LVGL 7.8.1生成二维码例程

二维码生成文件资源下载

链接：qrgen下载地址 提取码：6n8x

将下载好的二维码生成文件加入到工程

加入路径到C/C++附加包含目录

使用canvas实现二维码绘制

void draw_qrcode(uint16_t x1,uint16_t y1,uint8_t *src)
 {

    #define CANVAS_WIDTH  390
    #define CANVAS_HEIGHT 390
     EncodeData(src);

     
     static lv_color_t* cbuf;
     cbuf = lv_mem_alloc(LV_CANVAS_BUF_SIZE_TRUE_COLOR(CANVAS_WIDTH, CANVAS_WIDTH));
     lv_obj_t* canvas = lv_canvas_create(lv_scr_act(), NULL);
     lv_obj_set_pos(canvas, 0, 0);
    
     
     lv_obj_set_size(canvas, CANVAS_WIDTH, CANVAS_WIDTH);
     lv_canvas_set_buffer(canvas, cbuf, CANVAS_WIDTH, CANVAS_WIDTH, LV_IMG_CF_TRUE_COLOR);
  
     lv_canvas_fill_bg(canvas, LV_COLOR_WHITE, LV_OPA_COVER);

     lv_draw_rect_dsc_t dsc;
     lv_draw_rect_dsc_init(&dsc);
     dsc.bg_color = LV_COLOR_BLACK;
     dsc.bg_opa = LV_OPA_COVER;

     uint16_t size_num = 360 / MAX_MODULESIZE;
   

     /*Create hole on the canvas*/
     uint32_t x;
     uint32_t y;
     for (y = 0; y