在每次调用flush_cb时,我们更新last_flush_time的值为当前时间。同时,在需要判断最后一次刷新时间的地方,我们可以通过读取last_flush_time的值来获取最后一次刷新的时间。 下面是一个示例代码: #include"lvgl.h"#include// 全局变量,用于记录最后一次调用flush_cb的时间time_tlast_flush_time=0;// 刷新回调函数voi...
clean_dcache_cb用于清理与显示相关的任何缓存的回调。 样例 staticlv_disp_drv_tdisp_drv;//静态的一个显示驱动结构体lv_disp_drv_init(&disp_drv);//初始化结构体disp_drv.draw_buf=&disp_buf;//指向上一章显示缓存的指针disp_drv.flush_cb=my_flush_cb;//回调函数,将缓冲区的内容复制到显示器的特定...
当LVGL 渲染完,调用回调函数 example_lvgl_flush_cb 把数据写入 LCD //set the callback which can copy the rendered image to an area of the displaylv_display_set_flush_cb(display, example_lvgl_flush_cb); 回调函数的函数类型如下 typedefvoid(*lv_display_flush_cb_t)(lv_display_t * disp,const...
/* LVGL requires a buffer where it internally draws the widgets. * Later this buffer will passed your display drivers `flush_cb` to copy its content to your display. * The buffer has to be greater than 1 display row * * There are three buffering configurations: * 1. Create ONE buffer ...
flush_cb是一个回调函数,具体作用官方解释是把缓存写到屏幕上。具体怎么写,由用户自定义 /** MANDATORY: Write the internal buffer (draw_buf) to the display. 'lv_disp_flush_ready()' has to be * called when finished*/ 官方实现代码如下,本质就是把lvgl的像素画到实际屏幕上,注意最后一句,每次写完后...
LVGLrequires a buffer where it internally draws the widgets.*Laterthisbuffer will passed to your display driver's`flush_cb`to copy its content to your display.*The buffer has to be greater than1display row**There are3buffering configurations:*1.CreateONEbuffer:*LVGLwill draw the display's co...
disp_drv.flush_cb = fbdev_flush; disp_drv.hor_res = 480; disp_drv.ver_res = 800; lv_disp_drv_register(&disp_drv); evdev_init(); static lv_indev_drv_t indev_drv_1; lv_indev_drv_init(&indev_drv_1); indev_drv_1.type = LV_INDEV_TYPE_POINTER; ...
disp_drv.flush_cb = fbdev_flush; disp_drv.hor_res = 480; disp_drv.ver_res = 800; lv_disp_drv_register(&disp_drv); evdev_init(); static lv_indev_drv_t indev_drv_1; lv_indev_drv_init(&indev_drv_1); indev_drv_1.type = LV...
disp_drv.flush_cb = disp_flush; /*Set a display buffer*/ disp_drv.buffer =&draw_buf_dsc_1; #if LV_USE_GPU /*Optionally add functions to access the GPU. (Only in buffered mode, LV_VDB_SIZE != 0)*/ /*Blend two color array using opacity*/ ...
(&lv_disp_buf,lv_buf_1,lv_buf_2,DISP_BUF_SIZE);staticlv_disp_drv_t disp_drv;lv_disp_drv_init(&disp_drv);disp_drv.hor_res=WIDTH;disp_drv.ver_res=HEIGHT;disp_drv.draw_buf=&lv_disp_buf;// TODO Use acceleration structure for drawingdisp_drv.flush_cb=window_flush;lv_disp_drv_...