Mech Eng student need help with programming for thesis. PLEASE

hi there,

my aim create code controls stepper motors speed , duration while simultaneously reading potentiometers' value through lcd display.

i have access iic/i2c serial 2.5" lcd 1602 display module, load cell amplifier of made myself simulate potentiometer on output side, byj48 stepper motor , uln2004 motor driver.

what want add functionality motor build 7rpm 35rpm on 5 seconds, displaying on lcd.

then motor amount of turns, lets 10 , want lcd count down 10 0 progresses.

i want use second line of lcd display show feedback 'potentiometer' in form of units such volts.

finally once motor has stopped want arduino average feedback 'potentiometer' during course of test , display average on lcd display.

i getting there, not have knowledge complete it.
i have mechanical , electrical know-how no idea on programming front.


pleassseee helpppp.

code: [select]

/*
connect lcd:
vcc -> 5v,
gnd -> gnd,
sda -> a4,
scl -> a5

connect 24byj-48 stepper motor:
in1 -> d8
in2 -> d9
in3 -> d10
in4 -> d11
vcc ... 5v prefer use external 5v source
   gnd
   
connect load cell amplifier if potentiometer:
5v -> 5v
gnd -> gnd
out -> a0
*/
////////////////////////////////////////////////////////////////////////////////
// include libraries
#include <wire.h>
#include <lcd.h>
#include <liquidcrystal_i2c.h>

////////////////////////////////////////////////////////////////////////////////

// declare variables motor pins
int in1 = 8; // blue   - 28byj48 pin 1
int in2 = 9; // pink   - 28byj48 pin 2
int in3 = 10; // yellow - 28byj48 pin 3
int in4 = 11; // orange - 28byj48 pin 4
// red    - 28byj48 pin 5 (vcc)

int steps = 0;
boolean direction = true;
unsigned long last_time;
unsigned long currentmillis ;
int steps_left = 4096;
long time;

// declare variables lcd display
#define i2c_addr 0x27
#define backlight_pin 3
#define en_pin 2
#define rw_pin 1
#define rs_pin 0
#define d4_pin 4
#define d5_pin 5
#define d6_pin 6
#define d7_pin 7

liquidcrystal_i2c lcd(i2c_addr, en_pin, rw_pin, rs_pin, d4_pin, d5_pin, d6_pin, d7_pin, backlight_pin, positive);
lcd *mylcd = &lcd;

// declare variables load cell amplifier
int sensor_pin = 0;               // center pin of potentiometer



/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  // declare motor pins outputs
  pinmode(in1, output);
  pinmode(in2, output);
  pinmode(in3, output);
  pinmode(in4, output);
  serial.begin(9600);

  // begin lcd display, welcome , dispaly speed , rotation

  lcd.begin(16, 2);               // initialize lcd
  lcd.home ();                    // go home
  lcd.print("welcome back-to-back capstan test machine");

  lcd.home();                     // clear screen
  lcd.print("speed:");            // display speed

  lcd.setcursor(10, 0);           // go end of line 1
  lcd.print("n/min");             // display rotations per minute

  delay(1000);

  lcd.home();                     // clear screen
  lcd.setcursor(0, 0);            // go beginning again
  lcd.print("turns left:");        // remaining test time count down
}
////////////////////////////////////////////////////////////////////////////////
void loop()
{
  while (steps_left > 0) {
    currentmillis = micros();
    if (currentmillis - last_time >= 1000) {
      stepper(1);
      time = time + micros() - last_time;
      last_time = micros();
      steps_left--;
    }
  }
  serial.println(time);
  serial.println("wait...!");
  delay(2000);
  direction = !direction;
  steps_left = 4096;
}
///////////////////////////////////////////////////////////////////////////////
// set pins uln2003 high in sequence 1 4

void stepper(int xw) {
  (int x = 0; x < xw; x++) {
    switch (steps) {
      case 0:
        digitalwrite(in1, low);
        digitalwrite(in2, low);
        digitalwrite(in3, low);
        digitalwrite(in4, high);
        break;
      case 1:
        digitalwrite(in1, low);
        digitalwrite(in2, low);
        digitalwrite(in3, high);
        digitalwrite(in4, high);
        break;
      case 2:
        digitalwrite(in1, low);
        digitalwrite(in2, low);
        digitalwrite(in3, high);
        digitalwrite(in4, low);
        break;
      case 3:
        digitalwrite(in1, low);
        digitalwrite(in2, high);
        digitalwrite(in3, high);
        digitalwrite(in4, low);
        break;
      case 4:
        digitalwrite(in1, low);
        digitalwrite(in2, high);
        digitalwrite(in3, low);
        digitalwrite(in4, low);
        break;
      case 5:
        digitalwrite(in1, high);
        digitalwrite(in2, high);
        digitalwrite(in3, low);
        digitalwrite(in4, low);
        break;
      case 6:
        digitalwrite(in1, high);
        digitalwrite(in2, low);
        digitalwrite(in3, low);
        digitalwrite(in4, low);
        break;
      case 7:
        digitalwrite(in1, high);
        digitalwrite(in2, low);
        digitalwrite(in3, low);
        digitalwrite(in4, high);
        break;
      default:
        digitalwrite(in1, low);
        digitalwrite(in2, low);
        digitalwrite(in3, low);
        digitalwrite(in4, low);
        break;
    }

    ////////////////////////////////////////////////////////////////////////////////
    // display load cell value

    int sensorvalue = analogread(sensor_pin);
    // set cursor second row, first column
    lcd.setcursor(0, 1);
    float voltage = sensorvalue * (5.0 / 1023.0);
    lcd.print(voltage);
    lcd.print("        ");
    delay (100);

    ////////////////////////////////////////////////////////////////////////////////
    setdirection();
  }
}
void setdirection() {
  if (direction == 1) {
    steps++;
  }
  if (direction == 0) {
    steps--;
  }
  if (steps > 7) {
    steps = 0;
  }
  if (steps < 0) {
    steps = 7;
  }

}

and not cross-post, cross-posting wastes time.

duplicate deleted.

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