设计一个Arduino的FSM十字路口红绿灯要求有turn NSred(),turn NS green(),turnNSyellow(),turnEWred(),turnEWgreen(),turnEWyellow(),和restratTimer(1000)等函数
时间: 2023-09-28 19:13:37 浏览: 40
好的,我可以帮你设计一个Arduino的FSM十字路口红绿灯。首先,我们需要定义一些全局变量,如下所示:
```
int currentState = 0;
unsigned long previousMillis = 0;
const long interval = 1000;
```
其中,`currentState`表示当前状态,`previousMillis`表示上一次计时的时间,`interval`表示每个状态的持续时间(以毫秒为单位)。
接下来,我们可以给每个状态分配一个数字值,并定义每个状态的行为。在这个例子中,我们需要六个状态,分别对应六种不同的交通灯情况。例如,当状态为 1 时,意味着南北方向的车道是绿灯,东西方向的车道是红灯。我们可以按照如下方式定义每个状态及其行为:
```
void turnNSred() {
digitalWrite(NSgreen, LOW);
digitalWrite(NSyellow, LOW);
digitalWrite(NSred, HIGH);
digitalWrite(EWgreen, HIGH);
digitalWrite(EWyellow, LOW);
digitalWrite(EWred, LOW);
}
void turnNSgreen() {
digitalWrite(NSgreen, HIGH);
digitalWrite(NSyellow, LOW);
digitalWrite(NSred, LOW);
digitalWrite(EWgreen, LOW);
digitalWrite(EWyellow, LOW);
digitalWrite(EWred, HIGH);
}
void turnNSyellow() {
digitalWrite(NSgreen, LOW);
digitalWrite(NSyellow, HIGH);
digitalWrite(NSred, LOW);
digitalWrite(EWgreen, LOW);
digitalWrite(EWyellow, LOW);
digitalWrite(EWred, HIGH);
}
void turnEWred() {
digitalWrite(NSgreen, HIGH);
digitalWrite(NSyellow, LOW);
digitalWrite(NSred, LOW);
digitalWrite(EWgreen, LOW);
digitalWrite(EWyellow, LOW);
digitalWrite(EWred, HIGH);
}
void turnEWgreen() {
digitalWrite(NSgreen, LOW);
digitalWrite(NSyellow, LOW);
digitalWrite(NSred, HIGH);
digitalWrite(EWgreen, HIGH);
digitalWrite(EWyellow, LOW);
digitalWrite(EWred, LOW);
}
void turnEWyellow() {
digitalWrite(NSgreen, LOW);
digitalWrite(NSyellow, LOW);
digitalWrite(NSred, HIGH);
digitalWrite(EWgreen, LOW);
digitalWrite(EWyellow, HIGH);
digitalWrite(EWred, LOW);
}
void restartTimer(int duration) {
previousMillis = millis();
}
```
最后,我们需要定义状态转换的条件和行为。在这个例子中,我们可以按照如下方式定义状态转换:
```
void loop() {
unsigned long currentMillis = millis();
switch(currentState) {
case 0:
if(currentMillis - previousMillis >= interval) {
currentState = 1;
turnNSgreen();
restartTimer(interval);
}
break;
case 1:
if(currentMillis - previousMillis >= interval) {
currentState = 2;
turnNSyellow();
restartTimer(interval);
}
break;
case 2:
if(currentMillis - previousMillis >= interval) {
currentState = 3;
turnNSred();
restartTimer(interval);
}
break;
case 3:
if(currentMillis - previousMillis >= interval) {
currentState = 4;
turnEWgreen();
restartTimer(interval);
}
break;
case 4:
if(currentMillis - previousMillis >= interval) {
currentState = 5;
turnEWyellow();
restartTimer(interval);
}
break;
case 5:
if(currentMillis - previousMillis >= interval) {
currentState = 0;
turnEWred();
restartTimer(interval);
}
break;
}
}
```
在这个例子中,当当前状态为 0 时,南北方向的绿灯持续一段时间后,变成黄灯,然后变成红灯;同时,东西方向的红灯持续一段时间后,变成绿灯,然后变成黄灯。这样,状态不断循环,模拟出了十字路口的交通灯控制系统。