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docs/esp8266: Add SSD1306 to quickref and tutorial.

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Mike Causer 2021-04-30 14:00:13 +10:00 committed by Damien George
parent d43ed087ae
commit 97fee47716
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14
docs/esp8266/quickref.rst
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@ -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)
----------------------------------------

1
docs/esp8266/tutorial/index.rst
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@ -31,4 +31,5 @@ to `<https://www.python.org>`__.
neopixel.rst
apa102.rst
dht.rst
ssd1306.rst
nextsteps.rst

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docs/esp8266/tutorial/ssd1306.rst Normal file
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@ -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()