from machine import Pin
import time

# Define GPIO pins for STEP and DIR
STEP_PIN = 16  # GPIO16 for STEP
DIR_PIN = 17   # GPIO17 for DIR

# Set up the GPIO pins
step = Pin(STEP_PIN, Pin.OUT)
direction = Pin(DIR_PIN, Pin.OUT)

# Function to move stepper motor steps in a given direction
def move_stepper(steps, delay, direction_value):
    direction.value(direction_value)  # Set the direction (1: CW, 0: CCW)
    for _ in range(steps):
        step.high()
        time.sleep_us(delay)  # Short delay for the pulse
        step.low()
        time.sleep_us(delay)  # Short delay between pulses

# Main loop to rotate the motor
try:
    while True:
        # Rotate clockwise 200 steps (one full rotation if motor is 1.8°/step)
        move_stepper(200, 1000, 1)
        time.sleep(1)  # Wait 1 second
        
        # Rotate counterclockwise 200 steps
        move_stepper(200, 1000, 0)
        time.sleep(1)  # Wait 1 second

except KeyboardInterrupt:
    pass