92 lines
2.3 KiB
Python
92 lines
2.3 KiB
Python
"""
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Display code for signal generator.
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Adafruit invests time and resources providing this open source code.
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Please support Adafruit and open source hardware by purchasing
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products from Adafruit!
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Written by Dave Astels for Adafruit Industries
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Copyright (c) 2018 Adafruit Industries
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Licensed under the MIT license.
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All text above must be included in any redistribution.
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"""
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import math
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import board
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import busio
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import adafruit_ssd1306
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import shapes
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class Display:
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"""Manage the OLED Featherwing display"""
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i2c = None
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oled = None
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shape = None
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frequency = None
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def __init__(self):
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self.i2c = busio.I2C(board.SCL, board.SDA)
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self.oled = adafruit_ssd1306.SSD1306_I2C(128, 32, self.i2c)
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self.oled.fill(0)
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self.oled.show()
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def draw_sine(self):
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for i in range(32):
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self.oled.pixel(i, int(math.sin(i/32 * math.pi * 2) * 16) + 16, 1)
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def draw_square(self):
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for i in range(16):
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self.oled.pixel(0, 32 - i, 1)
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self.oled.pixel(i, 31, 1)
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self.oled.pixel(31, i, 1)
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self.oled.pixel(15, 16 + i, 1)
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self.oled.pixel(15, i, 1)
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self.oled.pixel(16 + i, 0, 1)
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def draw_triangle(self):
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for i in range(8):
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self.oled.pixel(i, 16 + i * 2, 1)
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self.oled.pixel(8 + i, 32 - i * 2, 1)
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self.oled.pixel(16 + i, 16 - i * 2, 1)
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self.oled.pixel(24 + i, i * 2, 1)
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def draw_sawtooth(self):
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for i in range(16):
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self.oled.pixel(0, 16 + i, 1)
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self.oled.pixel(31, i, 1)
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for i in range(32):
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self.oled.pixel(i, 31 - i, 1)
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def update(self):
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self.oled.fill(0)
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if self.shape == shapes.SINE:
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self.draw_sine()
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elif self.shape == shapes.SQUARE:
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self.draw_square()
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elif self.shape == shapes.TRIANGLE:
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self.draw_triangle()
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elif self.shape == shapes.SAWTOOTH:
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self.draw_sawtooth()
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self.oled.text("{0}".format(self.frequency), 40, 10, 1)
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self.oled.show()
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def update_shape(self, shape):
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if shape != self.shape:
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self.shape = shape
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self.update()
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def update_frequency(self, frequency):
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if frequency != self.frequency:
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self.frequency = frequency
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self.update()
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