#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voidflush_cb(lv_disp_drv_t*disp_drv,constlv_area_t*area,lv_color_t*color_p){// 更新最后一次刷新的时间为当前时间last_flush_time=time(NULL);// 将图形数据发送到显示设备上// ...
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...
我们需要重点关注lv_port_disp_init显示接口初始化函数与disp_flush屏幕刷新两个函数。 其中,lv_port_disp_init函数里主要要选择一种写缓存的方式及设置显示分辨。我们选择第一种写缓存的方式,修改后的函数如: void lv_port_disp_init(void) { /*--- * Initialize your display * ---*/ disp_init(); /*...
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...
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...
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...
()# 将显示缓冲区对象赋值给驱动对象的draw_buf属性disp_drv.draw_buf=disp_buf1# 将LCD对象的刷新回调函数lcd_write赋值给驱动对象的flush_cb属性disp_drv.flush_cb=mipilcd.lcd_write# 此处基于实际的屏幕宽度来设置水平分辨率disp_drv.hor_res=480# 此处基于实际的屏幕高度来设置垂直分辨率disp_drv.ver_res=...
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*/ ...