使用DCMI驱动OV5640摄像头，拍摄的图像直接显示在液晶屏上，通过QR-Code库解二维码，串口发送数据。(Using DCMI to drive the OV5640 camera, the images taken are displayed directly on the LCD screen, and the data is sent through the QR-Code library to solve the two-dimensional code)