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| 1 | +# SPDX-FileCopyrightText: Copyright (c) 2024 JG for Cedar Grove Maker Studios |
| 2 | +# SPDX-License-Identifier: MIT |
| 3 | + |
| 4 | +import time |
| 5 | +import board |
| 6 | +import displayio |
| 7 | +import adafruit_ili9341 |
| 8 | +from cedargrove_wavebuilder import WaveBuilder, WaveShape |
| 9 | +from cedargrove_waveviz import WaveViz |
| 10 | + |
| 11 | +# Define wave table parameters |
| 12 | +WAVE_TABLE_LENGTH = 512 # The wave table length in samples |
| 13 | +SAMPLE_MAXIMUM = 32700 # The maximum value of a sample |
| 14 | + |
| 15 | +# Instantiate a built-in display |
| 16 | +# display = board.DISPLAY |
| 17 | + |
| 18 | +# Instantiate the FeatherS2 with 2.4-inch TFT FeatherWing display |
| 19 | +displayio.release_displays() # Release display resources |
| 20 | +display_bus = displayio.FourWire( |
| 21 | + board.SPI(), command=board.D6, chip_select=board.D5, reset=None |
| 22 | +) |
| 23 | +display = adafruit_ili9341.ILI9341(display_bus, width=320, height=240) |
| 24 | +display.rotation = 0 |
| 25 | + |
| 26 | +splash = displayio.Group() |
| 27 | +display.root_group = splash |
| 28 | + |
| 29 | +# Define the Harmonica wave shape, overtone ratio, and amplitude |
| 30 | +tone = [ |
| 31 | + (WaveShape.Sine, 1.00, 0.10), |
| 32 | + (WaveShape.Sine, 2.00, 0.48), |
| 33 | + (WaveShape.Sine, 3.00, 0.28), |
| 34 | + (WaveShape.Sine, 4.00, 0.02), |
| 35 | + (WaveShape.Sine, 5.00, 0.12), |
| 36 | +] |
| 37 | + |
| 38 | +# Create the wave table (wave.wave_table) |
| 39 | +wave = WaveBuilder( |
| 40 | + oscillators=tone, |
| 41 | + table_length=WAVE_TABLE_LENGTH, |
| 42 | + sample_max=SAMPLE_MAXIMUM, |
| 43 | + lambda_factor=1.0, |
| 44 | + loop_smoothing=True, |
| 45 | + debug=False, |
| 46 | +) |
| 47 | + |
| 48 | +# Display a small version on the bottom layer |
| 49 | +small = WaveViz(wave.wave_table, x=0, y=0, width=40, height=40, back_color=0x0000A0) |
| 50 | +splash.append(small) |
| 51 | + |
| 52 | +# Display a full-sized version on the top layer |
| 53 | +large = WaveViz(wave.wave_table, x=20, y=20, width=280, height=200, back_color=None) |
| 54 | +splash.append(large) |
| 55 | + |
| 56 | +while True: |
| 57 | + for x in range(large.width): |
| 58 | + small.x = x - (small.width // 2) + large.x |
| 59 | + small.y = ( |
| 60 | + (large.height // 2) |
| 61 | + - int( |
| 62 | + ( |
| 63 | + wave.wave_table[int(x * WAVE_TABLE_LENGTH / large.width)] |
| 64 | + / large.max_result |
| 65 | + ) |
| 66 | + * large.height |
| 67 | + // 2 |
| 68 | + ) |
| 69 | + - (small.width // 2) |
| 70 | + + large.y |
| 71 | + ) |
| 72 | + time.sleep(0.010) |
| 73 | + for x in range(large.width - 1, -1, -1): |
| 74 | + small.x = x - (small.width // 2) + large.x |
| 75 | + small.y = ( |
| 76 | + (large.height // 2) |
| 77 | + - int( |
| 78 | + ( |
| 79 | + wave.wave_table[int(x * WAVE_TABLE_LENGTH / large.width)] |
| 80 | + / large.max_result |
| 81 | + ) |
| 82 | + * large.height |
| 83 | + // 2 |
| 84 | + ) |
| 85 | + - (small.width // 2) |
| 86 | + + large.y |
| 87 | + ) |
| 88 | + time.sleep(0.010) |
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