Fehler beim kompilieren eines Ampelprogramms

Projects Programming
1

Hallo,

iam trying to write a program fore some trafficlights, so that people can cross the street.

i tryed to run it but it has issues compiling.

can anybodey help please.

grettings :smile:

#define FUSSGRUEN 5
#define FUSSROT 6

#define AUTOGRUEN 8
#define AUTOGELB 9
#define AUTOROT 10

#define TASTER 2

#define GRUEN 3
#define GELB 2
#define ROT 1

long Timer = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(FUSSGRUEN, OUTPUT);
  pinMode(FUSSROT, OUTPUT);
  pinMode(AUTOGRUEN, OUTPUT);
  pinMode(AUTOGELB, OUTPUT);
  pinMode(AUTOROT, OUTPUT);
  pinMode(TASTER, INPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
  while (TASTER = LOW)
  {
    Schalten(0, GRUEN);
    Schalten(1, ROT);
  }

  if (TASTER != 0)
  {
    Schalten(0, GELB);
    Timer = millis() + 2000;
    Schalten(0, ROT);
    Timer = millis() + 2000;
    Schalten(1, GRUEN);
    Timer = millis() + 6000;
    Schalten(1, ROT);
    Timer = millis() + 2000;
    Schalten(0, GELB);
    Timer = millis() + 2000;
    Schalten(0, GRUEN);
  }
}
void Schalten(byte Ampel, byte Farbe)
{

  byte pinGRUEN = 0; byte pinGELB = 0; byte pinROT = 0;


  if (Ampel == 0)
  {
    pinGRUEN = AUTOGRUEN;
    pinGELB = AUTOGELB;
    pinROT = AUTOROT;
  }

  if (Ampel == 1)
  {
    pinGRUEN = FUSSGRUEN;
    pinROT = FUSSROT;
    pinGELB = LOW;
  }

  switch (Farbe)
  {
    case ROT:
      digitalWrite(pinGRUEN, LOW);
      digitalWrite(pinGELB, LOW);
      digitalWrite(pinROT, HIGH);
      break;

    case GELB:
      digitalWrite(pinGRUEN, LOW);
      digitalWrite(pinGELB, HIGH);
      digitalWrite(pinROT, LOW);
      break;

    case GRUEN:
      digitalWrite(pinGRUEN, HIGH);
      digitalWrite(pinGELB, LOW);
      digitalWrite(pinROT, LOW);
      break;
  }
}

this is the error:

Arduino: 1.8.13 (Windows 10), Board: "Arduino Uno"

In file included from sketch\Ampel_selbstvesuch.ino.cpp:1:0:

C:\Users\Stefanie\Documents\Arduino\Ampel\Ampel_selbstvesuch\Ampel_selbstvesuch.ino: In function 'void loop()':

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:41:14: error: lvalue required as left operand of assignment

#define LOW 0x0

          ^

C:\Users\Stefanie\Documents\Arduino\Ampel\Ampel_selbstvesuch\Ampel_selbstvesuch.ino:30:19: note: in expansion of macro 'LOW'

while (TASTER = LOW)

               ^~~

exit status 1

Fehler beim Kompilieren für das Board Arduino Uno.

2

It should be
while(TASTER == LOW)

TASTER=LOW is an assignment but an assignment is not possible, because TASTER is a constant , defined as '2'

P.S. wenn Du schon den Thementitel auf deutsch schreibst, kannst Du auch gleich im deutschen Forumsteil posten.Hier versteht das ja kaum jemand.

3

Hallo Marco,
vielen Dank. Du hast Recht, das war der Fehler.

Mach ich nächstes Mal. Dachte so hat man evtl. mehr Reichweite.

Danke für die schnelle Antwort und Grüße.

4

Dann muss aber auch der Titel auf englisch sein.

5

Another advice: Even if it compiles now without error, I don't think that it does what you intend it to do. As it is now you compare two constants, what does not make much sense.
I think what you intend to do is
while( digitalRead(TASTER) == LOW)

6

Thats right, i changed it. Thanks again :smile:

void loop() {
  if (digitalRead(TASTER))
  {
    Schalten(0, GRUEN);
    Schalten(1, ROT);
  }

  else
  {
7

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