828F/applications/lvgl/lv_port_disp.c

/**
 * @file lv_port_disp_templ.c
 *
 */

/*Copy this file as "lv_port_disp.c" and set this value to "1" to enable content*/
#if 1

/*********************
 *      INCLUDES
 *********************/
#include "lv_port_disp.h"
#include "ltdc.h"
#include "lcd.h"
#include <stdbool.h>

/*********************
 *      DEFINES
 *********************/
#ifndef MY_DISP_HOR_RES
    #warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen width, default value 320 is used for now.
    #define MY_DISP_HOR_RES    1024
#endif

#ifndef MY_DISP_VER_RES
    #warning Please define or replace the macro MY_DISP_HOR_RES with the actual screen height, default value 240 is used for now.
    #define MY_DISP_VER_RES    600
#endif

/**********************
 *      TYPEDEFS
 **********************/
#define DBG_TAG    "LVGLd"
#define DBG_LVL    DBG_INFO
#include <rtdbg.h>
/**********************
 *  STATIC PROTOTYPES
 **********************/
static void disp_init(void);

static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p);
//static void gpu_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
//        const lv_area_t * fill_area, lv_color_t color);

/**********************
 *  STATIC VARIABLES
 **********************/

/**********************
 *      MACROS
 **********************/
static lv_disp_draw_buf_t draw_buf_dsc_1;
static lv_disp_draw_buf_t draw_buf_dsc_2;
static lv_disp_draw_buf_t draw_buf_dsc_3;

static lv_color_t *buf_1 = RT_NULL;
static lv_color_t *buf_2_1 = RT_NULL;
static lv_color_t *buf_2_2 = RT_NULL;
static lv_color_t *buf_3_1 = RT_NULL;
static lv_color_t *buf_3_2 = RT_NULL;
/**********************
 *   GLOBAL FUNCTIONS
 **********************/
extern struct rt_memheap sdram_heap; //
void lv_port_disp_init(void)
{
    /*-------------------------
     * Initialize your display
     * -----------------------*/
    disp_init();

    /*-----------------------------
     * Create a buffer for drawing
     *----------------------------*/

    /**
     * LVGL requires a buffer where it internally draws the widgets.
     * Later this buffer will passed to your display driver's `flush_cb` to copy its content to your display.
     * The buffer has to be greater than 1 display row
     *
     * There are 3 buffering configurations:
     * 1. Create ONE buffer:
     *      LVGL will draw the display's content here and writes it to your display
     *
     * 2. Create TWO buffer:
     *      LVGL will draw the display's content to a buffer and writes it your display.
     *      You should use DMA to write the buffer's content to the display.
     *      It will enable LVGL to draw the next part of the screen to the other buffer while
     *      the data is being sent form the first buffer. It makes rendering and flushing parallel.
     *
     * 3. Double buffering
     *      Set 2 screens sized buffers and set disp_drv.full_refresh = 1.
     *      This way LVGL will always provide the whole rendered screen in `flush_cb`
     *      and you only need to change the frame buffer's address.
     */

    /* Example for 1) */
    //static lv_disp_draw_buf_t draw_buf_dsc_1 __attribute__((aligned(8)));
    //static lv_color_t *buf_1 __attribute__((aligned(8))) = RT_NULL;
    //static lv_color_t buf_1[MY_DISP_HOR_RES * 10] __attribute__((section(".sdram")));                          /*A buffer for 10 rows*/
    //buf_1 = (lv_color_t *)rt_memheap_alloc(&sdram_heap, sizeof(lv_color_t) * MY_DISP_HOR_RES * 10);

    //lv_disp_draw_buf_init(&draw_buf_dsc_1, buf_1, NULL, MY_DISP_HOR_RES * 10);   /*Initialize the display buffer*/

    /* Example for 2) */
    //static lv_disp_draw_buf_t draw_buf_dsc_2 __attribute__((aligned(8)));
    //static lv_color_t *buf_2_1 __attribute__((aligned(8)))= RT_NULL;
    //static lv_color_t *buf_2_2 __attribute__((aligned(8)))= RT_NULL;
    //static lv_color_t buf_2_1[MY_DISP_HOR_RES * 10] __attribute__((section(".sdram")));                        /*A buffer for 10 rows*/
    //static lv_color_t buf_2_2[MY_DISP_HOR_RES * 10] __attribute__((section(".sdram")));                        /*An other buffer for 10 rows*/
    //buf_2_1 = (lv_color_t *)rt_memheap_alloc(&sdram_heap, sizeof(lv_color_t) * MY_DISP_HOR_RES * 10);
    //buf_2_2 = (lv_color_t *)rt_memheap_alloc(&sdram_heap, sizeof(lv_color_t) * MY_DISP_HOR_RES * 10);

    //lv_disp_draw_buf_init(&draw_buf_dsc_2, buf_2_1, buf_2_2, MY_DISP_HOR_RES * 10);   /*Initialize the display buffer*/

    /* Example for 3) also set disp_drv.full_refresh = 1 below*/
    //static lv_disp_draw_buf_t draw_buf_dsc_3 __attribute__((aligned(8)));
    //static lv_color_t *buf_3_1 __attribute__((aligned(8)))= RT_NULL;
    //static lv_color_t *buf_3_2 __attribute__((aligned(8)))= RT_NULL;
    //static lv_color_t buf_3_1[MY_DISP_HOR_RES * MY_DISP_VER_RES] __attribute__((section(".sdram")));            /*A screen sized buffer*/
    //static lv_color_t buf_3_2[MY_DISP_HOR_RES * MY_DISP_VER_RES] __attribute__((section(".sdram")));            /*Another screen sized buffer*/
    //buf_3_1 = (lv_color_t *)rt_memheap_alloc(&sdram_heap, sizeof(lv_color_t) * MY_DISP_VER_RES * 10);
    //buf_3_2 = (lv_color_t *)rt_memheap_alloc(&sdram_heap, sizeof(lv_color_t) * MY_DISP_VER_RES * 10);

    //lv_disp_draw_buf_init(&draw_buf_dsc_3, buf_3_1, buf_3_2, MY_DISP_HOR_RES * MY_DISP_VER_RES    );   /*Initialize the display buffer*/




    // 使用对齐分配函数
    buf_1 = (lv_color_t *)rt_memheap_alloc_align(&sdram_heap,
                                                sizeof(lv_color_t) * MY_DISP_HOR_RES * 10,
                                                4);  // ← 关键：对齐到 4 字节

    buf_2_1 = (lv_color_t *)rt_memheap_alloc_align(&sdram_heap,
                                                  sizeof(lv_color_t) * MY_DISP_HOR_RES * 10,
                                                  4);
    buf_2_2 = (lv_color_t *)rt_memheap_alloc_align(&sdram_heap,
                                                  sizeof(lv_color_t) * MY_DISP_HOR_RES * 10,
                                                  4);

    buf_3_1 = (lv_color_t *)rt_memheap_alloc_align(&sdram_heap,
                                                  sizeof(lv_color_t) * MY_DISP_HOR_RES * MY_DISP_VER_RES,
                                                  4);
    buf_3_2 = (lv_color_t *)rt_memheap_alloc_align(&sdram_heap,
                                                  sizeof(lv_color_t) * MY_DISP_HOR_RES * MY_DISP_VER_RES,
                                                  4);

    if (!buf_1 || !buf_2_1 || !buf_2_2 || !buf_3_1 || !buf_3_2) {
        LOG_E("Failed to alloc aligned draw buffers");
    }

    // 初始化 draw buffer
    lv_disp_draw_buf_init(&draw_buf_dsc_1, buf_1, NULL, MY_DISP_HOR_RES * 10);
    lv_disp_draw_buf_init(&draw_buf_dsc_2, buf_2_1, buf_2_2, MY_DISP_HOR_RES * 10);
    lv_disp_draw_buf_init(&draw_buf_dsc_3, buf_3_1, buf_3_2, MY_DISP_HOR_RES * MY_DISP_VER_RES);
    /*-----------------------------------
     * Register the display in LVGL
     *----------------------------------*/

    static lv_disp_drv_t disp_drv;                         /*Descriptor of a display driver*/
    lv_disp_drv_init(&disp_drv);                    /*Basic initialization*/

    /*Set up the functions to access to your display*/

    /*Set the resolution of the display*/
    disp_drv.hor_res = MY_DISP_HOR_RES;
    disp_drv.ver_res = MY_DISP_VER_RES;

    /*Used to copy the buffer's content to the display*/
    disp_drv.flush_cb = disp_flush;

    /*Set a display buffer*/
    disp_drv.draw_buf = &draw_buf_dsc_2;

    /*Required for Example 3)*/
    //disp_drv.full_refresh = 1;

    /* Fill a memory array with a color if you have GPU.
     * Note that, in lv_conf.h you can enable GPUs that has built-in support in LVGL.
     * But if you have a different GPU you can use with this callback.*/
    //disp_drv.gpu_fill_cb = gpu_fill;

    /*Finally register the driver*/
    lv_disp_drv_register(&disp_drv);
}

/**********************
 *   STATIC FUNCTIONS
 **********************/

/*Initialize your display and the required peripherals.*/
static void disp_init(void)
{
    /*You code here*/
}

volatile bool disp_flush_enabled = true;

/* Enable updating the screen (the flushing process) when disp_flush() is called by LVGL
 */
void disp_enable_update(void)
{
    disp_flush_enabled = true;
}

/* Disable updating the screen (the flushing process) when disp_flush() is called by LVGL
 */
void disp_disable_update(void)
{
    disp_flush_enabled = false;
}

/*Flush the content of the internal buffer the specific area on the display
 *You can use DMA or any hardware acceleration to do this operation in the background but
 *'lv_disp_flush_ready()' has to be called when finished.*/
static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
{
   // if(disp_flush_enabled){
   //     ltdc_color_fill(area->x1,area->y1,area->x2,area->y2,(uint16_t*)color_p);
   // }

    if(!RGB_DIR)   /*竖屏*/
    {
        int32_t x;
        int32_t y;
        for(y = area->y1; y <= area->y2; y++)
        {
            for(x = area->x1; x <= area->x2; x++)
            {
                #if   LTDC_PIXFORMAT == LTDC_PIXFORMAT_ARGB8888
                ltdc_draw_point(x, y, *(uint32_t *)(uint32_t*)color_p);
                #elif LTDC_PIXFORMAT_RGB565
                ltdc_draw_point(x, y, *(uint16_t *)(uint32_t*)color_p);
                #endif
                color_p++;
            }
        }
    }
    else   /*横屏*/
    {
        ltdc_color_fill(area->x1,area->y1,area->x2,area->y2,(uint16_t*)color_p);
    }
    /*IMPORTANT!!!
     *Inform the graphics library that you are ready with the flushing*/
    lv_disp_flush_ready(disp_drv);
}


/*OPTIONAL: GPU INTERFACE*/

/*If your MCU has hardware accelerator (GPU) then you can use it to fill a memory with a color*/
//static void gpu_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
//                    const lv_area_t * fill_area, lv_color_t color)
//{
//    /*It's an example code which should be done by your GPU*/
//    int32_t x, y;
//    dest_buf += dest_width * fill_area->y1; /*Go to the first line*/
//
//    for(y = fill_area->y1; y <= fill_area->y2; y++) {
//        for(x = fill_area->x1; x <= fill_area->x2; x++) {
//            dest_buf[x] = color;
//        }
//        dest_buf+=dest_width;    /*Go to the next line*/
//    }
//}


#else /*Enable this file at the top*/

/*This dummy typedef exists purely to silence -Wpedantic.*/
typedef int keep_pedantic_happy;
#endif