看门狗，定时点灯 ：如果将程序烧写到FLASH运行，WDT复位后程序会重新开始；若使用RAM进行仿真调试， * WDT复位后JTAG口会断开。-Watchdog, timing the lights: If the procedures FLASH programmer to run, WDT reset will re-started after the procedure if the use of RAM simulation debugging,* WDT reset afte