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StefanWxx

strtok_r Problem

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Hi,
a simple program and also a simple problem, but I can not find a solution.
someone has a tip for me?


char text[] = "Value1, 1000, Value2,100,Value3,1.414,end";
void setup()
{
  
  Serial.begin(9600);
  
}

void loop(){
  
  char *p = text;
  char *str;
  
  
while ((str = strtok_r(p, ",", &p)) != NULL) // delimiter is comma
 {   Serial.println(str);
 delay(500);
 }


}

The output ist not as expected:

 

Value1

 1000
 Value2
100
Value3
1.414
end
Value1
Value1
Value1
Value1
Value1
Value1
Value1
.
.
.
.
.
 
 
I want this:
 
Value1
 1000
 Value2
100
Value3
1.414
end
Value1
 1000
 Value2
100
Value3
1.414
end
Value1
 1000
 Value2
100
Value3
1.414
end
.
.
.
 

 

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char *strtok_r(char *str, const char *delim, char **saveptr);

On the first call to strtok_r(), str should point to the string to be parsed, and the value of saveptr is ignored. In subsequent calls, str should be NULL, and saveptr should be unchanged since the previous call.

  char *p = text;
  char *q;
  char *str;

  while ((str = strtok_r(p, ",", &q)) != NULL) // delimiter is comma
  {
    p = NULL;
    Serial.println(str);
    delay(500);
  }

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