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[求助] 向大佬们求助~！步进电机与超声波传感器如何同时使用

我的步进电机用的是42步进电机FIT0349，型号为42BYGH40-18-22A-C5.18。使用了步进电机驱动扩展板DRI0023。

超声波传感器使用的是SRF05。

想要的效果是超声波测得的距离值，控制灯带亮度与步进电机转速。但发现无法将步进电机程序与超声波传感器编入一个文件中:'(向大佬们求助，看看我哪里代码错了。

超声波测距仪程序：（使用的是MODE2，trig与echo同pin）
[mw_shl_code=cpp,true]//import
#include <NewPing.h> //sonar
#include <Adafruit_NeoPixel.h> //LED

//define pins
#define N_TRIG_PIN  9 // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define N_ECHO_PIN  9 // Arduino pin tied to echo pin on the ultrasonic sensor.

#define MAX_DISTANCE 400 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.
#define SONAR_NUM 1
#define PING_INTERVAL 33

#define LED_PIN 3 // Pin tied to LED

boolean human = 0;

int pingTimer; // Holds the times when the next ping should happen for each sensor.
int cm;       // Where the ping distances are stored.
uint8_t currentSensor = 0;       // Keeps track of which sensor is active.

//set
NewPing sonar =
  NewPing(N_TRIG_PIN, N_ECHO_PIN, MAX_DISTANCE);  // NewPing setup of pins and maximum distance.

Adafruit_NeoPixel strip = Adafruit_NeoPixel(20, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup(){
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  pingTimer = millis() + 75;          // First ping starts at 75ms, gives time for the Arduino to chill before starting.

  strip.begin();
  strip.show();
}

void loop(){
if (millis() >= pingTimer) {       // Is it this sensor's time to ping?
   pingTimer += PING_INTERVAL * SONAR_NUM;  // Set next time this sensor will be pinged.
   sonar.timer_stop();       // Make sure previous timer is canceled before starting a new ping (insurance).
   cm = 0;                   // Make distance zero in case there's no ping echo for this sensor.
   sonar.ping_timer(echoCheck); // Do the ping (processing continues, interrupt will call echoCheck to look for echo).
}
}

//handle functions
void echoCheck() { // If ping received, set the sensor distance to array.
  if (sonar.check_timer()) {
cm = sonar.ping_result / US_ROUNDTRIP_CM;
pingResult();
  }
}

void pingResult() { // Sensor got a ping, do something with the result.
  // The following code would be replaced with your code that does something with the ping result.
  if(cm > 100){
cm = 0;
  }
  human = cm;
  Serial.println(human);
  if(human == 0) {
for(int i=0;i<20;i++){
   strip.setPixelColor(i, 100, 100, 100);
   strip.show();
}
  }
  else{
for(int i=0;i<5;i++){
   int d = int(255 - cm*1.55);
   strip.setPixelColor(i, d, d, d);
   strip.show();
}
for(int j=5;j<20;j++){
   if(cm < 3){
      cm = 0;
   }
   strip.setPixelColor(j, cm, cm, cm);
   strip.show();
}
  }
  Serial.println(cm);
}
[/mw_shl_code]

步进电机程序：
[mw_shl_code=cpp,true]int Mdirpin = 7; //电机Y方向引脚
int Msteppin = 6;  //电机Y驱动引脚
int Men= 8;       //电机Y使能引脚

void setup()
{
  pinMode(Mdirpin,OUTPUT);
  pinMode(Msteppin,OUTPUT);
  pinMode(Men,OUTPUT);

  digitalWrite(Men, 0); //低电平使能
}
void loop()
{
stepper();
}

void stepper(){
  digitalWrite(Mdirpin, 1);
  for(int j=0;j<=10000;j++){
digitalWrite(Msteppin, 1);  //上升沿步进
digitalWrite(Msteppin, 0);
delay(1);
  }
}[/mw_shl_code]

将两个程序放在一起时，就会有个不运行。估计是因为delay的缘故，但不知道怎么改:'(再次求助大佬们！！多谢~~

求助

步进电机