直接用手动产生单脉冲作为中断请求信号。 要求每按一次开关产生一次中断,在屏幕上 显示一次“TPCA Interrupt!”,中断10次后 程序退出-Directly by hand to produce a single pulse as an interrupt request signal. Each time you press the switch requires an interrupt is generated, show a　TPCA Interrupt!　On the screen, interrupted 10 times after the program exits