Updating import and various in examples.

Author: kattni

examples/advanced_examples/circuitplayground_acceleration_mapping_neopixels.py

@@ -3,7 +3,7 @@
 x, y, and z acceleration components map to red, green and blue,
 respectively.
 
-When the CPX is level, the lights are blue because there is no acceleration
+When the Circuit Playground is level, the lights are blue because there is no acceleration
 on x or y, but on z, gravity pulls at 9.81 meters per second per second (m/s²).
 When banking, the vertical (z) axis is no longer directly aligned with gravity,
 so the blue decreases, and red increases because gravity is now pulling more
@@ -14,9 +14,9 @@
 """
 
 import time
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
-cpx.pixels.brightness = 0.2  # Adjust overall brightness as desired, between 0 and 1
+cp.pixels.brightness = 0.2  # Adjust overall brightness as desired, between 0 and 1
 
 
 def color_amount(accel_component):
@@ -41,8 +41,8 @@ def log_values():
 
 
 while True:
-    acceleration = cpx.acceleration
+    acceleration = cp.acceleration
     rgb_amounts = [color_amount(axis_value) for axis_value in acceleration]
-    cpx.pixels.fill(rgb_amounts)
+    cp.pixels.fill(rgb_amounts)
     log_values()
     time.sleep(0.1)

examples/advanced_examples/circuitplayground_gravity_pulls_pixel.py

@@ -1,14 +1,14 @@
 """Gravity Pulls Pixel
 
-This program uses the Circuit Playground Express’s accelerometer to position
+This program uses the Circuit Playground's accelerometer to position
 a white pixel as if gravity were pulling it.
 
 Flip the switch left (toward the notes) to turn on debugging messages and
 slow down the action. See a code walkthrough here: https://youtu.be/sZ4tNOUKRpw
 """
 import time
 import math
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 PIXEL_SPACING_ANGLE = 30
 STANDARD_GRAVITY = 9.81
@@ -21,12 +21,12 @@
 def compute_pixel_angles():
     """Return a list of rotation angles of the ten NeoPixels.
 
-    On the CPX there are ten pixels arranged like the 12 hours of a clock, except that positions
-    6 and 12 are empty. The numbers in the list are the angles from the (x, y) accelerometer
-    values for each pixel when the CPX is rotated with that pixel at the bottom. For example,
-    with pixel 0 at the bottom (and pixel 5 at the top), the accelerometer’s (x, y) values
-    give an angle of 300°. Rotated clockwise 1/12 turn (30°), so that pixel 1 is at the bottom,
-    the angle is 330°.
+    On the Circuit Playground there are ten pixels arranged like the 12 hours of a clock, except
+    that positions 6 and 12 are empty. The numbers in the list are the angles from the (x, y)
+    accelerometer values for each pixel when the Circuit Playground is rotated with that pixel at
+    the bottom. For example, with pixel 0 at the bottom (and pixel 5 at the top), the
+    accelerometer’s (x, y) values give an angle of 300°. Rotated clockwise 1/12 turn (30°), so
+    that pixel 1 is at the bottom, the angle is 330°.
     """
     return [(300 + PIXEL_SPACING_ANGLE * n) % 360 for n in range(12) if n not in (5, 11)]
 
@@ -60,12 +60,12 @@ def positive_degrees(angle):
     return (angle + 360) % 360
 
 
-cpx.pixels.brightness = 0.1  # Adjust overall brightness as desired, between 0 and 1
+cp.pixels.brightness = 0.1  # Adjust overall brightness as desired, between 0 and 1
 pixel_positions = compute_pixel_angles()
 
 while True:
-    debug = cpx.switch  # True is toward the left
-    accel_x, accel_y = cpx.acceleration[:2]  # Ignore z
+    debug = cp.switch  # True is toward the left
+    accel_x, accel_y = cp.acceleration[:2]  # Ignore z
     down_angle = positive_degrees(angle_in_degrees(accel_x, accel_y))
     magnitude_limit = STANDARD_GRAVITY
     normalized_magnitude = min(math.sqrt(accel_x * accel_x + accel_y * accel_y),
@@ -74,7 +74,7 @@ def positive_degrees(angle):
     pixels_lit = []
     for i, pixel_position in enumerate(pixel_positions):
         pe = pixel_brightness(degrees_between(pixel_position, down_angle), normalized_magnitude)
-        cpx.pixels[i] = (pe, pe, pe) if pe else BACKGROUND_COLOR
+        cp.pixels[i] = (pe, pe, pe) if pe else BACKGROUND_COLOR
         if pe:
             pixels_lit.append((i, pe))
 

examples/advanced_examples/circuitplayground_tilting_arpeggios.py

@@ -4,14 +4,15 @@
 Buttons A and B advance forward and backward through the circle. The switch selects
 the type of arpeggio, either dominant seventh or blues.
 
-You can ignore the FrequencyProvider class if you’re just interested in the CPX interface.
+You can ignore the FrequencyProvider class if you’re just interested in the Circuit Playground
+interface.
 
 See a code walkthrough here: https://www.youtube.com/watch?v=cDhqyT3ZN0g
 """
 
 # pylint: disable=R0903
 import time
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 HS_OCT = 12                 # Half-steps per octave
 HS_4TH = 5                  # Half-steps in a fourth
@@ -65,11 +66,11 @@ def freq(self, normalized_position, selected_arpeg):
 class ButtonDetector:
     def __init__(self):
         self.next_press_allowed_at = time.monotonic()
-        self.buttons_on = (cpx.button_a, cpx.button_b)
+        self.buttons_on = (cp.button_a, cp.button_b)
 
     def pressed(self, index):
         """Return whether the specified button (0=A, 1=B) was pressed, limiting the repeat rate"""
-        pressed = cpx.button_b if index else cpx.button_a
+        pressed = cp.button_b if index else cp.button_a
         if pressed:
             now = time.monotonic()
             if now >= self.next_press_allowed_at:
@@ -80,7 +81,7 @@ def pressed(self, index):
 
 class TiltingArpeggios:
     def __init__(self):
-        cpx.pixels.brightness = 0.2
+        cp.pixels.brightness = 0.2
         self.freq_maker = FrequencyMaker()
         TiltingArpeggios.update_pixel(self.freq_maker.circle_pos)
         self.button = ButtonDetector()
@@ -97,18 +98,18 @@ def run(self):
     @staticmethod
     def update_pixel(circle_pos):
         """Manage the display on the NeoPixels of the current circle position"""
-        cpx.pixels.fill((0, 0, 0))
+        cp.pixels.fill((0, 0, 0))
         # Light the pixels clockwise from “1 o’clock” with the USB connector on the bottom
         pixel_index = (4 - circle_pos) % 10
         # Use a different color after all ten LEDs used
         color = (0, 255, 0) if circle_pos <= 9 else (255, 255, 0)
-        cpx.pixels[pixel_index] = color
+        cp.pixels[pixel_index] = color
 
     @staticmethod
     def tilt():
         """Normalize the Y-Axis Tilt"""
         standard_gravity = 9.81  # Acceleration (m/s²) due to gravity at the earth’s surface
-        constrained_accel = min(max(0.0, -cpx.acceleration[1]), standard_gravity)
+        constrained_accel = min(max(0.0, -cp.acceleration[1]), standard_gravity)
         return constrained_accel / standard_gravity
 
     def process_button_presses(self):
@@ -120,12 +121,12 @@ def process_button_presses(self):
 
     def change_tone_if_needed(self):
         """Find the frequency for the current arpeggio and tilt, and restart the tone if changed"""
-        arpeggio_index = 0 if cpx.switch else 1
+        arpeggio_index = 0 if cp.switch else 1
         freq = self.freq_maker.freq(TiltingArpeggios.tilt(), arpeggio_index)
         if freq != self.last_freq:
             self.last_freq = freq
-            cpx.stop_tone()
-            cpx.start_tone(freq)
+            cp.stop_tone()
+            cp.start_tone(freq)
 
 
 TiltingArpeggios().run()

examples/circuitplayground_acceleration.py

@@ -1,8 +1,8 @@
 import time
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 while True:
-    x, y, z = cpx.acceleration
+    x, y, z = cp.acceleration
     print(x, y, z)
 
     time.sleep(0.1)

examples/circuitplayground_acceleration_neopixels.py

@@ -1,21 +1,21 @@
 """If the switch is to the right, it will appear that nothing is happening. Move the switch to the
-left to see the NeoPixels light up in colors related to the accelerometer! The CPX has an
-accelerometer in the center that returns (x, y, z) acceleration values. This program uses those
-values to light up the NeoPixels based on those acceleration values."""
-from adafruit_circuitplayground.express import cpx
+left to see the NeoPixels light up in colors related to the accelerometer! The Circuit Playground
+has an accelerometer in the center that returns (x, y, z) acceleration values. This program uses
+those values to light up the NeoPixels based on those acceleration values."""
+from adafruit_circuitplayground import cp
 
 # Main loop gets x, y and z axis acceleration, prints the values, and turns on
 # red, green and blue, at levels related to the x, y and z values.
 while True:
-    if not cpx.switch:
+    if not cp.switch:
         # If the switch is to the right, it returns False!
         print("Slide switch off!")
-        cpx.pixels.fill((0, 0, 0))
+        cp.pixels.fill((0, 0, 0))
         continue
     else:
         R = 0
         G = 0
         B = 0
-        x, y, z = cpx.acceleration
+        x, y, z = cp.acceleration
         print((x, y, z))
-        cpx.pixels.fill(((R + abs(int(x))), (G + abs(int(y))), (B + abs(int(z)))))
+        cp.pixels.fill(((R + abs(int(x))), (G + abs(int(y))), (B + abs(int(z)))))

examples/circuitplayground_button_a.py

@@ -1,7 +1,7 @@
 """This example turns on the little red LED when button A is pressed."""
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 while True:
-    if cpx.button_a:
+    if cp.button_a:
         print("Button A pressed!")
-        cpx.red_led = True
+        cp.red_led = True

examples/circuitplayground_button_b.py

@@ -1,14 +1,14 @@
 """This example turns the little red LED on only while button B is currently being pressed."""
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 # This code is written to be readable versus being Pylint compliant.
 # pylint: disable=simplifiable-if-statement
 
 while True:
-    if cpx.button_b:
-        cpx.red_led = True
+    if cp.button_b:
+        cp.red_led = True
     else:
-        cpx.red_led = False
+        cp.red_led = False
 
 # Can also be written as:
-#    cpx.red_led = cpx.button_b
+#    cp.red_led = cp.button_b

examples/circuitplayground_buttons_1_neopixel.py

@@ -1,17 +1,17 @@
-"""This example lights up the third NeoPixel while button A is being pressed, and lights up the
+"""This example lights up the third NeoPixel while button A is being pressed, and lights up the
 eighth NeoPixel while button B is being pressed."""
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
-cpx.pixels.brightness = 0.3
-cpx.pixels.fill((0, 0, 0))  # Turn off the NeoPixels if they're on!
+cp.pixels.brightness = 0.3
+cp.pixels.fill((0, 0, 0))  # Turn off the NeoPixels if they're on!
 
 while True:
-    if cpx.button_a:
-        cpx.pixels[2] = (0, 255, 0)
+    if cp.button_a:
+        cp.pixels[2] = (0, 255, 0)
     else:
-        cpx.pixels[2] = (0, 0, 0)
+        cp.pixels[2] = (0, 0, 0)
 
-    if cpx.button_b:
-        cpx.pixels[7] = (0, 0, 255)
+    if cp.button_b:
+        cp.pixels[7] = (0, 0, 255)
     else:
-        cpx.pixels[7] = (0, 0, 0)
+        cp.pixels[7] = (0, 0, 0)

examples/circuitplayground_buttons_neopixels.py

@@ -1,17 +1,17 @@
-"""This example lights up half the NeoPixels red while button A is being pressed, and half the
+"""This example lights up half the NeoPixels red while button A is being pressed, and half the
 NeoPixels green while button B is being pressed."""
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
-cpx.pixels.brightness = 0.3
-cpx.pixels.fill((0, 0, 0))  # Turn off the NeoPixels if they're on!
+cp.pixels.brightness = 0.3
+cp.pixels.fill((0, 0, 0))  # Turn off the NeoPixels if they're on!
 
 while True:
-    if cpx.button_a:
-        cpx.pixels[0:5] = [(255, 0, 0)] * 5
+    if cp.button_a:
+        cp.pixels[0:5] = [(255, 0, 0)] * 5
     else:
-        cpx.pixels[0:5] = [(0, 0, 0)] * 5
+        cp.pixels[0:5] = [(0, 0, 0)] * 5
 
-    if cpx.button_b:
-        cpx.pixels[5:10] = [(0, 255, 0)] * 5
+    if cp.button_b:
+        cp.pixels[5:10] = [(0, 255, 0)] * 5
     else:
-        cpx.pixels[5:10] = [(0, 0, 0)] * 5
+        cp.pixels[5:10] = [(0, 0, 0)] * 5

examples/circuitplayground_ir_receive.py

@@ -1,25 +1,25 @@
 """THIS EXAMPLE REQUIRES A SEPARATE LIBRARY BE LOADED ONTO YOUR CIRCUITPY DRIVE.
 This example requires the adafruit_irremote.mpy library.
 
-This example uses the IR receiver found near the center of the board. Works with another CPX
-running the cpx_ir_transmit.py example. The NeoPixels will light up when the buttons on the
-TRANSMITTING CPX are pressed!"""
+This example uses the IR receiver found near the center of the board. Works with another Circuit
+Playground running the circuitplayground_ir_transmit.py example. The NeoPixels will light up when
+the buttons on the TRANSMITTING Circuit Playground are pressed!"""
 import pulseio
 import board
 import adafruit_irremote
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 # Create a 'pulseio' input, to listen to infrared signals on the IR receiver
 pulsein = pulseio.PulseIn(board.IR_RX, maxlen=120, idle_state=True)
 # Create a decoder that will take pulses and turn them into numbers
 decoder = adafruit_irremote.GenericDecode()
 
 while True:
-    cpx.red_led = True
+    cp.red_led = True
     pulses = decoder.read_pulses(pulsein)
     try:
         # Attempt to convert received pulses into numbers
-        received_code = decoder.decode_bits(pulses, debug=False)
+        received_code = decoder.decode_bits(pulses)
     except adafruit_irremote.IRNECRepeatException:
         # We got an unusual short code, probably a 'repeat' signal
         continue
@@ -30,7 +30,7 @@
     print("Infrared code received: ", received_code)
     if received_code == [66, 84, 78, 65]:
         print("Button A signal")
-        cpx.pixels.fill((100, 0, 155))
+        cp.pixels.fill((100, 0, 155))
     if received_code == [66, 84, 78, 64]:
         print("Button B Signal")
-        cpx.pixels.fill((210, 45, 0))
+        cp.pixels.fill((210, 45, 0))

examples/circuitplayground_ir_transmit.py

@@ -1,14 +1,14 @@
 """THIS EXAMPLE REQUIRES A SEPARATE LIBRARY BE LOADED ONTO YOUR CIRCUITPY DRIVE.
 This example requires the adafruit_irremote.mpy library.
 
-This example uses the IR transmitter found near the center of the board. Works with another CPX
-running the cpx_ir_receive.py example. Press the buttons to light up the NeoPixels on the RECEIVING
-CPX!"""
+This example uses the IR transmitter found near the center of the board. Works with another Circuit
+Playground running the circuitplayground_ir_receive.py example. Press the buttons to light up the
+NeoPixels on the RECEIVING Circuit Playground!"""
 import time
 import pulseio
 import board
 import adafruit_irremote
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 # Create a 'pulseio' output, to send infrared signals from the IR transmitter
 pwm = pulseio.PWMOut(board.IR_TX, frequency=38000, duty_cycle=2 ** 15)
@@ -18,16 +18,16 @@
                                             zero=[550, 1700], trail=0)
 
 while True:
-    if cpx.button_a:
+    if cp.button_a:
         print("Button A pressed! \n")
-        cpx.red_led = True
+        cp.red_led = True
         encoder.transmit(pulseout, [66, 84, 78, 65])
-        cpx.red_led = False
+        cp.red_led = False
         # wait so the receiver can get the full message
         time.sleep(0.2)
-    if cpx.button_b:
+    if cp.button_b:
         print("Button B pressed! \n")
-        cpx.red_led = True
+        cp.red_led = True
         encoder.transmit(pulseout, [66, 84, 78, 64])
-        cpx.red_led = False
+        cp.red_led = False
         time.sleep(0.2)

examples/circuitplayground_light.py

@@ -1,9 +1,9 @@
-"""This example uses the light sensor on your CPX, located next to the picture of the eye. Try
-shining a flashlight on your CPX, or covering the light sensor with your finger to see the values
-increase and decrease."""
+"""This example uses the light sensor on your Circuit Playground, located next to the picture of
+the eye. Try shining a flashlight on your Circuit Playground, or covering the light sensor with
+your finger to see the values increase and decrease."""
 import time
-from adafruit_circuitplayground.express import cpx
+from adafruit_circuitplayground import cp
 
 while True:
-    print("Light:", cpx.light)
-    time.sleep(1)
+    print("Light:", cp.light)
+    time.sleep(0.2)