From af2d66f9e7a604cfec51d6e7b66d5f90827fe7bb Mon Sep 17 00:00:00 2001
From: Jakob Stendahl <jakob.stendahl@outlook.com>
Date: Tue, 18 Oct 2016 12:46:55 +0200
Subject: Added functions, error-handling

Added errorhandeler
Added try-catch
---
 Raspberry Pi/i2cPixel.py | 43 ++++++++++++++++++++++++++++++++++++-------
 Raspberry Pi/python.py   | 28 +++++++++++++++++++++++++++-
 2 files changed, 63 insertions(+), 8 deletions(-)

diff --git a/Raspberry Pi/i2cPixel.py b/Raspberry Pi/i2cPixel.py
index 936c828..6d74a68 100644
--- a/Raspberry Pi/i2cPixel.py	
+++ b/Raspberry Pi/i2cPixel.py	
@@ -1,6 +1,11 @@
+""" Includes """
 import smbus
+import sys
 import time
 
+""" Variables """
+lockdown = False
+
 def version():
     print "i2cPixel is Version 1.0.0"
 
@@ -10,36 +15,60 @@ def setAddress(address):
 
 def setBus(n):
     global bus
-    bus = smbus.SMBus(n)
+	try:
+		bus = smbus.SMBus(n)
+	except:
+		errorMsg = sys.exc_info()[0]
+		errorHandler(5, errorMsg)
 
+def available():
+	global lockdown
+	return lockdown
+	
 def greeting():
     """ Send heartbeat """
     bus.write_byte(arduinoAddress, 0x01)
 
     """ Wait for response """
-    try:
+    try:	
         response = bus.read_byte(arduinoAddress)
         if response == 0x01:
             returnMsg = True
         else:
             returnMsg = False
     except:
+		errorMsg = sys.exc_info()[0]
+		errorHandler(5, errorMsg)
         returnMsg = False
+		
     """ Return if heartbeat was received """        
     return returnMsg
 
 def setPixel(n, red, green, blue):
-    """ Send values for switching a pixel on """
-    bus.write_block_data(arduinoAddress, 0x02, [n, red, green, blue])
+    """ Send values for changing pixel values """
+	try:
+		bus.write_block_data(arduinoAddress, 0x02, [n, red, green, blue])
+	except:
+		errorMsg = sys.exc_info()[0]
+		errorHandler(5, errorMsg)
 
 def show():
-    bus.write_byte(arduinoAddress, 0x03)
+	""" Send values for turning pixels on """
+	try:
+		bus.write_byte(arduinoAddress, 0x03)
+	except:
+		errorMsg = sys.exc_info()[0]
+		errorHandler(5, errorMsg)
     
 def blink(time, red, green, blue):
-    bus.write_block_data(arduinoAddress, 0x04, [red, green, blue, time])
+	""" Flash all pixels with a colour """
+	try:
+		bus.write_block_data(arduinoAddress, 0x04, [red, green, blue, time])
+	except:
+		errorMsg = sys.exc_info()[0]
+		errorHandler(5, errorMsg)
 
 def waitForSensor():
-
     while True:
         try:
             sensorData = bus.read_byte(arduinoAddress)
diff --git a/Raspberry Pi/python.py b/Raspberry Pi/python.py
index 57cf380..6ebb805 100644
--- a/Raspberry Pi/python.py	
+++ b/Raspberry Pi/python.py	
@@ -1,6 +1,7 @@
 """ Imports """
 import logging
 import smbus
+import sys
 import time
 import json
 import i2cPixel
@@ -28,13 +29,38 @@ def lightStaircase(direction):
 	
 	return true
 	
+def errorHandler(type, errorMsg):
+	if type = 1: # Debug
+		logging.debug(errorMsg)
+		print("Debug Message: See logfile")
+	else if type = 2: # info
+		logging.info(errorMsg)
+	else if type = 3: # Warning 
+		logging.warning(errorMsg)
+	else if type = 4: # Error
+		logging.error(errorMsg)
+		print("Error: See logfile")
+	else if type = 5: # Error
+		logging.critical(errorMsg)
+		print("Critical Error: See logfile")
+	else:
+		logging.critical(errorMsg)
+		print("Something went terribly wrong! Not even the errorhandler was able to find out what. Which basically means 'You are doomed'")	
+	
 def setup():
-
+	
+	""" Setup Log File """
+	logging.basicConfig(filename='error.log',level=logging.DEBUG)
+	
+	""" Print first line of log file """
+	logging.info('Starting App')
+	
     """ Setup i2c communication """
     i2cPixel.version()
     i2cPixel.setBus(1)
     i2cPixel.setAddress(0x04)
 
+	
 def main():
     
     """ Wait for heartbeat from Arduino """
-- 
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