Question

我很难调试这段代码，我希望有人可以指出我犯了哪些错误。

我的串口输出是：

connected
GetData()
got data...
next stage...

我已经测试了一个简单的网络客户端，循环发送一个hello世界，它工作正常。每次尝试将值发送到client后此代码停止。我知道getData()导致了这个问题，但我找不到原因，或者如何最好地解决它。（代码转储道歉，我想彻底）

#include <LiquidCrystal.h>
#include <dht11.h>
#include <SPI.h>
#include <Ethernet.h>
dht11 DHT11;
#define DHT11PIN 8

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress server(192,168,1,100);
IPAddress ip(192,168,1,50);
EthernetClient client;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

const int trigPin = 6;
const int echoPinOne = 7;
const int echoPinTwo = 8;
const int echoPinThree = 9;
const int echoPinFour = 10;

void setup() { 
  lcd.begin(16, 2);
  Serial.begin(9600);
  delay(1000);

  //Network
 if (Ethernet.begin(mac) == 0) {
    Serial.println("DHCP FAIL");
    Ethernet.begin(mac, ip);
  }
  delay(1000);
  Serial.println("connecting...");
  lcd.setCursor(0, 0);
  lcd.print("connecting");
  connect();  
}

void connect(){ 
    if (client.connect(server, 8080)) {
      Serial.println("connected");
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("connected");

      client.println("hello server");
      client.println();
      delay(500);
      lcd.clear();
  } 
  else {
    Serial.println("connection failed");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Connection Failure");
  }
  delay(500);
}

void loop() {
   //network
  if(!client.available()){
    Serial.println("lost connection!-restart");
    lcd.println("Disconnection");
    client.stop();
    connect();
  }
  else {
    int inp[5];   
    getData(inp);
    Serial.println("next stage...");
    char *output = (char *) &inp[0];   
    client.println(output);
    client.println("first");    
    Serial.println("sent first...");
    //here repeats the same process for the other sensors - omitted for clear reading 
  }
   //end network
   delay(500);
}

void getData(int *inputBuf){  
  Serial.println("GetData()");
  long durationThree, inchesThree, cmThree = 0;
  long durationOne, inchesOne, cmOne = 0;
  long durationTwo, inchesTwo, cmTwo = 0;
  long durationFour, inchesFour, cmFour = 0;

  //SENSOR ONE
  pinMode(trigPin, OUTPUT);
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  pinMode(echoPinOne, INPUT);
  durationOne = pulseIn(echoPinOne, HIGH);

  delay(100);

  //SENSOR TWO
  pinMode(trigPin, OUTPUT);
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  pinMode(echoPinTwo, INPUT);
  durationTwo = pulseIn(echoPinTwo, HIGH);

  delay(100);

  //SENSOR THREE
  pinMode(trigPin, OUTPUT);
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  pinMode(echoPinThree, INPUT);
  durationThree = pulseIn(echoPinThree, HIGH);

  delay(100);

  //SENSOR FOUR
  pinMode(trigPin, OUTPUT);
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  pinMode(echoPinFour, INPUT);
  durationFour = pulseIn(echoPinFour, HIGH);

  //DISTANCE CALCULATION
  cmOne = microsecondsToCentimeters(durationOne);
  cmTwo = microsecondsToCentimeters(durationTwo);
  cmThree = microsecondsToCentimeters(durationThree);
  cmFour = microsecondsToCentimeters(durationFour);

  //Serial.println("sending...");
  //char *out = (char *) &cmOne;
  //Serial.println(out);
  //client.println(out);
  //Serial.println("sent!");      used this to test - same issue

  Serial.println("got data...");
  inputBuf[0] = cmOne;
  inputBuf[1] = cmTwo;
  inputBuf[2] = cmThree;
  inputBuf[3] = cmFour;

}

long microsecondsToCentimeters(long microseconds)
{
  return microseconds / 29 / 2;
}

Answer 1

我不知道println()是如何工作的，但假设它需要nul个终止的字节序列，所以你需要nul在此声明之后终止

int inp[5]

添加此

inp[4] = '\0';

或者你可以在这里添加

inputBuf[0] = cmOne;
inputBuf[1] = cmTwo;
inputBuf[2] = cmThree;
inputBuf[3] = cmFour;
inputBuf[4] = 0; // <--- here

C~Arduino：调用函数后停止

1 个答案: