Created base class with tests

gpioController.py

@@ -0,0 +1,110 @@
+import RPi.GPIO as io
+from sys import exit
+
+class gpioController:
+
+    #constants
+    BOARD_MODE=""
+    BCM = "BCM"
+    BOARD = "BOARD"
+    ALLOWED_PINS_BCM = [4, 17, 18, 21, 22, 23, 24, 25]
+    ALLOWED_PINS_BOARD = [0, 1, 2, 3, 4, 5, 6, 7]
+    ALLOWED_PINS = []
+    USED_PINS = []
+    INITIATED = False
+
+    def __init__(self, pins, boardmode="BCM", showWarnings=False):
+        #set warnings in io
+        if showWarnings is False:
+            io.setwarnings(False)
+        else:
+            io.setwarnings(True)
+        #initiate the board
+        if self.INITIATED is False:
+            if boardmode=="BCM":
+                self.BOARD_MODE="BCM"
+                self.ALLOWED_PINS = self.ALLOWED_PINS_BCM
+                io.setmode(io.BCM)
+                self.INITIATED = True
+            elif boardmode=="BOARD":
+                self.BOARD_MODE="BOARD"
+                self.ALLOWED_PINS = self.ALLOWED_PINS_BOARD
+                io.setmode(io.BOARD)
+                self.INITIATED = True
+            else:
+                raise ValueError('%s is not an allowed, use "BCM" or "BOARD"' % boardmode)
+        else: #INITIATED == TRUE
+            # check that we dont have two conflicting modes
+            if(boardmode != self.BOARD_MODE):
+                raise ValueError('Board mode is already set to %s , cannot use another mode' % self.BOARD_MODE)
+        # Check pins
+        for pin in pins:
+            if(pin not in self.ALLOWED_PINS):
+                raise ValueError('%s is not an allowed pin for %s' % (pin, self.BOARD_MODE))
+            if(pin in self.USED_PINS):
+                raise ValueError('Pin %s is already in use by another device' % pin)
+            # Pin is ready to use
+            self.USED_PINS.append(pin)
+
+# Tests
+if __name__ == '__main__':
+
+    print("==== gpioController - tests ====")
+    # test pins
+    try:
+        print("-------------------------------")
+        print("Wrong pin numbers")
+        t1 = gpioController([777,444,333])
+    except ValueError, e:
+        print("OK")
+        print(e)
+    t1 = None
+    try:
+        print("-------------------------------")
+        print("Wrong boardname")
+        t1 = gpioController([4],"NOTABOARD")
+    except ValueError, e:
+        print("OK")
+        print(e)
+    t1 = None
+    try:
+        print("-------------------------------")
+        print("Same pin numbers in the same init")
+        t1 = gpioController([4,4,4])
+    except ValueError, e:
+        print("OK")
+        print(e)
+    t1 = None
+    try:
+        print("-------------------------------")
+        print("Using the same pin in two different controllers")
+        print("the second init should fail")
+        print("First one")
+        t1 = gpioController([4,17,18])
+    except ValueError, e:
+        print("Failed to create first one!")
+        print(e)
+        sys.exit(1)
+    try:
+        print("Second one")
+        t2 = gpioController([21,22,4])
+    except ValueError, e:
+        print("OK")
+        print(e)
+    t1 = None
+    t2 = None
+    try:
+        print("-------------------------------")
+        print("Try using two different boardmodes")
+        print("Creating first one with BCM")
+        t1 = gpioController([4],"BCM")
+    except ValueError, e:
+        print("First one failed!")
+        print(e)
+        sys.exit(1)
+    try:
+        print("Creating second one with BOARD")
+        t2 = gpioController([1],"BOARD")
+    except ValueError, e:
+        print("OK")
+        print(e)