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Showing content from https://docs.circuitpython.org/projects/simpleio/en/latest/examples.html below:

Simple tests — Adafruit CircuitPython SimpleIO Library 1.0 documentation

Ensure your device works with these simple tests.

 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5'tone_demo.py'.
 6
 7=================================================
 8a short piezo song using tone()
 9"""
10
11import time
12
13import board
14
15import simpleio
16
17while True:
18    for f in (262, 294, 330, 349, 392, 440, 494, 523):
19        simpleio.tone(board.A0, f, 0.25)
20    time.sleep(1)

 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5'shift_in_out_demo.py'.
 6
 7=================================================
 8shifts data into and out of a data pin
 9"""
10
11import time
12
13import board
14import digitalio
15
16import simpleio
17
18# set up clock, data, and latch pins
19clk = digitalio.DigitalInOut(board.D12)
20data = digitalio.DigitalInOut(board.D11)
21latch = digitalio.DigitalInOut(board.D10)
22clk.direction = digitalio.Direction.OUTPUT
23latch.direction = digitalio.Direction.OUTPUT
24
25while True:
26    data_to_send = 256
27    # shifting 256 bits out of data pin
28    latch.value = False
29    data.direction = digitalio.Direction.OUTPUT
30    print("shifting out...")
31    simpleio.shift_out(data, clk, data_to_send, msb_first=False)
32    latch.value = True
33    time.sleep(3)
34
35    # shifting 256 bits into the data pin
36    latch.value = False
37    data.direction = digitalio.Direction.INPUT
38    print("shifting in...")
39    simpleio.shift_in(data, clk)
40    time.sleep(3)

 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5'map_range_demo.py'.
 6
 7=================================================
 8maps a number from one range to another
 9"""
10
11import time
12
13import simpleio
14
15while True:
16    sensor_value = 150
17
18    # Map the sensor's range from 0<=sensor_value<=255 to 0<=sensor_value<=1023
19    print("original sensor value: ", sensor_value)
20    mapped_value = simpleio.map_range(sensor_value, 0, 255, 0, 1023)
21    print("mapped sensor value: ", mapped_value)
22    time.sleep(2)
23
24    # Map the new sensor value back to the old range
25    sensor_value = simpleio.map_range(mapped_value, 0, 1023, 0, 255)
26    print("original value returned: ", sensor_value)
27    time.sleep(2)

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