int n = 0; n = digitalRead(4) if(n == 0)
时间: 2024-05-19 13:11:47 浏览: 10
This code snippet is written in the Arduino programming language.
It initializes an integer variable `n` to 0 and then reads the digital input value from pin 4 using the `digitalRead()` function. The value of the input is stored in `n`.
After that, it checks if the value of `n` is equal to 0 using an `if` statement. If the value of `n` is indeed 0, then the code inside the `if` block will be executed. If the value of `n` is not 0, then the code inside the `if` block will be skipped.
相关问题
val= digitalRead(sensorpin);
As an AI language model, I do not have the context to provide a specific answer. However, I can provide some general information on this line of code.
The line of code "val= digitalRead(sensorpin);" is commonly used in Arduino programming. It reads the digital value from a specific pin and stores it in the variable "val". The "sensorpin" variable is the pin number on the Arduino board where the sensor is connected.
The digitalRead() function returns either HIGH or LOW, depending on the voltage level of the pin. If the voltage level is above a certain threshold, the function returns HIGH, otherwise, it returns LOW.
Overall, this line of code is used to read the input from a sensor connected to an Arduino board and store it in a variable for further processing or decision-making.
arduino int buttonState = digitalRead(2) 並將buttonState的值输出到串口监视器
好的,你可以使用以下代码将buttonState的值输出到串口监视器上:
```arduino
void setup() {
// 初始化串口通信
Serial.begin(9600);
// 设置数字引脚2为输入模式
pinMode(2, INPUT);
}
void loop() {
// 读取数字引脚2的输入状态
int buttonState = digitalRead(2);
// 将buttonState的值输出到串口监视器
Serial.println(buttonState);
// 延时一段时间
delay(100);
}
```
在代码中,我们在setup()函数中初始化了串口通信,并设置数字引脚2为输入模式。在loop()函数中,我们使用digitalRead()函数读取数字引脚2的输入状态,并将值赋给buttonState变量。然后,我们使用Serial.println()将buttonState的值输出到串口监视器上。最后,我们使用delay()函数延时100毫秒,以免输出太快。上传代码到Arduino板子上后,打开串口监视器,你就可以看到buttonState的值了。
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