Check provided address and ping on correct bus

Author: sfe-SparkFro

qwiic_keypad.py

@@ -104,7 +104,10 @@ class QwiicKeypad(object):
     def __init__(self, address=None, i2c_driver=None):
 
         # Did the user specify an I2C address?
-        self.address = address if address is not None else self.available_addresses[0]
+        if address in self.available_addresses:
+            self.address = address
+        else:
+            self.address = self.available_addresses[0]
 
         # load the I2C driver if one isn't provided
 
@@ -129,7 +132,7 @@ def is_connected(self):
             :rtype: bool
 
         """
-        return qwiic_i2c.isDeviceConnected(self.address)
+        return self._i2c.isDeviceConnected(self.address)
 
     connected = property(is_connected)