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所以我正在做一個項目。我的任務是創建一個包含三種模式的交通信號燈系統，我可以通過向串行監視器輸入數字1,2或3來選擇。一切都還好，直到我決定向麪包板添加三個按鈕，所以我也可以通過按鈕選擇任何模式。到目前爲止，我一直無法讓Arduino同時接受來自串行監視器和按鈕的輸入，我不知道我是否在正確的道路上，還是不想實現我的目標。我只需要一個小指導，請。這是我目前的代碼：串行監視器和按鈕輸入
//----------------------- Variables
#define ECHOPIN 3
#define TRIGPIN 2
char inVal;
String inString = "";
const int red_led = 11;
const int yellow_led = 12;
const int green_led = 13;
const int on_delay= 2000, off_delay= 1000; //led delays
const int min_distance = 10; // Distance sensor min distance
const int The_buzzer = 4;
float real_distance; // Distance obtained from function
int ldrPin = A0; // LDR pin
unsigned int sensorValue = 0;
float voltage;
float light_amount;
int brightness = 600; // amount of light treshhold
int button_one = 5;
String ButtonOne;
void setup() {
pinMode(red_led, OUTPUT);
pinMode(yellow_led, OUTPUT);
pinMode(green_led, OUTPUT);
pinMode(The_buzzer, OUTPUT);
Serial.begin(9600);
pinMode(ECHOPIN, INPUT);
pinMode(TRIGPIN, OUTPUT);
pinMode(button_one, INPUT);
}
void loop() {
if (Serial.available()>0)
distanceSensor(0); // distance sensor function
{
inVal=Serial.read();
switch((inVal) | (ButtonOne == "HIGH"))
{
case '1': // ------------------------- Regular Mode
while (true)
{
red_light();
yellow_light();
green_light();
yellow_light();
}
break;
case '2': // ------------------------ Pedestrian Mode
while (true)
{
real_distance = distanceSensor(0);
if (real_distance < min_distance)
{
for (int a= 0; a < 10; a++)
{
tone(The_buzzer,1000);
delay(1000);
noTone(The_buzzer);
delay(1000);
digitalWrite(yellow_led, HIGH);
delay(100);
digitalWrite(yellow_led,LOW);
}
}
real_distance = distanceSensor(0);
if (real_distance > min_distance)
{
red_light();
yellow_light();
green_light();
yellow_light();
}
}
break;
case '3': // --------------------------- NIGHT MODE
while (true)
{
light_amount = LDRSensor(0);
real_distance = distanceSensor(0);
if (light_amount > brightness)
{
red_light();
yellow_light();
green_light();
yellow_light();
red_light();
delay(100);
}
if (light_amount < brightness || real_distance < min_distance)
{
real_distance = distanceSensor(0); // distance sensor reading
if (real_distance > min_distance)
{
digitalWrite(green_led, LOW);
digitalWrite(red_led, HIGH);
}
if (real_distance < min_distance)
{
while(real_distance < min_distance && light_amount < brightness)
{ //maybe change this
digitalWrite(red_led, LOW);
digitalWrite(green_led, HIGH);
real_distance = distanceSensor(0);
}
digitalWrite(green_led, LOW);
}
}
}
break;
default:
standby_mode(); // blinks all leds until 1,2 or 3 is selected
}
}
}
//--------------------------------------- FUNCTIONS -----------------------
//----------------------------------- Red light function
void red_light()
{
digitalWrite(red_led, HIGH);
delay(on_delay);
digitalWrite(red_led,LOW);
}
//---------------------------------- Yellow light function
void yellow_light()
{
digitalWrite(yellow_led, HIGH);
delay(off_delay);
digitalWrite(yellow_led,LOW);
}
//--------------------------------- Green light function
void green_light()
{
digitalWrite(green_led, HIGH);
delay(on_delay);
digitalWrite(green_led,LOW);
}
//------------------------------ --- Distance sensor function
float distanceSensor(int x)
{
digitalWrite(TRIGPIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIGPIN,HIGH);
delayMicroseconds(10);
digitalWrite(TRIGPIN,LOW);
float distance = pulseIn(ECHOPIN, HIGH);
distance = distance/58;
Serial.print(distance);
Serial.println("cm");
delay(200);
float distance_reading = distance;
return distance_reading;
}
//------------------------------------- LDR sensor function
float LDRSensor(int h)
{
sensorValue = analogRead(ldrPin);
voltage = sensorValue * (5000.0/1024.0);
Serial.print("Sensor Output: ");
Serial.println(sensorValue);
Serial.print("Voltage (mv): ");
Serial.println(voltage);
Serial.println();
delay(5000);
return sensorValue;
}
//------------------------------------- Buzzer Function
void buzzer(unsigned char delayms)
{
analogWrite(The_buzzer, 20);
delay(delayms);
analogWrite(The_buzzer, 0);
delay(delayms);
}
// ------------------------------------- Standby Mode
void standby_mode()
{
for (int a= 10; a < 14; a++)
{
digitalWrite(a,HIGH);
}
delay(off_delay);
for (int b=10; b < 14; b++)
{
digitalWrite(b,LOW);
}
delay(off_delay);
}
那是什麼意外的'distanceSensor（0）; //在'if（Serial.available（）> 0）'和塊'{...}'之間的'loop（）'函數的開始處使用//距離傳感器函數？ –
沒有調用你的'loop'函數的代碼，所以你可能需要發佈更多。但是，AFAICT，一旦你在'switch'語句中輸入'case'，你就會有一個無限循環。 （例如'case'1'：'，while（true）'while'break'），對於每個case的while語句也是如此，所以你可能需要重構一些東西，所以你有_one_'while'和每個'case'只做一次迭代，即將循環移動到開關/外殼的外部 –
問題的解決方案==>狀態機 –