Protocol for avoiding pointers

[gfvalvo]

@gcjr

void disp () {
    Motor *p = motors;

    for (int n = 0; n < Nmotor; n++, p++)  {
        sprintf (s, "    %2d %2d %3s %6d  %s", p->StepPin, p->DirPin,
            p->forward ? "For" : "Rev", p->pos, p->Desc);
        Serial.println (s);
    }
}

Since the compiler knows both the type and size of the array, I'd argue that loop is better written without pointers and without manually setting the iteration limits:

void disp () {
  for (const auto &mtr : motors)  {
    sprintf (s, "    %2d %2d %3s %6d  %s", mtr.StepPin, mtr.DirPin,
             mtr.forward ? "For" : "Rev", mtr.pos, mtr.Desc);
    Serial.println (s);
  }
}