get value of one variable to another function (pointers?)

Projects Programming
1

To begin with, I have limited knowledge of coding so please dont use heavy programming terms because i get confused :confused:

Im basically trying to transfer the value of one variable to another variable in another function (using pointers maybe?). So in one function, i want to store the value of a variable into memory and then call on that memory in the main loop and assign it to another variable. how do i do this? i tried to return two variables in my function and read that its not possible. tried using pointers but im having trouble.

#include <Servo.h>
Servo index1;
int flexPin_1 = A1;   //read flex sensor
void setup() {
  Serial.begin(115200);
  index1.attach(9);      //finger mservo
}


void loop() {
  int finger1 = constrain_flex_hiLo(flexPin_1, 3,16);
  int finger1_servo = *p;
  Serial.print(finger1); Serial.print("     "); Serial.print(finger1_servo); index1.write(finger1_servo);
  Serial.println();
  delay(5);
}


int constrain_flex_hiLo(int flexPin, int lo, int hi){
 int finger = analogRead(flexPin);
 finger = constrain(finger, lo, hi);
 int fingerServo = map(finger, lo,hi, 0,180);
 int *p = &fingerServo;
 return finger;
}
3

The code that you wrote was pretty close. I think if you change it to pass the address of finger1_servo into constrain_flex_hiLo() and set the value correctly it will work. Try the following.

#include <Servo.h>
Servo index1;
int flexPin_1 = A1;   //read flex sensor
void setup() {
  Serial.begin(115200);
  index1.attach(9);      //finger mservo
}


void loop() {
  int finger1_servo;
  int finger1 = constrain_flex_hiLo(flexPin_1, 3, 16, &finger1_servo);
  Serial.print(finger1); Serial.print("     "); Serial.print(finger1_servo); index1.write(finger1_servo);
  Serial.println();
  delay(5);
}


int constrain_flex_hiLo(int flexPin, int lo, int hi, int *p) {
  int finger = analogRead(flexPin);
  finger = constrain(finger, lo, hi);
  int fingerServo = map(finger, lo, hi, 0, 180);
  *p = fingerServo;
  return finger;
}