'''
Pinout:
A4988:
Step = 17
Dir = 16

Rotary Encoder:
DT = 18
CLK = 19
'''

from machine import Pin
import time

class Port:
    def __init__(self, pin_nums):
        self.pins = [Pin(num, Pin.OUT) for num in pin_nums]

    def write(self, value):
        for i, p in enumerate(self.pins):
            p.value((value >> i) & 1)


def LCD_cmd(RS,E,LCD_Port,cmd):
    RS.value(0)
    MSN = (cmd & 0xF0) >> 4
    LSN = cmd & 0x0F
    LCD_Port.write(MSN)
    E.value(1)
    time.sleep(0.005)
    E.value(0)
    time.sleep(0.005)
    LCD_Port.write(LSN)
    E.value(1)
    time.sleep(0.005)
    E.value(0)
    time.sleep(0.005)

def LCD_data(RS,E,LCD_Port,data):
    RS.value(1)
    MSN = (data & 0xF0) >> 4
    LSN = data & 0x0F
    LCD_Port.write(MSN)
    E.value(1)
    time.sleep(0.005)
    E.value(0)
    time.sleep(0.005)
    LCD_Port.write(LSN)
    E.value(1)
    time.sleep(0.005)
    E.value(0)
    time.sleep(0.005)

def LCD_init(RS,E,LCD_Port):
    LCD_cmd(RS,E,LCD_Port,0x32)
    LCD_cmd(RS,E,LCD_Port,0x0C)
    LCD_cmd(RS,E,LCD_Port,0x01)
    time.sleep(0.002)               # זמן מחיקה ארוך יותר
    LCD_cmd(RS,E,LCD_Port,0x06)

def LCD_Print(RS,E,LCD_Port,string):
    for val in string:
        LCD_data(RS,E,LCD_Port,ord(val))


def LCD_setCursor(RS,E,LCD_Port,x,y):
    if(y==1):
        LCD_cmd(RS,E,LCD_Port,0x80 | x)

    elif(y==2):
        LCD_cmd(RS,E,LCD_Port,0xC0 | x)

step = Pin(17,Pin.OUT,value=0)
direction = Pin(16,Pin.OUT,value=0)

LCD_Port = Port([16, 4, 0, 2])  # D4, D5, D6, D7

RS = Pin(23,Pin.OUT, value=0)
E = Pin(22,Pin.OUT, value=0)

DT = Pin(18,Pin.IN)
CLK = Pin(19,Pin.IN)

count = 0

LCD_init(RS,E,LCD_Port)
LCD_setCursor(RS,E,LCD_Port,0,1)
LCD_Print(RS,E,LCD_Port,f'Count: {count}')

last_clk_val = 1

while True:
    new_clk_val = CLK.value()
    if(not(new_clk_val == last_clk_val)):
        last_clk_val = new_clk_val
        dt_val = DT.value()
        if(new_clk_val == 0 and dt_val == 1):
            print('CW')
            direction.value(1)
            step.value(1)
            time.sleep_ms(5)
            step.value(0)
            count = count + 1
        if(new_clk_val == 0 and dt_val == 0):
            print('CCW')
            direction.value(0)
            step.value(1)
            time.sleep_ms(5)
            step.value(0)
            count = count - 1

        LCD_setCursor(RS,E,LCD_Port,0,1)
        LCD_Print(RS,E,LCD_Port,f'Count: {count}        ')