用到了io和time，先设置IO的map方式，然后是引脚。接着死循环，交替的让18脚输出高低电平，中间是时间。 原理是很简单，通过快速的改变18脚的开关状态来工作，延迟时间用音调计算而来。 初始化的韩苏护创建一个check_var的成员变量，包含了一个bool的变量，未 ...
The Raspberry Pi has been very popular among hobbyists and educators ever since its launch in 2011. The Raspberry Pi is a credit-card-sized single-board computer with a Broadcom BCM 2835 SoC, 256MB to ...
The Raspberry Pi is a great machine to learn the ins and outs of blinking pins, but for doing anything that requires blinking pins fast, you’re better off going with a BeagleBone. This has been the ...
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