Major cleanup, added all old files (python2) to 'old_v0.1' folder

old_v0.1/lcd_i2c.py

@@ -0,0 +1,169 @@
+#!/usr/bin/python
+#--------------------------------------
+#    ___  ___  _ ____
+#   / _ \/ _ \(_) __/__  __ __
+#  / , _/ ___/ /\ \/ _ \/ // /
+# /_/|_/_/  /_/___/ .__/\_, /
+#                /_/   /___/
+#
+#  lcd_i2c.py
+#  LCD test script using I2C backpack.
+#  Supports 16x2 and 20x4 screens.
+#
+# Author : Matt Hawkins
+# Date   : 20/09/2015
+#
+# http://www.raspberrypi-spy.co.uk/
+#
+# Copyright 2015 Matt Hawkins
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#--------------------------------------
+import smbus
+import time
+from socket import *
+
+host = '10.0.0.41'
+port = 12000
+
+clientSocket = socket(AF_INET, SOCK_DGRAM)
+
+# Define some device parameters
+I2C_ADDR  = 0x27 # I2C device address
+LCD_WIDTH = 20   # Maximum characters per line
+
+# Define some device constants
+LCD_CHR = 1 # Mode - Sending data
+LCD_CMD = 0 # Mode - Sending command
+
+LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line
+LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line
+LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line
+LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line
+
+LCD_BACKLIGHT  = 0x08  # On
+#LCD_BACKLIGHT = 0x00  # Off
+
+ENABLE = 0b00000100 # Enable bit
+
+# Timing constants
+E_PULSE = 0.0005
+E_DELAY = 0.0005
+
+#Open I2C interface
+#bus = smbus.SMBus(0)  # Rev 1 Pi uses 0
+bus = smbus.SMBus(1) # Rev 2 Pi uses 1
+
+def lcd_init():
+  # Initialise display
+  lcd_byte(0x33,LCD_CMD) # 110011 Initialise
+  lcd_byte(0x32,LCD_CMD) # 110010 Initialise
+  lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction
+  lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off 
+  lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size
+  lcd_byte(0x01,LCD_CMD) # 000001 Clear display
+  time.sleep(E_DELAY)
+
+def lcd_byte(bits, mode):
+  # Send byte to data pins
+  # bits = the data
+  # mode = 1 for data
+  #        0 for command
+
+  bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT
+  bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT
+
+  # High bits
+  bus.write_byte(I2C_ADDR, bits_high)
+  lcd_toggle_enable(bits_high)
+
+  # Low bits
+  bus.write_byte(I2C_ADDR, bits_low)
+  lcd_toggle_enable(bits_low)
+
+def lcd_toggle_enable(bits):
+  # Toggle enable
+  time.sleep(E_DELAY)
+  bus.write_byte(I2C_ADDR, (bits | ENABLE))
+  time.sleep(E_PULSE)
+  bus.write_byte(I2C_ADDR,(bits & ~ENABLE))
+  time.sleep(E_DELAY)
+
+def lcd_string(message,line):
+  # 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)
+
+def callApollo():
+  clientSocket.sendto('i2c', (host, port))
+  clientSocket.settimeout(5.0)
+  message, address = clientSocket.recvfrom(1024)
+  message = message.split('$')
+  message.reverse()
+  return message
+
+def main():
+  # Main program block
+
+  # Initialise display
+  lcd_init()
+
+  while True:
+
+    # Send some test
+    message = callApollo()
+    lcd_string(message.pop(), LCD_LINE_1)
+    lcd_string(message.pop(), LCD_LINE_2)
+    lcd_string(message.pop(), LCD_LINE_3)
+    lcd_string(message.pop(), LCD_LINE_4)
+
+    time.sleep(9)
+
+    lcd_string('', LCD_LINE_1)
+    lcd_string('', LCD_LINE_2)
+    lcd_string('', LCD_LINE_3)
+    lcd_string('', LCD_LINE_4)
+    try:
+      lcd_string(message.pop(), LCD_LINE_1)
+      lcd_string(message.pop(), LCD_LINE_2)
+      lcd_string(message.pop(), LCD_LINE_3)
+      lcd_string(message.pop(), LCD_LINE_4)
+    except:
+      pass
+
+    time.sleep(9)
+  
+    # Send some more text
+    lcd_string("PU    27/05  Eksamen",LCD_LINE_1)
+    lcd_string("MMI   01/06  Eksamen",LCD_LINE_2)
+    lcd_string("DB    04/06  Eksamen", LCD_LINE_3)
+    lcd_string("KTN   08/06  Eksamen",LCD_LINE_4)
+
+    time.sleep(9)
+
+if __name__ == '__main__':
+
+  try:
+    main()
+  except KeyboardInterrupt:
+    pass
+  finally:
+    lcd_byte(0x01, LCD_CMD)
+