oled test with framebuf, its really slow with soft-framebuf, but does work

Author: ladyada

examples/ssd1306_framebuftest.py

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+# Basic example of using framebuf capabilities on a SSD1306 OLED display.
+# This example and library is meant to work with Adafruit CircuitPython API.
+# Author: Tony DiCola
+# License: Public Domain
+
+# Import all board pins.
+import time
+import board
+import busio
+from digitalio import DigitalInOut
+
+# Import the SSD1306 module.
+import adafruit_ssd1306
+
+
+# Create the I2C interface.
+i2c = busio.I2C(board.SCL, board.SDA)
+# A reset line may be required if there is no auto-reset circuitry
+reset_pin = DigitalInOut(board.D5)
+
+# Create the SSD1306 OLED class.
+# The first two parameters are the pixel width and pixel height.  Change these
+# to the right size for your display!
+# The I2C address for these displays is 0x3d or 0x3c, change to match
+# A reset line may be required if there is no auto-reset circuitry
+display = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c, addr=0x3d, reset=reset_pin)
+
+print("Framebuf capability test - these are slow and minimal but don't require"
+      "a special graphics management library, only `adafruit_framebuf`")
+
+print("Pixel test")
+# Clear the display.  Always call show after changing pixels to make the display
+# update visible!
+display.fill(0)
+display.show()
+
+# Set a pixel in the origin 0,0 position.
+display.pixel(0, 0, 1)
+# Set a pixel in the middle position.
+display.pixel(display.width//2, display.height//2, 1)
+# Set a pixel in the opposite corner position.
+display.pixel(display.width-1, display.height-1, 1)
+display.show()
+time.sleep(0.1)
+
+print("Lines test")
+# we'll draw from corner to corner, lets define all the pair coordinates here
+corners = ((0, 0), (0, display.height-1), (display.width-1, 0),
+           (display.width-1, display.height-1))
+
+display.fill(0)
+for corner_from in corners:
+    for corner_to in corners:
+        display.line(corner_from[0], corner_from[1],
+                     corner_to[0], corner_to[1], 1)
+display.show()
+time.sleep(0.1)
+
+print("Rectangle test")
+display.fill(0)
+w_delta = display.width / 10
+h_delta = display.height / 10
+for i in range(11):
+    display.rect(0, 0, int(w_delta*i), int(h_delta*i), 1)
+display.show()
+time.sleep(0.1)
+
+print("Text test")
+display.fill(0)
+display.text('hello world', 0, 0, 1)
+char_width = 6
+char_height = 8
+chars_per_line = display.width//6
+for i in range(255):
+    x = char_width * (i % chars_per_line)
+    y = char_height * (i // chars_per_line)
+    display.text(chr(i), x, y, 1)
+display.show()