Arduino编译错误"Error Compiling for board Arduino Nano“

Question

我使用的是Arduino Nano，带有NEMA17步进器的DRV8825驱动器，以及4个按钮来模拟稍后将使用的ACS712电流传感器。简而言之，每个按钮都连接到模拟引脚(A0，A1，A2，A3)，并且模拟端口被编码为特定的度数(0,45,225,270)，经过一些工作，我能够使代码按所需的方式运行。步进器响应按钮并采用最短路径(CW或CCW)进行下一次选择，而不考虑选择顺序。如果您选择同一按钮两次，它将保持在当前位置，因为它已经在那里了！由于这是一项正在进行的工作，我一次做一个更改，例如添加代码以将继电器的数字引脚写为高电平，并转换为部分代码的数组。这就是我在编译Arduino Nano板时遇到错误的地方。我将包含2个代码，一个正常工作，另一个给出编译错误。我希望我没有违反任何规则，并阅读了一些似乎不适用的结果。

在此处输入代码

                         //THIS ONE GIVE THE ABOVE ERROR//

  //same as 1.0 but names changed to na=new angle & CA=current angle // This one seem to work, had 
    change some code to get it to work in all examples. // Using buttons to simulate analog inputs 
    for now. // Adding led to represent vac relay on/off PIN 4

    // defines pins numbers const int stepPin = 3; const int dirPin = 2; const int enPin = 8; const 
    int vacPin = 4; //Just added this for vac

// Button asignments //const int b1 = A0; //const int b2 = A1; //const int b3 = A2; //const int b4 = A3;

const int PIN_COUNT = 4; int inputPins[PIN_COUNT] = {A0, A1, A2, A3}; int outputVals[4] = {0, 45, 225, 270};

int ca = 0; //currentAngle int na = 0; //angle int stepPerAngle = 5 / 9; // full step = 1.8 or could have used "*1.8" int numstep;

void setup() { Serial.begin(9600); for (int index = 0; index < 4; index++) // Sets the 3 pins as Outputs pinMode(stepPin, OUTPUT); pinMode(dirPin, OUTPUT); pinMode(enPin, OUTPUT); pinMode(vacPin, OUTPUT); //Just added this for vac

//set values for 2 outputs digitalWrite(enPin, LOW); digitalWrite(dirPin, HIGH); digitalWrite(vacPin, LOW); //just add this for vac

// set buttons as inputs, some of these will become inputs from ACS712's /* pinMode(A0, INPUT); pinMode(A1, INPUT); pinMode(A2, INPUT); pinMode(A3, INPUT); }*/

void loop(); int n; for (int index = 0; index < 4; index++)

/* int n;
  // Assign button degrees
  if      ( digitalRead(A0) == HIGH) {
   na = 0;
  }
  else if ( digitalRead(A1) == HIGH) {
   na = 45;
  }
  else if ( digitalRead(A2) == HIGH) {
   na = 225;
  }
  else if ( digitalRead(A3) == HIGH) {
   na = 270;
  }*/

//currentAngle=ca    new angle=na
// 1st SCENARIO if these to ARE the same nothing happens
//only if they ARE not equal then steps through to find a true statement to act ohn
//if (ca = na) {digitalWrite(vacPin, HIGH);}
if ( ca != na ) {
  //  Serial.println (ca);
  //2nd SCENARIO
  if (na - ca > 0 && na - ca <= 180)
  { digitalWrite(dirPin, HIGH);
    n = ((na - ca) * 5 / 9);
    numstep = n;
    ca = na;
  }

  //3rd SCENARIO
  else if (ca - na > 0 && ca - na > 180)
  { digitalWrite(dirPin, HIGH);
    n = ((na + 360 - ca) * 5 / 9);
    numstep = n;
    ca = na;
  }

  // 4th SCENARIO
  else if (na - ca < 0 && na - ca <= 180)
  { digitalWrite(dirPin, LOW);
    n = ((ca - na) * 5 / 9);
    numstep = n;
    ca = na; (ca);
  }

  //5th SCENARIO
  else if (na - ca > 0 && na - ca > 180)
  { digitalWrite(dirPin, LOW);
    n = ((ca + 360 - na) * 5 / 9);
    numstep = n;
    ca = na; (ca);
  }

  for (int x = 0; x < numstep; x++) {

    digitalWrite(stepPin, HIGH);
    delayMicroseconds(1000);  //speed
    digitalWrite(stepPin, LOW);
    delayMicroseconds(1000);
  }  //speed
  delay(500);
}
}
                     //THIS ONE COMPILES WITH NO ERRORS//
 //same as 1.0 but names changed to na=new angle & CA=current angle // This one seem to work, had change some code to get it to work in all examples. // Using buttons to simulate analog inputs for now. // Adding led to represent vac relay on/off PIN 4

// defines pins numbers const int stepPin = 3; const int dirPin = 2; const int enPin = 8; const int vacPin = 4; //Just added this for vac

// Button asignment //const int b1 = A0; //const int b2 = A1; //const int b3 = A2; //const int b4 = A3;

int ca = 0; //currentAngle int na = 0; //angle int stepPerAngle = 5 / 9; // full step = 1.8 or could have used "*1.8" int numstep;

void setup() { Serial.begin(9600);

// Sets the 3 pins as Outputs pinMode(stepPin, OUTPUT); pinMode(dirPin, OUTPUT); pinMode(enPin, OUTPUT); pinMode(vacPin, OUTPUT); //Just added this for vac

//set values for 2 outputs digitalWrite(enPin, LOW); digitalWrite(dirPin, HIGH); digitalWrite(vacPin, LOW); //just add this for vac

// set buttons as inputs, some of these will become inputs from ACS712's pinMode(A0, INPUT); pinMode(A1, INPUT); pinMode(A2, INPUT); pinMode(A3, INPUT); }

void loop() { int n; // Assign button degrees if ( digitalRead(A0) == HIGH) { na = 0; } else if ( digitalRead(A1) == HIGH) { na = 45; } else if ( digitalRead(A2) == HIGH) { na = 225; } else if ( digitalRead(A3) == HIGH) { na = 270; }

//currentAngle=ca new angle=na // 1st SCENARIO if these to ARE the same nothing happens //only if they ARE not equal then steps through to find a true statement to act ohn //if (ca = na) {digitalWrite(vacPin, HIGH);} if ( ca != na ) { // Serial.println (ca); //2nd SCENARIO if (na - ca > 0 && na - ca <= 180) { digitalWrite(dirPin, HIGH); n = ((na - ca) * 5 / 9); numstep = n; ca = na; }

//3rd SCENARIO
else if (ca - na > 0 && ca - na > 180)
{ digitalWrite(dirPin, HIGH);
  n = ((na + 360 - ca) * 5 / 9);
  numstep = n;
  ca = na;
}

// 4th SCENARIO
else if (na - ca < 0 && na - ca <= 180)
{ digitalWrite(dirPin, LOW);
  n = ((ca - na) * 5 / 9);
  numstep = n;
  ca = na; (ca);
}

//5th SCENARIO
else if (na - ca > 0 && na - ca > 180)
{ digitalWrite(dirPin, LOW);
  n = ((ca + 360 - na) * 5 / 9);
  numstep = n;
  ca = na; (ca);
}

for (int x = 0; x < numstep; x++) {

  digitalWrite(stepPin, HIGH);
  delayMicroseconds(1000);  //speed
  digitalWrite(stepPin, LOW);
  delayMicroseconds(1000);
}  //speed
delay(500);
} }

Answer 1

“编译主板Arduino Nano时出错”

只是错误消息的结尾。包含what is error信息的实际错误消息在此之上。

我不会在这里详细介绍，因为您的代码格式太差了，我不能简单地复制粘贴它。如果你需要别人的帮助，你至少可以用换行符来发布你的代码。注释和代码不能在同一行中。

我看到的第一件事是：

void loop(); int n; for (int index = 0; index < 4; index++)

如果您将运行正常的代码与未编译的代码进行比较，您会发现一些重要的差异。

例如，在需要{的地方有一个分号。

void loop () {
  // you code
}

现在向上滚动控制台，找出编译器在抱怨什么并修复它。如果省略变量名并搜索常见文本，则可以在线找到任何错误消息的解决方案。