raspberry gpio tutorial 7...ultrasonic and LCD display working in tamil

that LCD coding is not available in internet. so that rare coding. so if you want download that..or copy that

Coding for ultrasonic with LCD

import RPi.GPIO as GPIO

import time

def get_distance():

    GPIO.output(trig, True)

    time.sleep(0.0001)

    GPIO.output(trig, False)

    srt = 0

    fsh = 0

    while GPIO.input(echo) == False:

        srt = time.time()

    while GPIO.input(echo) == True:

        fsh = time.time()

    dif = fsh - srt

    dis_cm = dif/0.000058

    return dis_cm

# Define GPIO to LCD mapping

LCD_RS = 26

LCD_E  = 19

LCD_D4 = 13

LCD_D5 = 6

LCD_D6 = 5

LCD_D7 = 11

trig = 4

echo = 18

# Define some device constants

LCD_WIDTH = 16    # Maximum characters per line

LCD_CHR = True

LCD_CMD = False

LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line

LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line

# Timing constants

E_PULSE = 0.0005

E_DELAY = 0.0005

def main():

  # Main program block

  

  GPIO.setwarnings(False)

  GPIO.setmode(GPIO.BCM)       # Use BCM GPIO numbers

  GPIO.setup(LCD_E, GPIO.OUT)  # E

  GPIO.setup(LCD_RS, GPIO.OUT) # RS

  GPIO.setup(LCD_D4, GPIO.OUT) # DB4

  GPIO.setup(LCD_D5, GPIO.OUT) # DB5

  GPIO.setup(LCD_D6, GPIO.OUT) # DB6

  GPIO.setup(LCD_D7, GPIO.OUT) # DB7

  GPIO.setup(trig , GPIO.OUT)

  GPIO.setup(echo , GPIO.IN)

  # Initialise display

  lcd_init()

  while True:

    lcd_string("DISTANCE in cm",LCD_LINE_1)

    dis = get_distance()

    lcd_string(dis,LCD_LINE_2)

    

    time.sleep(1)

def lcd_init():

  # Initialise display

  lcd_byte(0x33,LCD_CMD) 

  lcd_byte(0x32,LCD_CMD) 

  lcd_byte(0x06,LCD_CMD) 

  lcd_byte(0x0C,LCD_CMD) 

  lcd_byte(0x28,LCD_CMD) 

  lcd_byte(0x01,LCD_CMD) 

  time.sleep(E_DELAY)

def lcd_byte(bits, mode):

  # Send byte to data pins

  # bits = data

  # mode = True  for character

  #        False for command

  GPIO.output(LCD_RS, mode) # RS

  # High bits

  GPIO.output(LCD_D4, False)

  GPIO.output(LCD_D5, False)

  GPIO.output(LCD_D6, False)

  GPIO.output(LCD_D7, False)

  if bits&0x10==0x10:

    GPIO.output(LCD_D4, True)

  if bits&0x20==0x20:

    GPIO.output(LCD_D5, True)

  if bits&0x40==0x40:

    GPIO.output(LCD_D6, True)

  if bits&0x80==0x80:

    GPIO.output(LCD_D7, True)

  # Toggle 'Enable' pin

  lcd_toggle_enable()

  # Low bits

  GPIO.output(LCD_D4, False)

  GPIO.output(LCD_D5, False)

  GPIO.output(LCD_D6, False)

  GPIO.output(LCD_D7, False)

  if bits&0x01==0x01:

    GPIO.output(LCD_D4, True)

  if bits&0x02==0x02:

    GPIO.output(LCD_D5, True)

  if bits&0x04==0x04:

    GPIO.output(LCD_D6, True)

  if bits&0x08==0x08:

    GPIO.output(LCD_D7, True)

  # Toggle 'Enable' pin

  lcd_toggle_enable()

def lcd_toggle_enable():

  # Toggle enable

  time.sleep(E_DELAY)

  GPIO.output(LCD_E, True)

  time.sleep(E_PULSE)

  GPIO.output(LCD_E, False)

  time.sleep(E_DELAY)

def lcd_string(message,line):

  # Cast to string

  message = str(message)

  # Send string to display

  message = message.ljust(LCD_WIDTH," ")

  lcd_byte(line, LCD_CMD)

  for i in range(LCD_WIDTH):

    lcd_byte(ord(message[i]),LCD_CHR)

if __name__ == '__main__':

  try:

    main()

  except KeyboardInterrupt:

    pass

  finally:

    lcd_byte(0x01, LCD_CMD)

    lcd_string("Goodbye!",LCD_LINE_1)

    GPIO.cleanup()

***********************************************************************

this is the full coding of that video... that is rare because you cannot download that in internet.

if you want take that.