'''

Voltaat Learn (http://learn.voltaat.com)

Link to the full tutorial:

Tutorial: Building a project to count the number of prayer cycles using a Raspberry Pi Pico board

The function of this code is to count the number of prayer cycles

Note: You can use this sketch with any Raspberry Pi Pico.

'''

import machine

import utime

from machine import Pin, I2C

from lcd_api import LcdApi

from pico_i2c_lcd import I2cLcd

# -----------------------------

# LCD Configuration

# -----------------------------

I2C_ADDR = 0x27

I2C_ROWS = 2

I2C_COLS = 16

i2c = I2C(0, sda=Pin(16), scl=Pin(17), freq=400000)

lcd = I2cLcd(i2c, I2C_ADDR, I2C_ROWS, I2C_COLS)

# -----------------------------

# Pins

# -----------------------------

trig = Pin(13, Pin.OUT)

echo = Pin(14, Pin.IN)

button = Pin(15, Pin.IN, Pin.PULL_UP)

# -----------------------------

# Variables

# -----------------------------

prostrations = 0

rakats = 0

isProstrating = False

prostrationDistance = 40

# -----------------------------

# Custom characters (bars)

# -----------------------------

bar1 = bytearray([0x1C,0x1E,0x1E,0x1E,0x1E,0x1E,0x1E,0x1C])

bar2 = bytearray([0x07,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x07])

bar3 = bytearray([0x1F,0x1F,0x00,0x00,0x00,0x00,0x1F,0x1F])

bar4 = bytearray([0x1E,0x1C,0x00,0x00,0x00,0x00,0x18,0x1C])

bar5 = bytearray([0x0F,0x07,0x00,0x00,0x00,0x00,0x03,0x07])

bar6 = bytearray([0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0x1F])

bar7 = bytearray([0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x0F])

bar8 = bytearray([0x1F,0x1F,0x00,0x00,0x00,0x00,0x00,0x00])

lcd.custom_char(1, bar1)

lcd.custom_char(2, bar2)

lcd.custom_char(3, bar3)

lcd.custom_char(4, bar4)

lcd.custom_char(5, bar5)

lcd.custom_char(6, bar6)

lcd.custom_char(7, bar7)

lcd.custom_char(8, bar8)

# -----------------------------

# Distance measuring

# -----------------------------

def measure_distance():

   trig.low()

   utime.sleep_us(2)

   trig.high()

   utime.sleep_us(10)

   trig.low()

   while echo.value() == 0:

       pass

   start = utime.ticks_us()

   while echo.value() == 1:

       pass

   end = utime.ticks_us()

   duration = utime.ticks_diff(end, start)

   distance = (duration * 0.0343) / 2

   return distance

# -----------------------------

# Printing large numbers

# -----------------------------

def printNumber(value, col):

   lcd.move_to(col, 0)

   patterns = {

       0: [[2, 8, 1], [2, 6, 1]],

       1: [[32,32,1], [32,32,1]],

       2: [[5,3,1], [2,6,6]],

       3: [[5,3,1], [7,6,1]],

       4: [[2,6,1], [32,32,1]],

       5: [[2,3,4], [7,6,1]],

       6: [[2,3,4], [2,6,1]],

       7: [[2,8,1], [32,32,1]],

       8: [[2,3,1], [2,6,1]],

       9: [[2,3,1], [7,6,1]]

   }

   top, bottom = patterns[value]

   # Print top row

   lcd.move_to(col, 0)

   for c in top:

       if c == 32:

           lcd.putchar(' ')

       else:

           lcd.putchar(chr(c))

   # Print bottom row

   lcd.move_to(col, 1)

   for c in bottom:

       if c == 32:

           lcd.putchar(' ')

       else:

           lcd.putchar(chr(c))

# -----------------------------

# Main Program

# -----------------------------

# عرض رسالة البداية

lcd.clear()

lcd.move_to(0, 0)

lcd.putstr("     VOLTAAT")  # السطر الأول

lcd.move_to(0, 1)

lcd.putstr(" RAKAT COUNTER")  # السطر الثاني

utime.sleep(2)  # انتظر ثانيتين

# إعداد الشاشة للعرض الرئيسي

lcd.clear()

lcd.move_to(0, 0)

lcd.putstr("Rakat Count:")

printNumber(0, 13)

# -----------------------------

# Loop

# -----------------------------

while True:

   distance = measure_distance()

   # Check for prostration

   if distance < prostrationDistance:

       if not isProstrating:

           isProstrating = True

           prostrations += 1

           # Every two prostrations = one rakat

           if prostrations % 2 == 0:

               rakats += 1

               lcd.move_to(0, 1)

               lcd.putstr(" " * 16)

               printNumber(rakats, 13)

   else:

       isProstrating = False

   # Reset button

   if button.value() == 0:

       prostrations = 0

       rakats = 0

       isProstrating = False

       lcd.move_to(0, 1)

       lcd.putstr(" " * 16)

       printNumber(0, 13)

   utime.sleep_ms(100)

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