Merge pull request #16 from adafruit/stemma_i2c

Added commented out board.STEMMA_I2C with explanation

Author: evaherrada

examples/displayio_sh1107_game_of_life.py

@@ -91,7 +91,8 @@ def conway(output):
             output[(output.width - 8) // 2 + j, y] = cj & 1
 
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
 
 # SH1107 is vertically oriented 64x128

examples/displayio_sh1107_mono_128x128_test.py

@@ -16,7 +16,9 @@
 displayio.release_displays()
 
 # For I2C
-display_bus = displayio.I2CDisplay(board.I2C(), device_address=0x3D)
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+display_bus = displayio.I2CDisplay(i2c, device_address=0x3D)
 
 # For SPI:
 # import busio

examples/displayio_sh1107_random_motion.py

@@ -22,7 +22,8 @@
 # oled_reset = board.D9
 
 # Use for I2C
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
 
 # SH1107 is vertically oriented 64x128

examples/displayio_sh1107_simpletest.py

@@ -21,7 +21,8 @@
 # oled_reset = board.D9
 
 # Use for I2C
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
 
 # SH1107 is vertically oriented 64x128