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- 用定时器 2来改变小灯的状态,T2每发生一次中断小灯改变状态一次。1 个 LED灯定时开 关,1 个 LED灯常亮。 -2 using the timer to change the status of a small lamp, T2 interrupt occurs once for every little light to change the status again. 1 LED light timer switch, an LED lights lit.