Beware that both the motor driver shield and DFRduino Uno shall be supplied with power. The motor driver shield needs relatively large current. 

Now, it's done! Do you know how to make one now?

Code

#include <SPI.h>
#include <TMC26XStepper.h>
#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>
//we have a stepper motor with 200 steps per rotation,CS pin 6, dir pin 4, step pin 5 and a current of 300mA
TMC26XStepper tmc26XStepper = TMC26XStepper(200, 6, 4, 5, 800);
void setup() {
  Serial.begin(9600);
  Serial.println("==============================");
  Serial.println("TMC26X Stepper Driver Demo App");
  Serial.println("==============================");
  //set this according to you stepper
  Serial.println("Configuring stepper driver");
  //char constant_off_time, char blank_time, char hysteresis_start, char hysteresis_end, char hysteresis_decrement
  tmc26XStepper.setSpreadCycleChopper(2, 24, 8, 6, 0);
  tmc26XStepper.setRandomOffTime(0);
  tmc26XStepper.SPI_setCoilCurrent(100);
  tmc26XStepper.setMicrosteps(128);
  tmc26XStepper.setStallGuardThreshold(4, 0);
  Serial.println("config finished, starting");
  Serial.println("started");
  mp3_set_serial (Serial);        //set Serial for DFPlayer-mini mp3 module
  mp3_set_volume (30);
  pinMode(3, INPUT);
}
void loop() {
  if (digitalRead(3) == 1)
  {
    tmc26XStepper.SPI_setSpeed(250);   //Set 120 RPM per minute
    tmc26XStepper.SPI_step(-1000);       //Set the running steps to 200 steps
    tmc26XStepper.spi_start() ;         //Motor starting
    delay(100);
    mp3_play (1);                      //play mp3
    delay (5000);
    tmc26XStepper.SPI_setSpeed(250);   //Set 120 RPM per minute
    tmc26XStepper.SPI_step(1000);       //
    tmc26XStepper.spi_start() ;
    delay(100);
  }
}