Arduino C not going into loop?

Question

char* lastfeedbuffer[3];
void lastfeed_receive(){
  while(Serial.available() >= LASTFEED_LEN ){
    char c = Serial.read();
    if (c == LASTFEED_HEAD){
      for (int i = 0; i < LASTFEED_LEN - 1; i++){
        lastfeedbuffer[i] = Serial.read();
      } 
    }
  }
  Serial.println(lastfeedbuffer);
  if (lastfeedbuffer == "00"){
    Serial.println("asdf");
  }
}

I don't understand why the following code is not printing the asdf. the Serial.println(lastfeedbuffer) prints 00, which means it should go into the loop any ideas why it doesn't?

lastfeedbuffer and "00" are not of compatible types: the first is of type array of 3 pointer to char; the second is of type array of char. Increase the warning level of your compiler and MIND THE WARNINGS. — pmg
– pmg, Commented Apr 28, 2011 at 22:07

Erik · Accepted Answer · 2011-04-28 22:04:30Z

3

Use strcmp(lastfeedbuffer, "00") == 0 - What you're currently doing is to compare two unrelated pointers.

Also, I believe you have char lastfeedbuffer[3]; not char* lastfeedbuffer[3]; in your actual code?

answered Apr 28, 2011 at 22:04

Erik

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