Merge pull request #52 from CleoQc/master

import libraries on a computer that doesn't have the hardware

Author: CleoQc

Software/Python/easygopigo3.py

@@ -7,7 +7,17 @@
 # import tty
 # import select
 import time
-import gopigo3
+hardware_connected = True
+try:
+    import gopigo3
+except ImportError:
+    hardware_connected = False
+    print("Cannot import gopigo3 library")
+except Exception as e:
+    hardware_connected = False
+    print("Unknown issue while importing gopigo3")
+    print(e)
+    
 
 # from datetime import datetime
 
@@ -290,40 +300,9 @@ def turn_degrees(self, degrees, blocking=False):
                     StartPositionRight - WheelTurnDegrees) is False:
                 time.sleep(0.1)
 
-# the following functions may be redundant
-my_gpg = EasyGoPiGo3()
-
-
-# these functions are here because we need direct access to these
-# for the Drive functionality in Sam
-# they do not need locking as the fct they call handles that.
-def volt():
-    return_value = my_gpg.volt()
-    return return_value
-
-
-def stop():
-    my_gpg.stop()
-
-
-def forward():
-    my_gpg.forward()
-
-
-def backward():
-    my_gpg.backward()
-
-
-def left():
-    my_gpg.left()
-
-
-def right():
-    my_gpg.right()
-
 
 #############################################################
-#
+# SENSORS
 #############################################################
 
 

Software/Python/gopigo3.py

@@ -10,20 +10,27 @@
 from __future__ import print_function
 from __future__ import division
 #from builtins import input
+hardware_connected = True
 
 import subprocess # for executing system calls
-import spidev
+try:
+    import spidev
+    import fcntl      # for lockf mutex support
+except:
+    hardware_connected = False
+    print ("Can't import spidev or fcntl")
+    
 import math       # import math for math.pi constant
-import fcntl      # for lockf mutex support
 import time
 
 FIRMWARE_VERSION_REQUIRED = "0.3.x" # Make sure the top 2 of 3 numbers match
 
-GPG_SPI = spidev.SpiDev()
-GPG_SPI.open(0, 1)
-GPG_SPI.max_speed_hz = 500000
-GPG_SPI.mode = 0b00
-GPG_SPI.bits_per_word = 8
+if hardware_connected:
+    GPG_SPI = spidev.SpiDev()
+    GPG_SPI.open(0, 1)
+    GPG_SPI.max_speed_hz = 500000
+    GPG_SPI.mode = 0b00
+    GPG_SPI.bits_per_word = 8
 
 
 class Enumeration(object):