Arduino Uno上的"pin change"中断是通过PCINT(Pin Change Interrupt)来实现的。PCINT是Arduino Uno上的一个特殊功能,它允许在特定引脚状态变化时触发中断。 在Arduino Uno上,有三个可用的PCINT引脚组,分别是PCINT0、PCINT1和PCINT2。每个组包含多个引脚,可以通过设置相应的寄存器来启用或禁用中断。
int pin=2; //将中断引脚定义为 2 volatile int state=LOW; //确保 ISR 之间共享变量 //主程序已正确更新,将它们声明为 volatile。 void setup() { pinMode(13, OUTPUT); //将引脚 13 设置为输出 attachInterrupt(digitalPinToInterrupt(pin), blink, CHANGE); //当引脚更改值时,引脚 2 处的中断闪烁 I...
PinChangeInterrupt Library 1.2.9 PinChangeInterrupt library with a resource friendly implementation (API and LowLevel). PinChangeInterrupts are different than normal Interrupts. See detail below. Features: PinChangeInterrupt for a lot of pins Rising, Falling or Change detection for every pin separatel...
Hardware interrupts are also easier to use in the Arduino environment. You just call the function attachInterrupt and input the interrupt number and the function to call when it triggers. But up until recently, there wasn’t a good Pin Change Interrupt library and even now it isn’t included...
* CHANGE:每当输入状态从高到低或从低到高时触发。 * */ int_exit = digitalPinToInterrupt(pin) /*描述:通过数字引脚(pin)输出相应的中断向量。 *参数:pin:数字引脚号 * int_exit:返回值,结果为引脚所对应的中断向量 */ 1. 2. 3. 4. 5. ...
(inti=0;i<4;i++){pinMode(receiver_pins[i],INPUT_PULLUP);enableInterrupt(receiver_pins[i],pwmReceive,CHANGE);}//开启中断sei();}voidloop(){delay(500);Serial.print("---PWM---\n");for(inti=0;i<4;i++){Serial.print(receiver_input[i]);Serial.print("\t");}Serial.print("---...
pinMode(interruptPin, INPUT_PULLUP); attachInterrupt(digitalPinToInterrupt(interruptPin), blink, CHANGE);//设置触发中断的端口,中断后运行的程序和触发模式 } void loop() { digitalWrite(ledPin, state); } void blink()//改变LED的状态,如果是LOW,则改为HIGH,反之亦然 ...
pinMode(Hall_sensor, INPUT_PULLUP); //Hall sensor is input pin attachInterrupt(digitalPinToInterrupt(Hall_sensor), toggle, CHANGE); //Pin two is interrupt pin which will call toggle function } 当检测到中断时,将如上行所述调用切换函数。有许多中断参数,如切换、变化、上升、下降等,但在本教程中,...
1) interrupt:中断号,UNO只用0,1,即代表D2,D3口 2)function:调用中断函数,中断发生时调用的函数 3)mode:中断触发模式 放在void setup() 中 以下是中断模式及其解释: low是在按钮被按下的状态 change电平变化,是在按钮按下时或者按钮弹起时 rising是电平由低到高,按钮弹起的时候 ...
pinMode( pinInterrupt, INPUT);//设置管脚为输入 pinMode( pinLed, OUTPUT);//设置管脚为输入 digitalWrite(pinLed,HIGH);//蜂鸣器很奇怪反过来控制 关 attachInterrupt( digitalPinToInterrupt(pinInterrupt), onChange, CHANGE); /* LOW 当引脚为低电平时,触发中断 CHANGE 当引脚电平发生改变时,触发中断 RISING ...