docs/esp8266: Add SSD1306 to quickref and tutorial.

docs/esp8266/quickref.rst

@@ -424,6 +424,20 @@ The DHT driver is implemented in software and works on all pins::
     d.temperature() # eg. 23.6 (°C)
     d.humidity()    # eg. 41.3 (% RH)
 
+SSD1306 driver
+--------------
+
+Driver for SSD1306 monochrome OLED displays. See tutorial :ref:`ssd1306`. ::
+
+    from machine import Pin, I2C
+    import ssd1306
+
+    i2c = I2C(scl=Pin(5), sda=Pin(4), freq=100000)
+    display = ssd1306.SSD1306_I2C(128, 64, i2c)
+
+    display.text('Hello World', 0, 0, 1)
+    display.show()
+
 WebREPL (web browser interactive prompt)
 ----------------------------------------
 

docs/esp8266/tutorial/index.rst

@@ -31,4 +31,5 @@ to `<https://www.python.org>`__.
    neopixel.rst
    apa102.rst
    dht.rst
+   ssd1306.rst
    nextsteps.rst

docs/esp8266/tutorial/ssd1306.rst

@@ -0,0 +1,93 @@
+.. _ssd1306:
+
+Using a SSD1306 OLED display
+============================
+
+The SSD1306 OLED display uses either a SPI or I2C interface and comes in a variety of
+sizes (128x64, 128x32, 72x40, 64x48) and colours (white, yellow, blue, yellow + blue).
+
+Hardware SPI interface::
+
+    from machine import Pin, SPI
+    import ssd1306
+
+    hspi = SPI(1)  # sck=14 (scl), mosi=13 (sda), miso=12 (unused)
+
+    dc = Pin(4)    # data/command
+    rst = Pin(5)   # reset
+    cs = Pin(15)   # chip select, some modules do not have a pin for this
+
+    display = ssd1306.SSD1306_SPI(128, 64, hspi, dc, rst, cs)
+
+Software SPI interface::
+
+    from machine import Pin, SoftSPI
+    import ssd1306
+
+    spi = SoftSPI(baudrate=500000, polarity=1, phase=0, sck=Pin(14), mosi=Pin(13), miso=Pin(12))
+
+    dc = Pin(4)   # data/command
+    rst = Pin(5)  # reset
+    cs = Pin(15)  # chip select, some modules do not have a pin for this
+
+    display = ssd1306.SSD1306_SPI(128, 64, spi, dc, rst, cs)
+
+I2C interface::
+
+    from machine import Pin, I2C
+    import ssd1306
+
+    # using default address 0x3C
+    i2c = I2C(sda=Pin(4), scl=Pin(5))
+    display = ssd1306.SSD1306_I2C(128, 64, i2c)
+
+Print Hello World on the first line::
+
+    display.text('Hello, World!', 0, 0, 1)
+    display.show()
+
+Basic functions::
+
+    display.poweroff()     # power off the display, pixels persist in memory
+    display.poweron()      # power on the display, pixels redrawn
+    display.contrast(0)    # dim
+    display.contrast(255)  # bright
+    display.invert(1)      # display inverted
+    display.invert(0)      # display normal
+    display.rotate(True)   # rotate 180 degrees
+    display.rotate(False)  # rotate 0 degrees
+    display.show()         # write the contents of the FrameBuffer to display memory
+
+Subclassing FrameBuffer provides support for graphics primitives::
+
+    display.fill(0)                         # fill entire screen with colour=0
+    display.pixel(0, 10)                    # get pixel at x=0, y=10
+    display.pixel(0, 10, 1)                 # set pixel at x=0, y=10 to colour=1
+    display.hline(0, 8, 4, 1)               # draw horizontal line x=0, y=8, width=4, colour=1
+    display.vline(0, 8, 4, 1)               # draw vertical line x=0, y=8, height=4, colour=1
+    display.line(0, 0, 127, 63, 1)          # draw a line from 0,0 to 127,63
+    display.rect(10, 10, 107, 43, 1)        # draw a rectangle outline 10,10 to 107,43, colour=1
+    display.fill_rect(10, 10, 107, 43, 1)   # draw a solid rectangle 10,10 to 107,43, colour=1
+    display.text('Hello World', 0, 0, 1)    # draw some text at x=0, y=0, colour=1
+    display.scroll(20, 0)                   # scroll 20 pixels to the right
+
+    # draw another FrameBuffer on top of the current one at the given coordinates
+    import framebuf
+    fbuf = framebuf.FrameBuffer(bytearray(8 * 8 * 1), 8, 8, framebuf.MONO_VLSB)
+    fbuf.line(0, 0, 7, 7, 1)
+    display.blit(fbuf, 10, 10, 0)           # draw on top at x=10, y=10, key=0
+    display.show()
+
+Draw the MicroPython logo and print some text::
+
+    display.fill(0)
+    display.fill_rect(0, 0, 32, 32, 1)
+    display.fill_rect(2, 2, 28, 28, 0)
+    display.vline(9, 8, 22, 1)
+    display.vline(16, 2, 22, 1)
+    display.vline(23, 8, 22, 1)
+    display.fill_rect(26, 24, 2, 4, 1)
+    display.text('MicroPython', 40, 0, 1)
+    display.text('SSD1306', 40, 12, 1)
+    display.text('OLED 128x64', 40, 24, 1)
+    display.show()