读串口数据的一个程序,只要当有数据向串口发数据来时,计算机就会自动将其数据写到一个特定的缓冲区,我们只要写程序去读那个特定的缓冲区就可以了.-Reading serial data, a procedure, as long as when there are data to serial data to FAT, the computer will automatically write its data to a specific buffer, we can write the proce