Added functionality to set reset pin and i2c address

README.rst

@@ -52,6 +52,11 @@ initialize()
 
 You have to use this instruction before using the display. This puts the display in its reset status.
 
+Optional Parameters :
+`pinReset` : to specify the pin connected to the reset pin on displays using this function
+
+`i2cAddress` : to specify the i2c address of the screen, default address for the display is `0x3D`
+
 
 clear_oled()
 +++++++++++++++++++++++

samples/hello-world/main.py

@@ -0,0 +1,8 @@
+from ssd1306 import initialize, clear_oled
+from ssd1306_text import add_text
+from microbit import *
+
+
+initialize(pinReset=pin0)
+clear_oled()
+add_text(0, 0, "Salut !!!")

ssd1306.py

@@ -6,9 +6,12 @@
 # Only supports display type I2C128x64
 
 from microbit import i2c
+from microbit import *
 
 # LCD Control constants
-ADDR = 0x3C
+ADDR = 0x3D
+# For Adafruit OLED = 0x3D (0x7A)
+# For chinesse OLED = 0x3C (0x78)
 screen = bytearray(513)  # send byte plus pixels
 screen[0] = 0x40
 zoom = 1
@@ -18,7 +21,7 @@ def command(c):
     i2c.write(ADDR, b'\x00' + bytearray(c))
 
 
-def initialize():
+def initialize(i2cAddress = None, pinReset = None):
     cmd = [
         [0xAE],                     # SSD1306_DISPLAYOFF
         [0xA4],                     # SSD1306_DISPLAYALLON_RESUME
@@ -41,6 +44,15 @@ def initialize():
         [0xd6, 1],                  # zoom on
         [0xaf]                      # SSD1306_DISPLAYON
     ]
+    if i2cAddress:
+        ADDR = i2cAddress
+    if pinReset:
+        pinReset.write_digital(1)
+        sleep(1)
+        pinReset.write_digital(0)
+        sleep(10)
+        pinReset.write_digital(1)
+        sleep(10)
     for c in cmd:
         command(c)
 

ssd1306_text.py

@@ -4,6 +4,7 @@
 
 
 def add_text(x, y, text, draw=1):
+    id = 0
     for i in range(0, min(len(text), 12 - x)):
         for c in range(0, 5):
             col = 0