若省略大括号,则只有一条语句(以分号结尾)成为执行语句。 if (x > 120) digitalWrite(LEDpin, HIGH); if (x > 120) digitalWrite(LEDpin, HIGH); if (x > 120){ digitalWrite(LEDpin, HIGH); } if (x > 120){ digitalWrite(LEDpin1, HIGH); digitalWrite(LEDpin2, HIGH); } // 以上所有书写方...
int ledPin = 13; void setup() { pinMode(ledPin, OUTPUT); } void loop() { digitalWrite(ledPin, HIGH); delay(1000); digitalWrite(ledPin, LOW); delay(1000); } 将文件另存为blink_test。 单击复选框图标以编译草图。 如果出现任何错误,请确保您输入的代码是正确的。请记住,与 Python 不同,...
if(digitalRead(buttonPin)HIGH) serialWrite(‘H’); else serialWrite(‘L’); delay(1000); }2 2.1 if 二、结构控制 if(条件判断语句)和、!=、<、>(比较运算符) if 语句与比较运算符一起用于检测某个条件是否达成,如某输入值是否在特定值之上 等。if 语句的语法是: if(someVariable>50) { // 执...
设置波特率为 9600pinMode(pin_test,OUTPUT);// 初始化引脚}voidloop(){digitalWrite(pin_test,HIGH);// 输出高电平 HIGHdelay(1000);// 延时 1 秒printSerial();// 调用串口打印函数digitalWrite(pin_test,LOW);// 输出低电平 LOWdelay(1000);// 等待 1 秒printSerial();// 调用串口打印函数}/* 串口...
[intLedNo - 1], HIGH); } // LED Off void ROBOT::LEDOff(int intLedNo) { digitalWrite(garyLED[intLedNo - 1], LOW); } // Motor Related functions // Move a Single Motor void ROBOT::Move(int intMotorNo, int intDir, int intSpeed) { gaM[intMotorNo - 1].Move(intMotorNo, ...
if(variable == true) { doSomething(); } else { doSomethingElse(); } HIGH/LOW These define the voltage level on a digital pin, either 5V or 0V. These make your code more readable: digitalWrite(13, HIGH); INPUT/OUTPUT These are constants used for setting pins that can be used either...
The ‘digitalRead’ function returns that HIGH or LOW value we’re looking for, which means that you can simply assign that value to a variable of theintegerdatatype. The first step to reading an Arduino button state is to choose which pin we will connect the button to. For this example...
boolean val = false ; // declaration of variable with type boolean and initialize it with false boolean state = true ; // declaration of variable with type boolean and initialize it with false 1. 2. Char 一种数据类型,占用一个字节的内存,存储一个字符值。字符文字用单引号写成:‘A’,对于...
int sensorValue; // an integer variable to store the potentiometer reading void setup() { // this function runs once when the sketch starts up pinMode (ledPin, OUTPUT); // initialize serial communication : Serial.begin(9600); } void loop() { // this loop runs repeatedly after setup()...
Visual Designer provides a large and growing number of shields and breakout boards in the Peripheral Gallery which can be controlled at a very high level via flowchart methods. However, there is nothing to prevent a user from creating their own electronics from scratch, using the schematic as a...