采用C语言编程，在JX44BOX教学实验箱进行看门狗定时器的实验。正常运行时数码管依次显示出0、1，2......F，程序异常时（没有正常喂狗时），将不能正常显示。-Using C language programming, in the JX44BOX teaching experiment box for the watchdog timer experiment. The normal operation of the digital tube display 0, 1, 2... F,