LVGL移植

初始化需要

lv_init();
lv_port_disp_init();        // 显示器初始化
lv_port_indev_init();       // 输入设备初始化（如果没有实现就注释掉）
lv_port_fs_init();          // 文件系统设备初始化（如果没有实现就注释掉）

修改lvgl/src/examples/porting下接口

显示接口

#include "lv_port_disp.h"
#include "lvgl/lvgl.h"
#include "lcd.h"
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);
#define MY_DISP_HOR_RES (320)
void lv_port_disp_init(void)
{
    /*-------------------------
     * Initialize your display
     * -----------------------*/
    disp_init();
    static lv_disp_draw_buf_t draw_buf_dsc_1;
    static lv_color_t buf_1[MY_DISP_HOR_RES * 10];                          /*A buffer for 10 rows*/
    lv_disp_draw_buf_init(&draw_buf_dsc_1, buf_1, NULL, MY_DISP_HOR_RES * 10);   /*Initialize the display buffer*/
    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 = 320;
    disp_drv.ver_res = 480;

    /*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_1;
    lv_disp_drv_register(&disp_drv);
}
static void disp_init(void)
{
    /*You code here*/
    LCD_Init();
}
static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
{
    /*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/

    int32_t x;
    int32_t y;
    LCD_SetWindow(area->x1, area->y1, area->x2, area->y2);
    for(y = area->y1; y <= area->y2; y++) {
        for(x = area->x1; x <= area->x2; x++) {
            /*Put a pixel to the display. For example:*/
            /*put_px(x, y, *color_p)*/
            LCD_WRITE_DATA(*(uint16_t*)color_p);
            color_p++;
        }
    }
    // LCD_Draw(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);
}

输入设备

static void touchpad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
    static lv_coord_t last_x = 0;
    static lv_coord_t last_y = 0;

    /*Save the pressed coordinates and the state*/
        /*Save the pressed coordinates and the state*/
    if(!XPT2046_EXTI_Read()) 
    {
        touchpad_get_xy(&last_x, &last_y);
        data->state = LV_INDEV_STATE_PR;
        printf("x=%d,y=%d\r\n",last_x,last_y);
    } else 
    {
        data->state = LV_INDEV_STATE_REL;
    }

    /*Set the last pressed coordinates*/
    data->point.x = last_x;
    data->point.y = last_y;
}

/*Return true is the touchpad is pressed*/
static bool touchpad_is_pressed(void)
{
    /*Your code comes here*/

    return false;
}

/*Get the x and y coordinates if the touchpad is pressed*/
static void touchpad_get_xy(lv_coord_t * x, lv_coord_t * y)
{
    /*Your code comes here*/
    (*x) = 319-XPT2046_ReadAdc_Fliter(XPT2046_CHANNEL_Y)*320/4095;
    (*y) = 479-XPT2046_ReadAdc_Fliter(XPT2046_CHANNEL_X)*480/4095;//4095-
}

文件系统

心跳1~10，一般取5

lv_tick_inc( tick );
lv_task_handler();

lv_conf.h

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