlphaInverted = DMA2D_REGULAR_ALPHA; /* No ForeGround Alpha inversion */
/* DMA2D Initialization */
if(HAL_DMA2D_Init(&hdma2d_discovery) == HAL_OK)
{
if(HAL_DMA2D_ConfigLayer(&hdma2d_discovery, 1) == HAL_OK)
{
if (HAL_DMA2D_Start(&hdma2d_discovery, source, destination, xsize, ysize) == HAL_OK)
{
/* Polling For DMA transfer */
HAL_DMA2D_PollForTransfer(&hdma2d_discovery, 10);
}
}
}
}
/*You code here*/
Screenshot and/or video
2020-02-12.png
Thank you, Huy.