92 lines
2.4 KiB
Python
92 lines
2.4 KiB
Python
# Copyright (c) 2015 WaveShare
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# Author: My MX
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import math
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import time
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import spidev as SPI
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import SSD1306
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from PIL import Image
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from PIL import ImageFont
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from PIL import ImageDraw
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# Raspberry Pi pin configuration:
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RST = 19
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DC = 16
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bus = 0
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device = 0
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# 128x32 display with hardware SPI:
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disp = SSD1306.SSD1306(rst=RST,dc=DC,spi=SPI.SpiDev(bus,device))
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# Initialize library.
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disp.begin()
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# Get display width and height.
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width = disp.width
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height = disp.height
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# Clear display.
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disp.clear()
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disp.display()
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# Create image buffer.
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# Make sure to create image with mode '1' for 1-bit color.
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image = Image.new('1', (width, height))
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# Load default font.
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font = ImageFont.load_default()
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# Alternatively load a TTF font. Make sure the .ttf font file is in the same directory as this python script!
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# Some nice fonts to try: http://www.dafont.com/bitmap.php
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# font = ImageFont.truetype('Minecraftia.ttf', 8)
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# Create drawing object.
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draw = ImageDraw.Draw(image)
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# Define text and get total width.
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text = 'SSD1306 ORGANIC LED DISPLAY. THIS IS AN OLD SCHOOL DEMO SCROLLER!! GREETZ TO: LADYADA & THE ADAFRUIT CREW, TRIXTER, FUTURE CREW, AND FARBRAUSCH'
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maxwidth, unused = draw.textsize(text, font=font)
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# Set animation and sine wave parameters.
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amplitude = height/4
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offset = height/2 - 4
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velocity = -2
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startpos = width
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# Animate text moving in sine wave.
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print("Press Ctrl-C to quit.")
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pos = startpos
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while True:
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# Clear image buffer by drawing a black filled box.
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draw.rectangle((0,0,width,height), outline=0, fill=0)
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# Enumerate characters and draw them offset vertically based on a sine wave.
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x = pos
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for i, c in enumerate(text):
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# Stop drawing if off the right side of screen.
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if x > width:
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break
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# Calculate width but skip drawing if off the left side of screen.
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if x < -10:
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char_width, char_height = draw.textsize(c, font=font)
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x += char_width
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continue
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# Calculate offset from sine wave.
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y = offset+math.floor(amplitude*math.sin(x/float(width)*2.0*math.pi))
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# Draw text.
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draw.text((x, y), c, font=font, fill=255)
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# Increment x position based on chacacter width.
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char_width, char_height = draw.textsize(c, font=font)
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x += char_width
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# Draw the image buffer.
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disp.image(image)
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disp.display()
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# Move position for next frame.
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pos += velocity
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# Start over if text has scrolled completely off left side of screen.
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if pos < -maxwidth:
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pos = startpos
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# Pause briefly before drawing next frame.
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time.sleep(0.1)
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