Hello,
for my Project, I’m doing, I have to programm a car model to drive without help.
It looks like this at the moment (German comments, safe to ignore 
)
Also, Pin names are in german, but they should be clear
#include <Servo.h>
#define linksPin1 3
//Backbord-Motoren - Pin9 und Pin10 können keine PWM?
#define linksPin2 11
#define rechtsPin1 5
//Steuerbord-Motoren
#define rechtsPin2 6
#define echoPin 8
#define trigPin 4
int ultraschall()
{
digitalWrite(trigPin, LOW); //sicher LOW
delayMicroseconds(10);
digitalWrite(trigPin, HIGH);
delayMicroseconds(100);
digitalWrite(trigPin, LOW);
float entfernung = pulseIn(echoPin, HIGH) / 58.0;
// Serial.print("Entfernung: "); Serial.print(entfernung); Serial.println(" cm");
}
Servo myservo;
int entfernungen[3];
void setup() {
// Serial.begin(9600);
myservo.attach(2);
pinMode(linksPin1, OUTPUT);
pinMode(linksPin2, OUTPUT);
pinMode(rechtsPin1, OUTPUT);
pinMode(rechtsPin2, OUTPUT);
pinMode(trigPin, OUTPUT); //Signal mit Ultraschallsensor aussenden
pinMode(echoPin, INPUT); //Signal mit Ultraschallsensor empfangen
}
void loop() {
digitalWrite(linksPin1, HIGH);
digitalWrite(linksPin2, HIGH);
digitalWrite(rechtsPin1, HIGH);
digitalWrite(rechtsPin2, HIGH);
for (int i = 60 ; i < 101 ; i = i + 20) {
myservo.write(i);
ultraschall();
delay(2000);
}
if (ultraschall() <= 38) {
analogWrite(rechtsPin1, LOW);
analogWrite(rechtsPin2, LOW);
analogWrite(linksPin1, LOW);
analogWrite(linksPin2, LOW);
umgebung_scannen;
}
}
void umgebung_scannen() {
for (int g = 0 ; g < 3 ; g++) {
myservo.write(80 + g * 10);
delay(150);
entfernungen[g] = ultraschall();
// Richtung; Entfernung
}
myservo.write(90);
if (abs(entfernungen[0] - entfernungen[2]) <= 1) { //Wand detektiert
}
else if (entfernungen[0] - entfernungen[2] > 1) { //Hindernis links
fahrrechts(int Speed = 255, int Time = 1000);
geradeaus(int Time = 2000);
fahrlinks(int Speed = 255, Time = 1000);
}
else () { //Hindernis rechts
fahrlinks(int Speed = 255, int Time = 1000);
geradeaus(int Time = 2000);
fahrrechts(int Speed = 255, Time = 1000);
}
}
void fahrrechts(int Speed, int Time){
if (Time != 0) {
if (Speed < 0) {
Speed = -1 * Speed;
analogWrite(rechtsPin1, Speed);
analogWrite(rechtsPin2, LOW);
delay(Time);
analogWrite(rechtsPin1, LOW);
analogWrite(rechtsPin2, LOW);
}
else {
analogWrite(rechtsPin1, LOW);
analogWrite(rechtsPin2, Speed);
delay(Time);
analogWrite(rechtsPin1, LOW);
analogWrite(rechtsPin2, LOW);
}
}
}
void fahrlinks(int Speed, int Time){
if (Time != 0) {
if (Speed < 0) {
Speed = -1 * Speed;
analogWrite(linksPin1, Speed);
analogWrite(linksPin2, LOW);
delay(Time);
analogWrite(linksPin1, LOW);
analogWrite(linksPin2, LOW);
}
else {
analogWrite(linksPin1, LOW);
analogWrite(linksPin2, Speed);
delay(Time);
analogWrite(linksPin1, LOW);
analogWrite(linksPin2, LOW);
}
}
}
void geradeaus(int Time){
if (Time != 0) {
digitalWrite(linksPin1, HIGH);
digitalWrite(linksPin2, HIGH);
digitalWrite(rechtsPin1, HIGH);
digitalWrite(rechtsPin2, HIGH);
delay(Time);
digitalWrite(linksPin1, LOW);
digitalWrite(linksPin2, LOW);
digitalWrite(rechtsPin1, LOW);
digitalWrite(rechtsPin2, LOW);
}
}
void stopp(){
digitalWrite(linksPin1, LOW);
digitalWrite(linksPin2, LOW);
digitalWrite(rechtsPin1, LOW);
digitalWrite(rechtsPin2, LOW);
}
Now i got the error message:
“expected primary-expression before ‘int’”
almost everywhere.
Error Code is huge:
Arduino: 1.8.12 (Windows 10), Board: "Arduino Uno"
LG_Mobil:113:16: error: expected primary-expression before 'int'
fahrrechts(int Speed = 255, int Time = 1000);
^~~
LG_Mobil:113:33: error: expected primary-expression before 'int'
fahrrechts(int Speed = 255, int Time = 1000);
^~~
LG_Mobil:114:15: error: expected primary-expression before 'int'
geradeaus(int Time = 2000);
^~~
LG_Mobil:115:15: error: expected primary-expression before 'int'
fahrlinks(int Speed = 255, Time = 1000);
^~~
LG_Mobil:115:32: error: 'Time' was not declared in this scope
fahrlinks(int Speed = 255, Time = 1000);
^~~~
LG_Mobil:118:9: error: expected primary-expression before ')' token
else () { //Hindernis rechts
^
exit status 1
expected primary-expression before 'int'
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
I never had such a long Error Message.
Can you explain me, how to fix this (and maybe other mistakes, if you find some.)
~ColdRogue26
