arduino ibox项目实战39－IfStatementConditional实验 - 九鼎创展论坛

打开arduino的IDE开发工具，依次点击文件->示例-> 05.Control->IfStatementConditional，IfStatementConditional的示例程序将会被打开，其源码如下：

// These constants won't change:
const int analogPin = A0; // pin that the sensor is attached to
const int ledPin = IO0; // pin that the LED is attached to
const int threshold = 1000; // an arbitrary threshold level that's in the range of the analog input
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize serial communications:
Serial.begin(9600);
}
void loop() {
// read the value of the potentiometer:
int analogValue = analogRead(analogPin);
// if the analog value is high enough, turn on the LED:
if (analogValue > threshold) {
digitalWrite(ledPin, HIGH);
}
else {
digitalWrite(ledPin, LOW);
}
// print the analog value:
Serial.println(analogValue);
delay(10); // delay in between reads for stability
}

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