Merge pull request #35 from jose1711/esp8266_i2c_setupexample

Add setup example for Lolin's I2C OLED shield.

setup_examples/ssd1306_i2c_esp8266.py

@@ -0,0 +1,30 @@
+# esp8266_setup.py Copy to target as color_setup.py
+
+# Released under the MIT License (MIT). See LICENSE.
+# Copyright (c) 2020 Peter Hinch
+
+# As written, supports:
+# OLED monochromatic display 0.66" 64*48 shield: https://www.wemos.cc/en/latest/d1_mini_shield/oled_0_66.html
+# Edit the driver import for other displays.
+
+# WIRING.
+# - no wiring required if shield placed atop Wemos D1 mini
+#
+# ESP   SSD
+# 3.3v  3.3v
+# Gnd   Gnd
+# GP5   D1 (SCL)
+# GP4   D2 (SDA)
+
+import machine
+import gc
+from drivers.ssd1306.ssd1306 import SSD1306_I2C as SSD
+
+gc.collect()
+
+WIDTH = const(64)
+HEIGHT = const(48)
+
+i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))
+gc.collect()  # Precaution before instantiating framebuf
+ssd = SSD(WIDTH, HEIGHT, i2c)