45 lines
1.7 KiB
C++
Executable File
45 lines
1.7 KiB
C++
Executable File
/*
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* 逻辑或布尔运算
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*
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* 本示例程序演示逻辑或布尔运算。通过本程序，Arduino将对引脚2和引脚8的电平状态
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* 进行逻辑或布尔运算，并根据运算结果点亮或熄灭引脚13上连接的LED。
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*
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* 电路：
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* 引脚2连接按键开关1，开关1另一端接地
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* 引脚8连接按键开关2，开关2另一端接地
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* 引脚13上安装有开发板内置LED
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*
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*
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* This example code is in the public domain
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* 太极创客
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* 2017-01-18
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* www.taichi-maker.com
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*/
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boolean pushButton1; // 创建布尔型变量用来存储按键开关1的电平状态
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boolean pushButton2; // 创建布尔型变量用来存储按键开关2的电平状态
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void setup() {
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pinMode(2, INPUT_PULLUP); //将引脚2设置为输入上拉模式
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pinMode(8, INPUT_PULLUP); //将引脚8设置为输入上拉模式
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pinMode(13, OUTPUT); //将引脚13设置为输出模式
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}
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void loop() {
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pushButton1 = digitalRead(2); //读取引脚2电平状态并将其赋值给布尔变量
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pushButton2 = digitalRead(8); //读取引脚8电平状态并将其赋值给布尔变量
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if (!pushButton1 || !pushButton2){ //根据逻辑或运算结果点亮或者熄灭LED
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digitalWrite(13, HIGH); //两个布尔变量数值任何一个为假（false）时点亮LED
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} else {
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digitalWrite(13, LOW); //否则熄灭LED
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}
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}
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/*
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* 逻辑或运算说明
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!pushButton1 = 1, !pushButton2 = 1 ---> !pushButton1 || !pushButton2 = 1
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!pushButton1 = 0, !pushButton2 = 1 ---> !pushButton1 || !pushButton2 = 1
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!pushButton1 = 1, !pushButton2 = 0 ---> !pushButton1 || !pushButton2 = 1
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!pushButton1 = 0, !pushButton2 = 0 ---> !pushButton1 || !pushButton2 = 0
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*/
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