Add CP code for Knob Sketcher

CircuitPython_Knob_Sketcher/bigger_sketcher.py

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+import board, busio
+import adafruit_ssd1306
+from simpleio import map_range
+from analogio import AnalogIn
+from digitalio import DigitalInOut, Direction, Pull
+
+# Create SPI bus
+spi = busio.SPI(board.SCK, board.MOSI)
+
+# Create the display
+WIDTH = 128
+HEIGHT = 64
+DC = DigitalInOut(board.D7)
+CS = DigitalInOut(board.D9)
+RST = DigitalInOut(board.D10)
+display = adafruit_ssd1306.SSD1306_SPI(WIDTH, HEIGHT, spi, DC, RST, CS)
+display.fill(0)
+display.show()
+
+# Create the knobs
+READS = 5
+x_knob = AnalogIn(board.A0)
+y_knob = AnalogIn(board.A1)
+
+# Create the clear button
+clear_button = DigitalInOut(board.D12)
+clear_button.direction = Direction.INPUT
+clear_button.pull = Pull.UP
+
+def read_knobs(reads):
+    avg_x = avg_y = 0
+    for _ in range(reads):
+        avg_x += x_knob.value
+        avg_y += y_knob.value
+    avg_x /= reads
+    avg_y /= reads
+    x = map_range(avg_x, 0, 65535, 0, WIDTH - 1)
+    y = map_range(avg_y, 0, 65535, 0, HEIGHT - 1)
+    return int(x), int(y)
+
+while True:
+    while clear_button.value:
+        x, y = read_knobs(READS)
+        display.pixel(x, y, 1)
+        display.show()
+    display.fill(0)
+    display.show()

CircuitPython_Knob_Sketcher/pixel_play.py

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+# Import the needed libraries
+import time
+import random
+import board
+import busio
+from digitalio import DigitalInOut
+import adafruit_ssd1306
+
+# Create I2c bus
+i2c = busio.I2C(board.SCL, board.SDA)
+
+# Define display dimensions and I2C address
+WIDTH = 128
+HEIGHT = 64
+ADDR = 0x3d
+
+# Create the digital out used for display reset
+rst = DigitalInOut(board.D7)
+
+# Create the display
+display = adafruit_ssd1306.SSD1306_I2C(WIDTH, HEIGHT, i2c, addr=ADDR, reset=rst)
+display.fill(0)
+display.show()
+
+# Loop forever drawing random pixels
+while True:
+    for _ in range(500):
+        x = random.randrange(WIDTH)
+        y = random.randrange(HEIGHT)
+        display.pixel(x, y, 1)
+    display.show()
+    time.sleep(0.5)
+    display.fill(0)

CircuitPython_Knob_Sketcher/pixel_simple.py

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+# Import the needed libraries
+import board
+import busio
+from digitalio import DigitalInOut
+import adafruit_ssd1306
+
+# Create I2C bus
+i2c = busio.I2C(board.SCL, board.SDA)
+
+# Define display dimensions and I2C address
+WIDTH = 128
+HEIGHT = 64
+ADDR = 0x3d
+
+# Create the digital out used for display reset
+rst = DigitalInOut(board.D7)
+
+# Create the display
+display = adafruit_ssd1306.SSD1306_I2C(WIDTH, HEIGHT, i2c, addr=ADDR, reset=rst)
+display.fill(0)
+display.show()
+
+# Define pixel location
+x = 42
+y = 23
+# Draw the pixel
+display.pixel(x, y, 1)
+display.show()

CircuitPython_Knob_Sketcher/tiny_sketcher.py

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+import board, busio
+import adafruit_ssd1306
+from simpleio import map_range
+from analogio import AnalogIn
+from digitalio import DigitalInOut
+
+# Create the I2C bus
+i2c = busio.I2C(board.SCL, board.SDA)
+
+# Define display dimensions and I2C address
+WIDTH = 128
+HEIGHT = 64
+ADDR = 0x3d
+
+# Create the digital out used for display reset
+rst = DigitalInOut(board.D7)
+
+# Create the display
+display = adafruit_ssd1306.SSD1306_I2C(WIDTH, HEIGHT, i2c, addr=ADDR, reset=rst)
+display.fill(0)
+display.show()
+
+# Create the knobs
+x_knob = AnalogIn(board.A0)
+y_knob = AnalogIn(board.A1)
+
+while True:
+    x = map_range(x_knob.value, 0, 65535, WIDTH - 1, 0)
+    y = map_range(y_knob.value, 0, 65535, 0, HEIGHT - 1)
+    display.pixel(int(x), int(y), 1)
+    display.show()