#define EN_PIN    2 //enable
#define DIR_PIN   4 //direction
#define STEP_PIN  3 //step
#include "CurieTimerOne.h"

float temp=0;
String tempstring;

void setup()
{
  pinMode(EN_PIN, OUTPUT);
  digitalWrite(EN_PIN, HIGH); //deactivate driver (LOW active)
  pinMode(DIR_PIN, OUTPUT);
  digitalWrite(DIR_PIN, LOW); //LOW or HIGH
  pinMode(STEP_PIN, OUTPUT);
  digitalWrite(STEP_PIN, LOW);
  digitalWrite(EN_PIN, LOW); //activate driver
  Serial.begin(9600);
   
}

void loop()
{
  tempstring = Serial.readString();
  if(tempstring=="stop"){CurieTimerOne.pwmStop();}
  temp = tempstring.toFloat();
  if(temp){TMC2100(temp);}  //silentstepstick
  //if(temp){A4988(temp);}  //pololu
  temp=0;
}

void A4988( float n )
{
  Serial.print("neue Drehzahl A4988: ");
  Serial.print(n);
  Serial.print("  U/s");
  Serial.print('\n');
  n = 5000/n;
  CurieTimerOne.pwmStart(3, 25.0, n);
}

void TMC2100( float n )
{
  Serial.print("neue Drehzahl TMC2100: ");
  Serial.print(n);
  Serial.print("  U/s");
  Serial.print('\n');
  n = 312.5/n;
  CurieTimerOne.pwmStart(3, 25.0, n);
}