C8051F120 watchdog 功能实现源程序-C8051F120 watchdog function of the realization of the source code

c8051f120单片机初始化和复位看门狗定时器并检查看门狗定时器重置例程，内带说明 -c8051f120 MCU initialization and reset the watchdog timer and check the watchdog timer reset routine, with a note inside