说明：  pl2302驱动1.用USB线连接学习板和电脑。随后会听到叮咚一声。并弹出一个对话框。 2.关闭该对话框。运行光盘中PL2303文件夹下 HL2303。按提示进行操作即可 3.安装成功后会在设备管理器 COM口选项中看到连接的COM口是多少 4.打开STC_ISP软件 选择芯片型号，COM口 5.切记 点击下载后冷启动下学习板。即关闭电源，在重新打开下
(1. use the USB line to connect the learning board and the computer. Will then hear a loud buzz. And a dialog box is popped out. 2. close the dialog box. Run the HL2303 in the PL2303 folder in the CD-ROM. Operate on prompt When the 3. installation is successful, you will see how much of the COM port is connected to the device manager COM port option 4. open STC_ISP software selection chip model, COM port 5. remember to click to download the learning board after the cold start. That is, turn off the power and reopen it)