/*Finally register the driver*/ lv_disp_drv_register(&disp_drv);
}
修改后 ```C 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; static lv_color_t buf_1[320 * 10]; /*A buffer for 10 rows*/ lv_disp_draw_buf_init(&draw_buf_dsc_1, buf_1, NULL, 320 * 10); /*Initialize the display buffer*/ /* Example for 2) */ // static lv_disp_draw_buf_t draw_buf_dsc_2; // static lv_color_t buf_2_1[MY_DISP_HOR_RES * 10]; /*A buffer for 10 rows*/ // static lv_color_t buf_2_2[MY_DISP_HOR_RES * 10]; /*An other buffer for 10 rows*/ // 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; // static lv_color_t buf_3_1[MY_DISP_HOR_RES * MY_DISP_VER_RES]; /*A screen sized buffer*/ // static lv_color_t buf_3_2[MY_DISP_HOR_RES * MY_DISP_VER_RES]; /*Another screen sized buffer*/ // lv_disp_draw_buf_init(&draw_buf_dsc_3, buf_3_1, buf_3_2, MY_DISP_VER_RES * LV_VER_RES_MAX); /*Initialize the display buffer*/ /*----------------------------------- * 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 = 320; //使用的屏幕尺寸（分辨率） disp_drv.ver_res = 240; /*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; /*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); }
放入自己的屏幕初始化配置
/*Initialize your display and the required peripherals.*/ static void disp_init(void) { /*You code here*/ ILI9341_LCD_Init(); }
放入自己的屏幕打点函数
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*/ ILI9341_Draw_Rec_LVGL(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); }
四、修改lv_port_indev_template.c/h
点击lv_port_indev_template.c/h文件，将
#if 0
修改为
#if 1
对内容进行裁剪，仅保留触摸部分，修改后的代码如下：
/** * @file lv_port_indev_templ.c * */ /*Copy this file as "lv_port_indev.c" and set this value to "1" to enable content*/ #if 1 /********************* * INCLUDES *********************/ #include "lv_port_indev_template.h" #include "../../lvgl.h" #include "XPT2046_touch.h" /********************* * DEFINES *********************/ /********************** * TYPEDEFS **********************/ extern strType_XPT2046_TouchPara strXPT2046_TouchPara; /********************** * STATIC PROTOTYPES **********************/ static void touchpad_init(void); static void touchpad_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data); static bool touchpad_is_pressed(void); static void touchpad_get_xy(lv_coord_t * x, lv_coord_t * y); /********************** * STATIC VARIABLES **********************/ lv_indev_t * indev_touchpad; /********************** * MACROS **********************/ /********************** * GLOBAL FUNCTIONS **********************/ void lv_port_indev_init(void) { static lv_indev_drv_t indev_drv; /*------------------ * Touchpad * -----------------*/ /*Initialize your touchpad if you have*/ touchpad_init(); /*Register a touchpad input device*/ lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_POINTER; indev_drv.read_cb = touchpad_read; indev_touchpad = lv_indev_drv_register(&indev_drv); } /********************** * STATIC FUNCTIONS **********************/ /*------------------ * Touchpad * -----------------*/ /*Initialize your touchpad*/ static void touchpad_init(void) { /*Your code comes here*/ XPT2046_Init(); } /*Will be called by the library to read the touchpad*/ 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*/ if(touchpad_is_pressed()) { touchpad_get_xy(&last_x, &last_y); data->state = LV_INDEV_STATE_PR; } 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*/ if(XPT2046_TouchDetect() == TOUCH_PRESSED) { return true; } else { 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) = XPT2046_GetPoint_X(); (*y) = XPT2046_GetPoint_Y(); } #else /*Enable this file at the top*/ /*This dummy typedef exists purely to silence -Wpedantic.*/ typedef int keep_pedantic_happy; #endif
