下面这个接口函数非常重要：
static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
{
disp_drv_p=disp_drv;
if(disp_flush_enabled) {
/*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/
int32_t x;
int32_t y;
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)*/
OLED_DrawPoint2(x,y,color_p->full);
color_p++;
}
}
}
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