0
所以我正在做一个项目。我的任务是创建一个包含三种模式的交通信号灯系统，我可以通过向串行监视器输入数字1,2或3来选择。一切都还好，直到我决定向面包板添加三个按钮，所以我也可以通过按钮选择任何模式。到目前为止，我一直无法让Arduino同时接受来自串行监视器和按钮的输入，我不知道我是否在正确的道路上，还是不想实现我的目标。我只需要一个小指导，请。这是我目前的代码：串行监视器和按钮输入
//----------------------- 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);
}
那是什么意外的'distanceSensor（0）; //在'if（Serial.available（）> 0）'和块'{...}'之间的'loop（）'函数的开始处使用//距离传感器函数？ –
没有调用你的'loop'函数的代码，所以你可能需要发布更多。但是，AFAICT，一旦你在'switch'语句中输入'case'，你就会有一个无限循环。 （例如'case'1'：'，while（true）'while'break'），对于每个case的while语句也是如此，所以你可能需要重构一些东西，所以你有_one_'while'和每个'case'只做一次迭代，即将循环移动到开关/外壳的外部 –
问题的解决方案==>状态机 –